Answers
45, and
2x - 5
make up a straight angle pair.
So, they add up to 180 degrees.
Thus, we can write:
45 + 2x - 5 = 180
Now, we simply solve for x. Shown below:
[tex]\begin{gathered} 45+2x-5=180 \\ 2x+40=180 \\ 2x=180-40 \\ 2x=140 \\ x=\frac{140}{2} \\ x=70 \end{gathered}[/tex]Related Questions
octavia simplified the expression as shown explain octavia’s error and correct her work
Answers
To simplify
[tex](3x^9)^2(3x^2)^4[/tex]First of all, Octavia error can be spotted from the correct steps below
Step1: Expand the expression
[tex]3^2\times x^{9\times2}\times3^4\times x^{2\times4}=3^2\times x^{18}\times3^4\times x^8[/tex]Step2: Collect like terms
[tex]3^2\times3^4\times x^{18}\times x^8[/tex]Step 3: Simplify by using exponents laws
[tex]3^{2+4}\times x^{18+8}=3^6\times x^{26}[/tex]Step 4: Combine the terms.
The value is
[tex]729x^{26}[/tex]Her error was that she didn't apply the exponents' law properly.
One of the laws she violated was
[tex](a^b)^c=a^{b\times c}[/tex]Her mistake was that she did
[tex](a^b)^c=a^{b+c}\text{ which is wrong}[/tex]So she missed it from our step 1 above
If 180° ≤ ≤ 270 and S(A) = −4 then determine the exact values of cos(A) and tan(A)
Answers
Recall the definition of the sine of an angle on a right triangle:
[tex]\sin (A)=\frac{a}{c}[/tex]On the other hand, according to this diagram, the values for tan(A) and cos(A) are given by:
[tex]\begin{gathered} \cos (A)=\frac{b}{c} \\ \tan (A)=\frac{a}{b} \end{gathered}[/tex]Since 180≤A≤270, the right triangle that corresponds to the angle A on the coordinate plane looks as follows:
Where a and b are negative distances.
Since sin(A)=-4/7, we can assume that a=-4 and c=7. Use the Pythagorean Theorem to find the exact value of b:
[tex]\begin{gathered} a^2+b^2=c^2 \\ \Rightarrow(-4)^2+b^2=7^2 \\ \Rightarrow16+b^2=49 \\ \Rightarrow b^2=49-16 \\ \Rightarrow b^2=33 \\ \Rightarrow|b|=\sqrt[]{33} \end{gathered}[/tex]We know that b should be negative. Then:
[tex]b=-\sqrt[]{33}[/tex]Substitute b=-sqrt(33) and c=7 to find the exact values for cos(A) and tan(A):
[tex]\begin{gathered} \cos (A)=-\frac{\sqrt[]{33}}{7} \\ \tan (A)=\frac{-4}{-\sqrt[]{33}}=\frac{4\cdot\sqrt[]{33}}{33} \end{gathered}[/tex]Therefore, the exact values for cos(A) and tan(A) are:
[tex]\begin{gathered} \cos (A)=-\frac{\sqrt[]{33}}{7} \\ \tan (A)=\frac{4\cdot\sqrt[]{33}}{33} \end{gathered}[/tex]A restaurant offers a 20% off coupon. The tax rate is 7.5% . If an item is listed at $15 , how much does it cost after the coupon and tax have been applied?
Answers
Answer:
11.10 or 11.1
Step-by-step explanation:
1. 15 x 0.075= 1.125 or 1.13
2. 15-1.13=13.87
3. 13.87 x 0.20= 2.774 or 2.77
4. 13.87 - 2.77 = 11.10 or 11.1
The water bottle sale for a music festival started at 5:00 P.M. The table shows the linear relationship between the number of water bottles remaining and the number of hours since 5:00 P.M.
Which equation can be used to determine y, the number of water bottles remaining at the music festival x hours after 5:00 P.M.?
Answers
The equation used to determine y, the number of water bottles remaining at the music festival x hours after 5:00 P.M will be;
⇒ y = - 500x + 5500
What is Equation of line?
The equation of line in point-slope form passing through the points
(x₁ , y₁) and (x₂, y₂) with slope m is defined as;
⇒ y - y₁ = m (x - x₁)
Where, m = (y₂ - y₁) / (x₂ - x₁)
Given that;
The table shows the linear relationship between the number of water bottles remaining and the number of hours since 5:00 P.M.
Now,
Find the linear equation for the given table as;
Take number of hours = x
And, Number of remaining bottles = y
So, Two points for the linear equation as;
⇒ (x, y) = (1, 5000) , (2, 4500)
Thus, The linear equation for the table is,
⇒ y - y₁ = (y₂ - y₁) / (x₂ - x₁) (x - x₁)
⇒ y - 5000 = (4500 - 5000) / (2 - 1) (x - 1)
⇒ y - 5000 = - 500 (x - 1)
⇒ y - 5000 = - 500x + 500
⇒ y = - 500x + 500 + 5000
⇒ y = - 500x + 5500
Thus, The equation used to determine y, the number of water bottles remaining at the music festival x hours after 5:00 P.M will be;
⇒ y = - 500x + 5500
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A line passes through the point (-4, -8) and has a slope of 4.
