Check the solutions
(6,8)
(-4,-4)
(-7,0)
(3,1)
To check if the pair is a solution to teh system of equations you must replace x and y on both of the equations and see if the equation is fulfilled
(6,8) Is not a solution to the system of a solutions
[tex]\begin{gathered} \begin{aligned}-5(6)+4(8)=2 \\ 3(6)-5(8)=4\end{aligned} \\ \\ -30+32=2\longrightarrow2=2 \\ 18-40=4\longrightarrow-22\ne4 \end{gathered}[/tex](-4,-4) is not a solution to the system of equations
[tex]\begin{gathered} \begin{aligned}-5(-4)+4(-4)=2 \\ 3(-4)-5(-4)=4\end{aligned} \\ \\ 20-16=2\longrightarrow4\ne2 \\ -12+16=4\longrightarrow4=4 \end{gathered}[/tex](-7,0) is not a solution to the system of equations
[tex]\begin{gathered} \begin{aligned}-5(-7)+4(0)=2 \\ 3(-7)-5(0)=4\end{aligned} \\ \\ 35+0=2\longrightarrow35\ne2 \\ -21-0=4-21\ne4 \end{gathered}[/tex](3,1) is not a solution to the system of equations
[tex]\begin{gathered} \begin{aligned}-5(3)+4(1)=2 \\ 3(3)-5(1)=4\end{aligned} \\ \\ -15+4=2\longrightarrow-11\ne2 \\ 9-5=4\longrightarrow4=4 \end{gathered}[/tex]If the value of tan θ<0 and sin θ>0 , then the angle θ must lie in which quadrant?
Given:
[tex]\tan \theta<0\text{ and }\sin \theta>0[/tex][tex]\text{ we know that }\tan \theta=\frac{\sin \theta}{\cos \theta}\text{.}[/tex][tex]\text{ Replace tan}\theta=\frac{\sin \theta}{\cos \theta}\text{ in tan}\theta<0\text{ as follows.}[/tex][tex]\frac{\sin \theta}{\cos \theta}<0[/tex][tex]\text{Multiply cos}\theta\text{ on both sides.}[/tex][tex]\frac{\sin\theta}{\cos\theta}\times\cos \theta<0\times\cos \theta[/tex][tex]\sin \theta<0[/tex][tex]\text{But given that sin}\theta>0[/tex]hence sine value should be equal to 0.
[tex]\sin \theta=0[/tex][tex]\theta=\sin ^{-1}0[/tex][tex]\theta=\sin ^{-1}\sin (n\pi)[/tex][tex]\theta=n\pi\text{ where n is integer.}[/tex]find the measure of an angle whose supplement is thirteen times its component. Hint: The supplement and complement of an angle are (180-0)⁰ and (90-0)⁰ respectively.
If the angles are suplemental it means that their sum equals 180º
Let A represent one angle and B represent the other
The first one A measures x and B is 13 times greather then B=13x
A+B=180º
x+13x=180º
14x=180º
x=12.85
A= 12.85º
B= 12.85*13= 167.05º
evaluate the function found in the previous step at x=-2
Given:
[tex]5x^2+2y=-3x-2y[/tex]To evaluate the function at x=-2, we simplify the given relation first:
[tex]\begin{gathered} 5x^2+2y=-3x-2y \\ \text{Simplify and rearrange} \\ 2y+2y=-3x-5x^2 \\ 4y=-3x^{}-5x^2 \\ y=\frac{-3x^{}-5x^2}{4} \end{gathered}[/tex]We let y=f(x):
[tex]f(x)=\frac{-3x^{}-5x^2}{4}[/tex]Next, we plug in x=-2 into the function:
[tex]\begin{gathered} f(x)=\frac{-3x^{}-5x^2}{4} \\ f(-2)=\frac{-3(-2)-5(-2)^2}{4} \\ \text{Simplify} \\ f(-2)=\frac{-14}{4} \\ f(-2)=-\frac{7}{2} \end{gathered}[/tex]Therefore,
[tex]f(-2)=-\frac{7}{2}[/tex]Determine which of the following statements is NOT correct
THe statement that is not correct is the first one
is 0.343434343434 rational or irrational, explain how u know
EXPLANATION
The number 0.343434343434 is a periodic number rational because the all the periodic numbers are rational ones.
