Answers
Answer: (2 · (-4y)) + (2 · 2x) + (2 · (-3))
Step-by-step explanation: Distribute the 2 by multiplying each term in the parentheses by 2.
Related Questions
6. The line in each graph represente y = 2x Which grach represents 2> y?
Answers
Given the following question:
Which graph represents 2 > y
Both equations are graphed as follows
Since the sign is not less than or equal to it won't be a red line, but a dotted red line.
Your answer is option C.
1 Find the area of the triangle given below and type your result in the empty box. 19 cm 15 cm 12 cm
Answers
We have a right triangle with sides 12 cm, 15 cm and 19 cm.
The area of the triangle is half the product of the legs, as they represent the base and height of the triangle:
[tex]A=\frac{b\cdot h}{2}=\frac{12\cdot15}{2}=6\cdot15=90\operatorname{cm}^2[/tex]NOTE: The legs are the shortest sides that form the right angle of the triangle.
Answer: the area of the triangle is 90 cm^2
Jason owns a small business selling bagels. He knows that in the last week 45
customers paid cash,
8 customers used a debit card, and 6 customers used a credit a
card.
Based on these results, express the probability that the next customer will pay with a
credit card as a decimal to the nearest hundredth.
Answers
The probability that the next customer will pay with a credit card is given by 0.10 approximately.
Given that 8 customers used a debit card and 6 customers used a credit card and 45 customers paid cash.
So the total number of customers = 6+8+45 = 59
The number of customers paid in credit card = 6
Hence the probability that the next customer will pay with a credit card = 6/59 = 0.10 (approximately)
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Two times x, minus the quantity 7 times y, equals 20
Answers
In order to determine the associated algebraic equation of the given statement, you consider part by part.
Two times x: 2x
minus the quantity 7 times y: - 7y
equals 20: = 20
Which is equivalent to:
2x - 7y = 20
i’m a survey 49 peaiple revived a flu vaccine before the flu season and 63 people did not revive the vaccine
Answers
Using the information provided:
Let:
V = Number of people who received the vaccine before the flu
NV = Number of people who didn't receive the vaccine before the flu
F = Number of people who got flu
NF = Number of people who didn't get flue
solve triangles using law of sines , please show work thank you so much! find m
Answers
By Sine Rule,
[tex]\frac{b}{\sin B}=\frac{a}{\sin A}[/tex]Where b=14, a=12, sinA = sin57 and sinB = ?
[tex]\begin{gathered} \frac{14}{\sin B}=\frac{12}{\sin 57} \\ \text{Cross multiply to get} \end{gathered}[/tex][tex]\begin{gathered} 12\sin B=14\sin 57 \\ \\ \sin B=\frac{14\sin 57}{12}=\frac{14\times0.83867}{12}=0.978449 \end{gathered}[/tex][tex]B=\sin ^{-1}(0.978449)=78.08\approx78^o[/tex]Sally test grades in English and 75 and 80 what grade must she get on her next test so the average is in 85?
Answers
Explanation
We are told that Sally scored 75 and 80 on two English tests
We are then asked to determine the next grade she must have so that the average becomes 85
Thus
let the third grade be x
Hence
The total grades of the three tests will be
[tex]75+80+x[/tex]The average of the three tests will be
[tex]\frac{75+80+x}{3}[/tex]Since the average is 85, then we will have
[tex]\frac{75+80+x}{3}=85[/tex]We can now solve for x
[tex]\begin{gathered} 75+80+x=3\times85 \\ 155+x=255 \\ x=255-155 \\ x=100 \end{gathered}[/tex]Thus, she must score 100 on her third test
Find the greatest number that divides 30 and 60 without leaving a remainder.
Answers
The greatest number that divides 30 and 60 without leaving a remainder is its GCF.
Find the GCF of 30 and 60 by listing their factors. We get the following:
The factors of 30 are: 1, 2, 3, 5, 6, 10, 15, 30
The factors of 60 are: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60
Since the greatest common factor of the two numbers is 30, then the greatest number that divides 30 and 60 without remainder is 30.