Write an equation in slope-intercept form for this line.
Answers
[tex](\stackrel{x_1}{-4}~,~\stackrel{y_1}{-8})\hspace{10em} \stackrel{slope}{m} ~=~ 4 \\\\\\ \begin{array}{|c|ll} \cline{1-1} \textit{point-slope form}\\ \cline{1-1} \\ y-y_1=m(x-x_1) \\\\ \cline{1-1} \end{array}\implies y-\stackrel{y_1}{(-8)}=\stackrel{m}{ 4}(x-\stackrel{x_1}{(-4)}) \implies y +8= 4 (x +4) \\\\\\ y+8=4x+16\implies {\Large \begin{array}{llll} y=4x+8 \end{array}}[/tex]
Geometry Pls Help, I need hthis very fast
Answers
The translation rule is (x, y) ---> (x+8)(x-4).
What is translation rule?
A translation is a type of transformation that moves each point in a figure the same distance in the same direction. The second notation is a mapping rule of the form (x,y) → (x−7,y+5).
A translation in math moves a shape left or right and/or up or down. The translated shapes look exactly the same size as the original shape, and hence the shapes are congruent to each other.
Given,
let A =(x, y) ----> (x+9,y-2) and B =(x, y) ----> (x-1,y-2)
which means A is translated 9 units right and 2 units down
and B is translated 1 unit left and 2 units down.
Therefore, rule for composition is A+B
= (x, y) ------> (x+9-1, y-2-2)
(x,y) -----> (x+8,y-4)
which means translation is 8 units right and 4 units down.
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The aspect ratio for a computer screenis 118. If the width of the computer screen is 13.5inches. What is the begi of the mean?Answer question 1 photo attached
Answers
The aspect ratio for a computer screen is
if the width equals 13.5, then the height is:
[tex]h=\frac{13.5}{1.8}=7.5[/tex]Solve. Round the answer to the nearest cent, if necessary.Last year the profit for a company was $483,000. This year's profit decreased by 2.1%. Find this year's profit.
Answers
year's
this year´s profit is $ 472857
Explanation
we can easily solve this by using a rule of three
so
Step 1
a)let x represents this year's profit
so
if it is decreases by 2.1 %
[tex]\begin{gathered} x=100-2.1\text{ = 97}.9 \\ x=97.9\text{\%} \end{gathered}[/tex]so, this year's profit is 97.9% of the last year profit
hence
[tex]\begin{gathered} \text{if} \\ 483000\rightarrow100\text{ \%} \\ x\rightarrow97.9\text{ \%} \end{gathered}[/tex]we can make a proportion
[tex]\frac{483000}{100}=\frac{x}{79}[/tex]finally, solve for x,
[tex]\begin{gathered} \frac{483000}{100}=\frac{x}{97.9} \\ \text{Multiply both sides by 9}7.9 \\ \frac{483000}{100}\cdot97.9=\frac{x}{97.7}\cdot97.9 \\ 472857=x \end{gathered}[/tex]therefore
this year´s profit is $ 472857
I hope this helps you
A club currently has 360 members who pay $350 per month for
membership dues. The club's board members want to increase
monthly revenue by lowering the monthly dues in hopes of
attracting new members. A market research study has shown that
for each $1 decrease in the monthly membership price, an
additional 3 people will join the club. What price should the club
charge to maximize revenue? What is the maximum revenue?
Answers
The price charge is $235 and the maximum revenue is $165675.
What is a parabola?It is a plane curve that is mirror-symmetrical. It is approximately U-shaped. It is a plane curve generated by a point moving so that its distance from a fixed point is equal to its distance from a fixed-line. It is the locus of a fixed point that moves on a plane. It has many important applications. In Mathematics, the parabola plays a crucial role.
Number of members in club = 360
Monthly membership is of $350
For $ 1 price decrease and 3 people joinining
Membership charge will be = 350-x
Members will be 360+3x
Revenue equation will be
R (x) (350-1x)(360+3x)=0
126,000-360x+1050x-3x² =0
126,000+690x- 3x²-=0
This is a parabolic equation. Maximize the function to get
Differentiate to get the parabola vertex
R'(x) = 690-6x
So, 690-6x =0
x =115
Therefore, the price charge is
350-115 = $235
The number of members is
3360+115 = 705
The maximum revenue is given as
$235 × 705=$165675
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What is the Value of log7343?
Answers
Answer: 3.86587352821
Step-by-step explanation: This cannot be solved by hand, you need a calculator for this!
The amount of stain needed to cover a wood surface varies directly as the area of the surface. if 3 pints of stain are needed to cover a square deck with sides 6 feet 8 inches, how many pints are needed to cover a rectangular deck of length 10 feet 8 inches and width 8 feet 3 inches?
Answers
In linear equation, 10 feet and 8 inches will require 4.6 pints.
What are instances of linear equations?