The Voronoi diagram below shows the locations of the four post offices P_{1} , P_{2} P_{3} , and P_{4}in a city.y(km)8P_{3}P2r (km)6P_{1}PKatie's apartment lies inside the shaded circle shown on the diagram.(a) Write down the post office nearest to Katie's apartment.P is located at coordinates (3-6), and the edge between P and P_{i} has the equation y = - 5/3 * x = 16/3(b) Determine the location of PPa is located at coordinates (1.7).3(c) Find the gradient. A. of the edge between P, and P.
Given -
Voronoi diagram:
To Find -
(a) Write down the post office nearest to Katie's apartment.
(b) Determine the location of P4
(c) Find the gradient k. of the edge between P3 and P4
Step-by-Step Explanation -
(a)
We can see from the voronoi diagram that the center of the x-axis where the circle covers is where Katie's apartment is located.
It is located near P4.
So,
P4 is nearest to Katie's apartment.
(b)
The location of P4:
(2, -3)
(c)
[tex]k\text{ = }\frac{Y_2\text{ - Y}_1}{X_2\text{ - X}_1}\text{ = }\frac{7}{50}[/tex]Final Answer -
(a) The post office nearest to Katie's apartment = P4
(b) The location of P4 = (2, -3)
(c) The gradient k of the edge between P3 and P4 = 7/50
HELP PLEASE QUICKLYYY
The equivalent expressions are 3a + b + 13a and 16a + b, 20b + 11a - 3b and 11a + 17b and 20b - 5b + 2b and 17b
How to determine the equivalent expressions?From the question, we have the following parameters that can be used in our computation:
3a + b + 13a
Collect the like terms
So, we have
3a + 13a + b
Evaluate
16a + b
Also, we have
20b + 11a - 3b
Collect the like terms
So, we have
11a + 20b - 3b
Evaluate
11a + 17
Lastly, we have
20b - 5b + 2b
Collect the like terms
So, we have
20b - 5b + 2b
Evaluate
17b
Hence, the equivalent expression of 20b - 5b + 2b is 17b
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How do you write 7 square root x^5 in exponential form
Given:
[tex]7(\sqrt[]{x})^5[/tex]To find the exponential form:
[tex]\begin{gathered} 7(\sqrt[]{x})^5=7(x^{\frac{1}{2}})^5 \\ =7x^{\frac{5}{2}} \end{gathered}[/tex]Hence, exponential form is,
[tex]7x^{\frac{5}{2}}[/tex]23 The list gives information about the favorite color of each of 22 students.• 6 students chose red.• 2 students chose yellow.• 5 more students chose blue than yellow.• 3 fewer students chose purple than red.• The rest of the students chose green.Which frequency table represents the number of students who chose each color?
ANSWER
Option B
EXPLANATION
We are given the information regarding favorite colors of 22 students.
=> 6 students chose red.
=> 2 students chose yellow.
=> 5 more students chose blue than yellow.
Let the number of students that chose blue be b. This means that:
b = yellow + 5
b = 2 + 5
b = 7 students
7 students chose blue.
=> 3 fewer students chose purple than red.
Let the number of people that chose purple be p. This means that:
p = red - 3
p = 6 - 3
p = 3 students
3 students chose purple.
=> The rest of students chose green.
To find the number of students that chose green, add up the number of students that chose the other colors and subtract from the total number of students.
That is:
22 - (6 + 2 + 7 + 3)
22 - 18
= 4 students
4 students chose green.
Therefore, the correct frequencey table is option B.