A randomly generated list of integers from 1 to 5 is being used to simulate anevent, with the numbers 1, 2, 3, and 4 representing a success. What is theestimated probability of a success?
Answers
The theoretical probability is defined as the ratio of the number of favourable outcomes to the number of possible outcomes.
The randomly generated list has the numbers from 1 to 5, therefore, the total amount of elements is 5, which is the number of possible outcomes.
Our event consists of choosing from this list any of the numbers from 1 to 4, which is a total of 4 elements, which represents the number of favourable outcomes.4
Their ratio is:
[tex]\frac{4}{5}[/tex]Rewritting this ratio as a percentage, we have:
[tex]\frac{4}{5}=\frac{80}{100}=80\%[/tex]The answer is option B.
Name the ordered pair for a fourth point. Q. so that points P.Q.R. and S will be the vertices of a Given: Points P6.-1), R(0.-1) and S(4.-5) rectangle Response
Answers
to find Q we need to make 2 distance measure
that they fulfill these conditions
PS=RQ and RS=QP
the formula of distances between 2 points is
[tex]\sqrt[]{(x2-x1)^2+(y2-y1)^2}[/tex]Distance PS
[tex]\begin{gathered} \sqrt[]{(6-4)^2+(-1-(-5))^2} \\ \\ PS=\sqrt[]{20} \end{gathered}[/tex]Distance RQ
[tex]\begin{gathered} \sqrt[]{(0-x)^2+(-1-y)^2} \\ \\ RQ=\sqrt[]{x^2+(1+y)^2} \end{gathered}[/tex]where x and y are de coordinates of Q
Distance RS
[tex]\begin{gathered} \sqrt[]{(0-4)^2+(-1-(-5))^2} \\ \\ RS=\sqrt[]{32} \end{gathered}[/tex]Distance QP
[tex]\begin{gathered} \sqrt[]{(x-6)^2+(y-(-1))^2} \\ \\ QP=\sqrt[]{(x-6)^2+(y+1)^2} \end{gathered}[/tex]now solve the equals
PS=RQ
[tex]\begin{gathered} \sqrt[]{20}=\sqrt[]{x^2+(1+y)^2} \\ 20=x^2+(1+y)^2 \end{gathered}[/tex]RS=QP
[tex]\begin{gathered} \sqrt[]{32}=\sqrt[]{(x-6)^2+(y+1)^2} \\ 32=(x-6)^2+(y+1)^2 \end{gathered}[/tex]if I subtract the two equations I will get
[tex]32-20=(x-6)^2-x^2[/tex]and i will solve to find x
[tex]\begin{gathered} 12=-12x+36 \\ 12x=36-12 \\ x=\frac{24}{12} \\ \\ x=2 \end{gathered}[/tex]the value of x is 2, then I can replace x on any equation to find y
so replacing
[tex]\begin{gathered} 20=x^2+(1+y)^2 \\ 20=(2)^2+y^2+2y+1 \\ y^2+2y+1-20+4=0 \\ y^2+2y-15=0 \end{gathered}[/tex]use factor to solve y
[tex]\begin{gathered} y=\frac{-b\pm\sqrt[]{b^2-4ac}}{2a} \\ \\ y=\frac{-2\pm\sqrt[]{4+60}}{2} \\ \\ y=\frac{-2\pm8}{2} \\ \\ y=-1\pm4 \end{gathered}[/tex]then y will have two values
[tex]\begin{gathered} y_1=-1+4=3 \\ y_2=-1-4=-5 \end{gathered}[/tex]the real coordinate is y=3 because if is y=-5 the point dont form a rectangle
if x=2 and y=3 the point Q is (2,3)
Express tante in terms of sec e for ein Quadrant I.
Answers
Explanation:
We would be applying the trigonometry identity that shows thr=e relationship between tanθ and secθ:
[tex]\sec ^2\theta=tan^2\theta\text{ + 1}[/tex]we make tanθ the subject of formula:
[tex]\begin{gathered} \text{subtract 1 from both sides:} \\ \sec ^2\theta-1=tan^2\theta\text{ + 1}-1 \\ \sec ^2\theta-1=tan^2\theta\text{ } \\ \text{square root both sides:} \\ \sqrt[]{\sec ^2\theta-1)}\text{ =}\sqrt[]{tan^2\theta\text{ }} \end{gathered}[/tex]Can you show the steps in how to solve it
Answers
To break even, the equations must satisfy that
[tex]C(x)=R(x)\text{.}[/tex]Substituting the explicit form of the equations, we get:
[tex]50x+1600=66x\text{.}[/tex]Subtracting 50x, we get:
[tex]\begin{gathered} 50x+1600-50x=66x-50x, \\ 1600=16x\text{.} \end{gathered}[/tex]Dividing by 16, we get:
[tex]\begin{gathered} x=\frac{1600}{16}, \\ x=100. \end{gathered}[/tex]Answer:
[tex]100\text{ units.}[/tex]blake needed at least 225 votes to become president of his seventh-grade class. if three-fourths of the seventh-grade students voted for him and he won. how many seventh-grade students could there be?im looking for the inequality and answer. thank you.
Answers
Given :
The number of votes to win is at least 225 votes
three-fourths of the seventh-grade students voted for him and he won.
Let the number of students = x
So, the inequality will be:
[tex]\frac{3}{4}x\ge225[/tex]Solve the inequality :
Multiply both sides by 4/3
[tex]undefined[/tex]write a linear equation that passes through the points (3,1) and (-2,6)
Answers
The general equation of a line is
[tex]y=mx+b[/tex]where m is the slope and b the y-intercept
we can find m by the formula
[tex]m=\frac{y2-y1}{x2-1}[/tex]where (x2,y2) is a right point of (x1,y1) then if we replace the point of the exercise we can find the slope of the line
[tex]\begin{gathered} m=\frac{1-6}{3-(-2)} \\ \\ m=\frac{-5}{5}=-1 \end{gathered}[/tex]value of the slope is -1
now to find y-intercept or b we replace the slope and a point of the line on the general equation
for example i will use (3,1)
[tex]\begin{gathered} y=mx+b \\ (1)=(-1)(3)+b \\ 1=-3+b \\ b=1+3 \\ b=4 \end{gathered}[/tex]no we can replace the slope -1 and b 4 on the general equation to have the equation of the line to the exercise
[tex]\begin{gathered} y=-x+4 \\ \end{gathered}[/tex]f(x) = x^2 - 8x + 7Find the vertexaxis of symmetrygraph itfind the domainfind the range
Answers
Answers:
Vertex: (4, -9)
axis of symmetry: x = 4
Domain: (-∞, ∞)
Range: [-9, ∞)
Explanation:
If we have a quadratic function with the form y = ax² + bx + c, the x-coordinate of the vertex will be at x = -b/2a
So, for f(x) = x² - 8x + 7, we get a = 1, b = -8 and c = 7, then the x-coordinate of the vertex will be:
[tex]x=\frac{-(-8)}{2(1)}=\frac{8}{2}=4[/tex]Then, the y-coordinate will be the value of f(x) when x = 4
[tex]\begin{gathered} f(x)=x^2-8x+7 \\ f(4)=4^2-8(4)+7 \\ f(4)=16-32+7 \\ f(4)=-9 \end{gathered}[/tex]Therefore, the vertex of the equation is the point (x, y) = (4, -9).
The axis of symmetry is located in the vertex, since the parabola opens up, the axis of symmetry is the vertical line x = 4.