Lines from Two Points (Point Slope Form) Write the equation of the line that passes through the points (0,8) and (−1,−4). Put your answer in fully reduced point-slope form, unless it is a vertical or horizontal line.
1) The first thing to do is to find out the slope of the line that passes through points (0,8) and (-1,-4). We can do this using the Slope Formula:
[tex]m=\frac{-4-8}{-1-0}=\frac{-12}{-1}=12[/tex]2) Now, we need to find out the linear coefficient "b". Let's pick a point and plug it into the Slope-Intercept Formula with the slope:
[tex]\begin{gathered} y=mx+b \\ 8=12(0)+b \\ b=8 \end{gathered}[/tex]3) Then the answer is:
[tex]y=12x+8[/tex]Jenny is selling raffle tickets. For every 3 tickets, she charges $18. Complete the table below showing the number of tickets and the amount Jenny charges. Number of tickets 3 7 10 Х 5 ? Charge ($) 18 30 48
Given that for every 3 tickets, Jenny charges $18.
Let's find the amount charged for 1 ticket:
[tex]\text{Price per ticket = }\frac{18}{3}=\text{ \$6 per ticket}[/tex]Therefore, Jenny charges $6 for each ticket.
For 5 tickets, the charge is:
5 * 6 = $30
For 7 tickets, the charge is:
7 * 6 = $42
For 10 tickets, the charge is:
10 * 6 = $60
For 8 tickets, the charge is:
8 * 6 = $48
Solve fir X in the equation?
First, find the missing angle of the triangle. Remember that the internal angles of a triangle should add up to 180°, then, the missing angle is given by:
[tex]180-64-27=89[/tex]On the other hand, the angle of 89° plus the angle of (97+x)° should add up to 180 since they are adjacent angles on a straight line. Then:
[tex]89+(97+x)=180[/tex]Solve for x:
[tex]\begin{gathered} \Rightarrow89+97+x=180 \\ \Rightarrow186+x=180 \\ \Rightarrow x=180-186 \\ \Rightarrow x=-6 \end{gathered}[/tex]Therefore, the value of x is:
[tex]-6[/tex]find any points of discontinuity for each rational functiony= 2x^2 + 3 / x^2 + 2
We have the rational function:
[tex]y=\frac{2x^2+3}{x^2+2}[/tex]and we have to find points of discontinuity.
This points happen when the denominator becomes 0, because the function became undefined in those cases.
In this case it would happen when:
[tex]\begin{gathered} x^2+2=0 \\ x^2=-2 \end{gathered}[/tex]As there is no real value for x that makes the square of x be a negative number, we don't have points of discontinuity for this function.
NOTE: x^2+2 has two complex roots and never intercepts the x-axis.
Answer: this function has no points of discontinuity.
Check for asymptotes.
As there are no discontinuities, we don't have vertical asymptotes.
We will check if there are horizontal asymptotes:
[tex]\lim _{x\to\infty}\frac{2x^2+3}{x^2+2}=\frac{\frac{2x^2}{x^2}+\frac{3}{x^2}}{\frac{x^2}{x^2}+\frac{2}{x^2}}=\frac{2+0}{1+0}=2\longrightarrow y=2\text{ is an horizontal asymptote}[/tex]If we repeat for minus infinity (the left extreme of the x-axis), we also get y=2.
PLEASE HELP ASAPName all sets to which the number belongs. There may be more thanone answer.Sqaurerootof50
We have to find to which group the square root of 50 belongs.
Not all square roots are irrational, but some are, like the square root of prime numbers.
In this case we have to factorize 50:
[tex]\sqrt{50}=\sqrt{25\cdot2}=\sqrt{25}\cdot\sqrt{2}=5\sqrt{2}[/tex]As we know that the square root of 2 is irrational, a multiple of this has to be irrational.
So the square root of 50 is an irrational number.