To graph the function, we need to find some points before and after the vertex. So, we will give values to x as 2, 3, 5, and 6. Then, we can calculate f(x) as:
[tex]\begin{gathered} f(2)=2^2-8(2)+7=4-16+7=-5 \\ f(3)=3^2-8(3)+7=9-24+7=-8 \\ f(5)=5^2-8(5)+7=25-40+7=-8 \\ f(6)=6^2-8(6)+7=36-48+7=-5 \end{gathered}[/tex]So, to graph the function, we will use the points (2, -5), (3, -8), (5, -8), (6, -5) and the vertex (4, -9). Therefore, the graph is:
Finally, the domain is the set of values that the variable x can take. In this case, x can be any number, so the domain is the set of all real numbers or written as an interval
(-∞, ∞)
And the range is the set of all values that f(x) can take. In this case, f(x) is always greater than -9, so the range is the set [-9, ∞)
Which of the following is equal to the rational expression when x + 1 or -1? 5(x-1) (x + 1)(x-1)
Answers
Answer
Option A is correct.
[tex]\frac{5}{(x+1)}[/tex]Explanation
We can see that the numerator and the denominator both contain (x - 1).
Hence, that expression cancels out and we are left with
5/(x + 1)
Hope this Helps!!!
Solve for x. x + 58 , x + 128
Answers
given angels are x+58 and x+128.
The sum of the angles in the straight line is 180 degree.
thus,
[tex]\begin{gathered} x+58+x+128=180 \\ 2x+186=180 \\ 2x=180-186 \\ 2x=-6 \\ x=-\frac{6}{2} \\ x=-3 \end{gathered}[/tex]subsitute x =-3 in the equations,
[tex]\begin{gathered} =x+58 \\ =-3+58 \\ =55^{\circ} \end{gathered}[/tex]Also,
[tex]\begin{gathered} =x+128 \\ =-3+128 \\ =125^{\circ} \end{gathered}[/tex]thus, the angles are 55 and 125 degrees.
What is an equation of the line that passes through the points (-1, -6), (6,1)?
Answers
y = x - 5
Explanation:Given:
The points are (-1, -6) and (6, 1)
To find:
the equation of line that pass through the points
To determine the equation of the line, it will be in the form:
[tex]\begin{gathered} y\text{ = mx + b} \\ m\text{ = slope, b = y-intercept} \end{gathered}[/tex]The slope formula is given as:
[tex]$$m\text{ = }\frac{y_2-y_1}{x_2-x_1}$$[/tex][tex]\begin{gathered} x_1=-1,y_1=-6,x_2=6,y_2\text{ = 1} \\ m\text{ = }\frac{1-(-6)}{6-(-1)} \\ m\text{ = }\frac{1+6}{6+1}=\text{ }\frac{7}{7} \\ m\text{ = 1} \end{gathered}[/tex]To get the y-intercept, we will use any of the given points and the slope
[tex]\begin{gathered} Using\text{ point \lparen6, 1\rparen: x = 6, y = 1} \\ y\text{ = mx + b} \\ 1\text{ = 1\lparen6\rparen + b} \\ 1\text{ = 6 + b} \\ 1-6\text{ = b} \\ b\text{ = -5} \end{gathered}[/tex]Next substitute the slope and y-intercept
[tex]\begin{gathered} y\text{ = 1\lparen x\rparen + \lparen-5\rparen} \\ \\ The\text{ equation od the line becomes:} \\ y\text{ = x - 5} \\ \end{gathered}[/tex]. Your friend has 2 credit cards with balances that he cannot afford to pay off all at once. A $500 balanceon a card with 15.99% APR and a $400 card with a 25.99% APR.2. Calculate the monthly finance charges for each credit card. (round to the hundredths place)
Answers
A $500 balance on a card with 15.99% (0.1599) APR:
[tex]\begin{gathered} Monthly\text{f}\imaginaryI nance=500*\frac{0.1599}{12} \\ \\ Monthly\text{f}\imaginaryI nance=6.66 \end{gathered}[/tex]A $400 card with a 25.99% (0.2599)APR:
[tex]\begin{gathered} Monthly\text{f}\mathrm{i}nance=400*\frac{0.2599}{12} \\ \\ Monthly\text{f}\mathrm{i}nance=8.66 \end{gathered}[/tex]Then, the monthly finance charge is: $6.66 for first credit card and $8.66 for second credit card11 less than 4G leaves 37 translate into an expression
Answers
In order to translate the phrase into an expression we need to divide it into 2 sections, the first part states 11 less than 4G, then,
[tex]4G-11[/tex]the second part states the result, then, we need to add an equal sign
[tex]4G-11=37[/tex]Answer:
[tex]4G-11=37[/tex]The accompanying box-and-whisker plots can be used to compare the annual incomes of three professions. Based on the box-and-whisker plots, which statement is true?a - the median income for nuclear engineers is greater than the income of all musiciansb - the median income for police officers and musicians is the samec - all nuclear engineers earn more than all police officersd - a musician will eventually earn more than a police officer
Answers
a - Median income for nuclear engineers: $70,000. Some musicians earn more than $120,000. FALSE
b - Median income for police officers: $30,000
Median income for musicians: $30,000
TRUE
c - Some nuclear engineers earn between $50,0000 and $60,0000
Also, some police officers earn between $50,0000 and $60,0000
FALSE
d - box-and-whisker plots don't allow us to predict future events. Then, maybe or maybe not a musician will eventually earn more than a police officer
describe the transformation of the graph of the parent quadratic function then identify the vertex
Answers
The vertex of a quadratic function can be found by the following expression:
[tex]x=\frac{-b}{2a}[/tex]When we add a number to the argument of the function, "x", we shift the function left or right. If the number is positive the shift happens to the left, if is negative the shift happens to the right.
When we add a number to the whole function we shift the function up or down. If the number is positive the shift is on the upwards direction and if it is negative the shift is on the downwards direction.
When we multiply a function we are stretching or compressing it. If the number is greater than 1, we are compressing the function and if its smaller than 1 we are stretching i.
With this in mind we can find which transformations happened in each option. The original function is:
[tex]f(x)=x^2[/tex]27.
[tex]f(x)=3(x+2)^2+1[/tex]There is a number 3 multiplying the function, so it got compressed by a factor of three. There is a number 2 adding to the variable, so it got shifted left by 2. There is a number 1 adding the whole function, so it got moved upwards by 1.
The vertex of the original function is at (0,0). The function moved upwards by 1 this happens on the y-axis and left by 2 this happens on the x-axis, so the new vertex is (-2,1).
28.
[tex]f(x)=-4(x+1)^2-5[/tex]There is a negaive number, "-4", multiplying the function, so it got compressed by a factor of four and it also got inverted, because the number is negative. There is a number "1" adding the variable, so it got moved one unit to the left. There is a number "-5" adding the whole function, so it got moved five units down.
Since the function moved one unit to the left, changing the x-coordinate for the vertex by "-1" and it also moved five units down, changing the y-coordinate for the vertex by "-5", the new vertex is (-1, -5).
29.
[tex]f(x)=-2x^2+5[/tex]There is a negative number multiplying the function, so it got compressed by a factor of 2 and inverted. There is also a constant adding to the function, so it got moved up by 5 units.
Since the function didn't moved in the x-axis, but got up 5 units on the y-axis the new vertex is (0,5).
30.
[tex]f(x)=\frac{1}{2}(x-1)^2[/tex]There is a number "1/2" multiplying the function, since it is lower than 1, the function got stretched by a factor of 2. There is a constant adding "-1" to the variable, therefore the function got moved to the right by one unit.
Since the function moved 1 unit to the right the new vertex is (1,0).
Write a coordinate rule for the composition
Answers
The coordinate rule for the composition is (x,y) → (y/4, -x/4).
What is coordinate plane rule?
Rules for the coordinate plane are as follows: (x, y) → (x ± h, y ± k) , where h and k are the horizontal and vertical shifts. Recall that h is negative if movement is to the left. K is negative if movement is down.
The coordinate of the vertices of △LMN are L(4,8), M(8, 8), and N(16, 4).
The coordinate of the vertices of △QRS are Q(2,-1), R(2, -2), and S(1, -4).
Assume that the vertices of △LMN is represented by (x, y).
Then the vertices of △QRS can get by (y/4, -x/4).