Sally's wallet contains• 5 quarters• 3 dimes• 8 nickels• 4 penniesSally will randomly choose a coin, replace it, and randomly choose another coin. What is teh probability thatshe will choose a dime and then a quater?
Sally's wallet contains the following coins
Quarters = 5
Dimes = 3
Nickels = 8
Pennies = 4
What is the probability that she will choose a dime and then a quarter?
Recall that the probability of an event is given by
[tex]P=\frac{\text{number of favorable outcomes}}{\text{total number of outcomes}}[/tex]The probability that she will choose a dime is given by
[tex]P(dime)=\frac{3}{5+3+8+4}=\frac{3}{20}[/tex]The probability that she will choose a quarter is given by
(note that replacement is allowed so the total number of coins remains the same)
[tex]P(quarter)=\frac{5}{5+3+8+4}=\frac{5}{20}=\frac{1}{4}[/tex]So, the probability that she will choose a dime and then a quarter is
[tex]\begin{gathered} P(dime\: and\: quarter)=P(dime)\times P(quarter) \\ P(dime\: and\: quarter)=\frac{3}{20}\times\frac{1}{4} \\ P(dime\: and\: quarter)=\frac{3}{80} \end{gathered}[/tex]Therefore, the probability that she will choose a dime and then a quarter is 3/80
Find the sales tax.
Sales Tax
Selling Price Rate of Sales Tax Sales Tax
$70.00
3%
?
The sales tax is $.
Answer: $2.10
Step-by-step explanation: 3% of $70 is $2.10.
The total cost would be $72.10
How to calculate percentages:
Divide the number that you want to turn into a percentage by the whole. In this example, you would divide 2 by 5. 2 divided by 5 = 0.4. You would then multiply 0.4 by 100 to get 40, or 40%.
Can someone explain this to me please thank you !!
The figure can be drawn as,
From the triangle ABC,
[tex]\begin{gathered} \sin 70=\frac{AB}{AC} \\ \sin 70=\frac{h}{400ft} \\ h=400\sin 70ft \\ h=375.87ft \\ \approx376ft \end{gathered}[/tex]Thus, the required value of height is 376 ft.
By the Remainder Theorem, what can be said about the polynomial function w(x) if w(−5)=3 ?
the remainder must be _________ when w(x) is divided by _________
thanks so much!
well, ding ding ding!! let's recall the remainder's theorem
if some function f(x) has a factor of say x - a, then if we plug the "a" in f(x) what we get is the remainder, that is, the remainder in a division of f(x) by (x-a).
all that mouthful said, well, since we know of w(-5), that means w(x) must have a factor of x - (-5) or namely x + 5.
we also know that w(-5) = 3, well, that means that 3 is the remainder of such division, that is, w(x) ÷ (x + 5), gives us a remainder of 3.
Kevin scored at the 60th percentile on a test given to 9840 students. How many students scored lower than Kevin? students
Kevin scored at the 60th percentile on a test given to 9840 students.
Percentile of Kevin = 60th
Number of students = 9840
The objective is to find the number of students, those scored lower than Kevin
Let x be the number of students, those scored lower than Kevin.
The formula for the percentile is as follows;
[tex]\text{ Percentile=}\frac{Number\text{ of students who scored lower than kevin}}{Total\text{ number of students}}\times100[/tex]Substitute the value;
[tex]\begin{gathered} \text{ Percentile=}\frac{Number\text{ of students who scored lower than kevin}}{Total\text{ number of students}}\times100 \\ 60=\frac{x}{9840}\times100 \\ x=\frac{9840\times60}{100} \\ x=5904 \end{gathered}[/tex]Therefore, there are 5904 students who cored lower than Kevin out of 9840
Answer : 5904 students
In the triangle below, if < C = 62 °, what is the measure of angle B?