The coordinate rule for the composition is (x, y) → (y/4, -x/4).
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120 lb to 180 lb increase or decrease
Answers
We are asked to find out whether 120 lb to 180 lb is an increase or decrease?
Since the final amount (180 lb) is greater than the initial amount (120 lb) the difference will be positive.
A positve difference indictes an increase.
[tex]difference=180\: lb-120\: lb=60\: lb[/tex]Therefore, the difference is positive (that is 60 lb) and it is an increase.
Find the measure of each angle in the proplem RE contains point P
Answers
In the given figure, line LP is lie on the line RE, thus from the linear property
Angle LPR + Angle LPE = 180°
It is given that Angle LPR = 3z, angle LPE = 2z
Angle LPR + Angle LPE = 180°
3z° + 2z° = 180°
5z° = 180°
z = 180/5
z=36
Substitute the value of z = 36 in the angle LPR;
Angle LPR = 3z
= 3(36)
=108°
Angle LPE = 2z
= 2(36)
= 72°
Answer : B) 108 and 72
A car wash uses 59 gallons of water every 40 seconds how much water does it use per second
Answers
Answer: 1.475 gallons a second
Step-by-step explanation:
just divide 59/40 and you get your answer for this question
Answer:
1.475
Step-by-step explanation:
59÷40
40 seconds =59
1 seconds=x
c.m
59×1=40x
59÷40
=1.475
Factor using the GCF: 7x-19y
Answers
Answer:
1(7x-19y)
Step-by-step explanation:
these are both prime numbers so the gcf is 1
hopes this helps please mark brainliest
Answer: no solution
Step-by-step explanation: 1. Find the gcf for both numbers. The prime factorization for 7x is just 7 * x. The prime factorization for 19y is 19 * y.
2. 7x and 19y have nothing in common, so therefore it's not factorable
Write the equation of a line parallel to the given line and passes through points (4, 6), and (-2, -6). Hints find the slope by using the slope formula and then write your equation in slope-intercept form show your work in order to get credit!
Answers
Answer:
y = 2x - 2
Step-by-step explanation:
Equation of a line:
In slope-intercept formula, it is:
y = mx + b
In which m is the slope and b is the y-intercept, which is the value of y when x = 0.
Passes through points (4, 6), and (-2, -6).
We find the equation using these two points.
First we find the slope, which is the change in y divided by the change in x.
Change in y: 6 - (-6) = 6 + 6 = 12.
Change in x: 4 - (-2) = 4 + 2 = 6
Slope: m = 12/6 = 2
So:
y = 2x + b
We select one of these points, two find b.
I will select the point (4,6), which means that when x = 4, y = 6. So
y = 2x + b
6 = 2*4 + b
8 + b = 6
b = 6 - 8
b = -2
So the equation of the line is:
y = 2x - 2
I need to determine the length in feet of arc BC?? Is my answer correct?
Answers
l= π/2
1) To find out the length of the arc BC with a central angle ∠BAC, we'll use the following formula:
[tex]l=\frac{\alpha}{360}\cdot2\pi r[/tex]2) Now we can plug into that the given data, considering that ∠ BAC is a central angle then we can affirm:
[tex]m\widehat{BC}=m\angle BAC[/tex]
So we can plug into the formula below 45º as the angle of that arc, as it follows:
[tex]\begin{gathered} l=\frac{\alpha}{360}\cdot2\pi r \\ l=\frac{45}{360}\cdot2\pi\cdot2 \\ l=\frac{1}{2}\pi\text{ or }\frac{\pi}{2} \end{gathered}[/tex]3) Hence, as we can see the answer is the l= π/2
Find the circumference of this circleusing 3 for T.C ~ [?]88C = id
Answers
We have that d = 8, using the formula:
[tex]C=\pi d[/tex]Where π = 3, then
[tex]\begin{gathered} C=\pi d \\ \\ C=3\cdot8 \\ \\ C=24 \end{gathered}[/tex]Then the circumference is 24
[tex]C=24[/tex]