In the given triangle ABC
[tex]BA=BC[/tex]Then the triangle is isosceles
In the isosceles triangle, the base angles are equal
Since [tex]m\angle A=m\angle C[/tex]Since m[tex]m\angle A=62^{\circ}[/tex]In any triangle the sum of angles is 180 degrees, then
[tex]m\angle A+m\angle B+m\angle C=180^{\circ}[/tex]Substitute angles A and C by 62
[tex]\begin{gathered} 62+m\angle B+62=180 \\ \\ m\angle B+124=180 \end{gathered}[/tex]Subtract 124 from both sides
[tex]\begin{gathered} m\angle B+124-124=180-124 \\ \\ m\angle B=56^{\circ} \end{gathered}[/tex]The answer is b
x + y + zX=5 y=3 z=7
If 2/3rd of a trail is 3/4ths of a mile, how long is the whole trail?
Answer:
1 1/2 or 1.5 miles
Step-by-step explanation:
we can multiply 3/4 by 2/3 to see how many miles is in each third of a trail
3/4*2/3=6/12
1/2 of a mile per third of the trail so now we multiply by 3 to get whole trail
1/2 x/3/1=3/2
3/2= 1 1/2
Hopes this helps please mark brainliest
During a probability experiment, Jesse draws one marble each from two different jars and records the result. She then places the marbles back in their respective jars and repeats the experiment for a total of 10 trials. On her first trial, Jesse pulls a blue marble from the first far and a green marble from the second jar, and the results are indicated as BG. The results are shown in the table, where B stands for blue, G stands for green, and R stands for red. Trial 1 2 3 4 5 6 7 8 9 10 Result BG RB RR BG RG BB GG BR GB RR Based on the results in the table, what is the experimental probability of pulling a red marble from the first jar and a green marble from the second jar (RG) ? 1 A. 5 B. 1 6 Ос. 1 OD 1 1 10
SOLUTION AND EXPLANATION OF CONCEPT
From the table in the question, the result for Red in the first jar and green in the second trials (RG) occurs in the fifth trials
The formular for probability is give as
[tex]Pr(E)=\frac{required\text{ outcome}}{total\text{ outcome}}[/tex][tex]Pr(RG)=\frac{Number\text{ of trials for RG}}{Total\text{ number ot Trials}}=\frac{1}{10}[/tex]Hence the probability of red in the fir
S= ut+1/2 at²
U=10 a=-2 t=1/2
The value of the unknown variable, S, is S = 4 3/4
Determining the value of unknown variable in an equationFrom the question, we are to determine the value of the unknown variable in the given equation
From the given information,
The given equation is
S = ut + 1/2at²
Also,
From the given information
u = 10
a = -2
t = 1/2
Substituting the values of u, a, and t into the given equation
S = ut + 1/2at²
S = (10)(1/2) + 1/2(-2)(1/2)²
Simplify
S = 5 + (-1)(1/4)
S = 5 + (-1/4)
S = 5 - 1/4
S = 4 3/4
Hence, the value of S is 4 3/4
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in the figure shown Sigma MN is parallel to y z what is the length of segment MX
We will solve for MX using similar angles theorem
Let line MX be= y
we have to find the ratio of the small triangle to that of the big triangle
Therefore we will have,
[tex]\begin{gathered} \frac{\text{xcm}}{(x+12)cm}=\frac{3.5\operatorname{cm}}{17.5\operatorname{cm}} \\ \text{when we cross multiply we wil have,} \\ 17.5\times x=3.5(x+12) \\ 17.5x=3.5x+42 \\ by\text{ collecting like terms we wll have} \\ 17.5x-3.5x=42 \\ 14x=42 \end{gathered}[/tex]to get x we divide both sides by the coefficient of x which is 14
[tex]\begin{gathered} \frac{14x}{14}=\frac{42}{14} \\ x=3.0\operatorname{cm} \end{gathered}[/tex]Hence ,
[tex]\vec{MX}=3.0\operatorname{cm}[/tex]Therefore,
The correct option will be OPTION A
1. Find the value of x.
2. Find the value of t.
Answer:
x=15
t=2
Step-by-step explanation:
to find x both of these triangles have the same angle measure and we know 2 of them and the sum of all three angles of a triangle always equal 180 degrees
45+90=135
Now we subtract from 180
180-135=45
45 degrees is what 3x is equal to so to figure out X just set 3x equal to 45
3x=45
/3. /3
x=15
Now to find t the 2 sides in the bottom of the triangle are equivalent so we can set them equal to each other
2t=4
/2. /2
t=2
Hopes this helps please mark brainliest
The table shows how the number of sit-ups Marla does each day has changed over time. At this rate, how many sit-ups will she do on Day 12? Explain your steps in solving this problem.see image
Maria willdo 61 sit-ups on Day 12
Explanation
the table represents a linear function so, we can find the equation of the function and then evaluate for day 12
the equation of a line is given by:
[tex]\begin{gathered} y=mx+b \\ \text{where m is the slope} \\ b\text{ is the y-intercept} \end{gathered}[/tex]so
Step 1
find the slope of the line
the slope of a line is given by.
[tex]\begin{gathered} \text{slope}=\frac{change\text{ in y }}{\text{change in x}}=\frac{\Delta y}{\Delta x}=\frac{y_2-y_1}{x_2-x_1} \\ \text{where} \\ P1(x_1,y_1) \\ P2(x_2,y_2) \\ \text{are 2 points from the table } \\ or\text{ 2 coordinates ( from the table)} \end{gathered}[/tex]let
P1(1,17)
P2(4,29)
now, replace
[tex]\begin{gathered} \text{slope}=\frac{y_2-y_1}{x_2-x_1} \\ \text{slope}=\frac{29-17}{4-1}=\frac{12}{3}=4 \\ \text{slope= 4} \end{gathered}[/tex]Step 2
now,find the equation of the line,use the slope-point formula
[tex]\begin{gathered} y-y_1=m(x-x_1) \\ \text{where m is the slope} \\ \end{gathered}[/tex]now, replace
[tex]\begin{gathered} y-y_1=m(x-x_1) \\ y-17=4(x-1) \\ y-17=4x-4 \\ y=4x-4+17 \\ y=4x+13 \end{gathered}[/tex]so,the equation of the lines is
y= 4x+13
Step 3
finally, evaluate for day 12, it is x= 12
so,replace
[tex]\begin{gathered} y=4x+13 \\ y=4(12)+13 \\ y=48+13 \\ y=61 \end{gathered}[/tex]it means Maria will do 61 sit-ups on Day 12
I hope this helps you
Which number line shows points are to represent the opposite of P
Explanation
The given image marks point p at -3 . Therefore, the opposite of -3 is +3. The corresponding number line that marks R as +3 is given as
Answer: Option 2
what is the center and radius for the circle with equation (x-2)^2 + (y-5)^2=49
Solution
For this case we have the following equation given by:
[tex](x-2)^2+(y-5)^2=49[/tex]The general equation of a circle is given by:
[tex](x-h)^2+(y-k)^2=r^2[/tex]And for this case by direct comparison we have:
[tex]r^2=49[/tex]Then we have:
[tex]r=\sqrt[]{49}=7[/tex]And the center si given by C=(h,k)
From the equation given we have:
[tex]C=(2,5)[/tex]If x decreases by 3 units what is the corresponding change in y ?
We have the equation:
[tex]y=6x-2[/tex]The rate of change in linear functions like this is equal to the slope, which in this case is m = 6.
So, for each unit increase in x, y will increase in 6 units.
[tex]\Delta y=m\cdot\Delta x=6\cdot1=6[/tex]This rate of change is constant for linear functions, so when x decreases by 3 units, we expect y to decrease by 3*6 = 18 units, 3 times the slope. So y will be -18 of the previous value.
[tex]undefined[/tex]Answer: a) 6, b) -18.