Ax+By=C represents a two-variable linear equation in its standard form. A standard form linear equation is, for instance, 2x+3y=5.Finding both intercepts of an equation in this form is rather simple (x and y).When resolving systems of two linear equations, this form is also incredibly helpful.For 10 feet and 8 inches,
12 inches = 1 foot,
therefore 8 inches = 8/12 foot = 0.6 foot
10 feet 8 inches = 10 + 0.6 = 10.6 feet
6 feet 8 inches required 3 pints
1 foot would have required (3/6.8) pints
10.6 feet will then require (3/6.8)*10.6 = 4.6 pints.
Therefore 10 feet and 8 inches will require 4.6 pints.
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Write and equation for a line with a slope of 3 that passes through the point P(2,−5)
Answers
Answer:
y=3x-11
Step-by-step explanation:
In this question, we will use the point slope form:
Which has the equation:
[tex]y-y_1=m(x-x_1)\\subsitute:\\y+5 = 3(x-2) , (y--5=+5)\\y+5=3x-6\\y=3x-11[/tex]
Hope this helps!
PLEASE HELP!! ILL GIVE YOU BRAINLIEST
Using your equation from step 2d, estimate the GPA of a student who studies for 15 hours a week. Justify your answer.
hours on left side (x) , gpa on right side (y)
Answers
The GPA of a student who studies for 15 hours a week is 2.935.
What is a GPA?
Grade point average, or GPA, is a conventional method of evaluating academic performance in the United States on a scale of 0 to 4.
How to calculate GPA?
To calculate your GPA, divide the total number of grade points earned by the total number of letter-graded units undertaken.
Here,
We have an equation y = 0.164x + 0.475
put x= 15
we get,
y = 0.164* 15 + 0.475
y = 2.935
Hence, The GPA of a student who studies for 15 hours a week is 2.935
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what is the answer to 8.34x0.5
Answers
can you please help me
Answers
The height of the actual building, given the height of the model, can be found to be 1, 455 feet
How to find the height of the actual building?The model is such that every inch of the building on the model is 75 feet of the actual building.
This means that if the height of the building in the model is 19 ² / ₅ inches, then the height of the actual building would be:
= Height of building in model x Scale factor per inch
= 19 ² / ₅ x 75
= 97 / 5 x 75
= 1, 455 feet
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Find the equation of the line shown. Enter your answer in point-slope form.AV15110SX15-10-51015-5-10151
Answers
From the graph given, we are asked to find the equation of line, with our answer in point slope form.
from the graph:
y = 9, x = 10
y1 = 5, x1 = 6
recall, the equation of a line is:
y = mx + b
slope m = y - y1/x - x1
m = 9 - 5/10 - 6
m = 4/4
m = 1
y = 1x + b
y = x + b
using the point slope form:
y - y1 = m(x - x1)
Where:
y = y coordinate of second point
y1 = y coordinate of point one
m = slope
x = x coordinate of second point
x2 = x coordinate of point one.
Therefore, the point slope equation is:
y - 5 = 1(x - 6)
y - 5 = x - 6
Whats the Square root of 32 to the power of 5
Answers
Answer:
2^25/2
Step-by-step explanation:
We express them as a power of 2 using laws of indices
Calculate the following trig ratios. Round to the nearest fourth place. 25 and 45
Answers
Apply the trigonometric functions:
Sin B = opposite side / hypotenuse:
Where:
B : angle
Opposite sid
Got It? Do these problems to find out.
b. y = x-5
c. y = -2x
pls help, thanks!
Answers
Answer:
For b, you just start at (0,-5)(go down 5 on the y-axis), and go one up, one over to the right, and for c, just start at (0,0) and go right one, up 2
Step-by-step explanation:
There are 83 skiers in line to ride the chair lift. If each chair seats 6 people, how many skiers will be on the last chair?
Answers
Answer:
4 people will be on the last chair.
Step-by-step explanation:
60 divided by 5 is 12. There will be 12 full seats. 64 - 60 is 4 so there will be 4 more on the last chair.
Hope this helped!
14 in 8 in 5 in 7 in 9 in 15 in
Answers
To find the area of the whole figure, we can divide it into two rectangles, the smaller rectangle has dimensions of 5 inches by 8 inches.
[tex]A_{small}=5in\times8in=40in^2[/tex]The bigger rectangle has dimensions of 9 inches by 15 inches.
[tex]A_{bigger}=9in\times15in=135in^2[/tex]Then, we add
[tex]A=40+135=175in^2[/tex]Hence, the area of the figure is 175 square inches.It is one question the three images are the options for answers to the question.
Answers
ions
aic
. Find the algebraic
expression:
3 more than the product of 2
and k
•
•
A) 3(2) + k
B) 3k + 2
C) 3 + 2k
D) 2k - 3
Answers
Solve for a side in right triangles
Answers
The length of AC is 2.96 units using trigonometric ratio.
What are the trigonometric ratios?
Sine (sin), cosine (cos), tangent (tan), cotangent (cot), cosecant (cosec), and secant are the six trigonometric ratios. A branch of mathematics called trigonometry in geometry deals with the sides and angles of a right-angled triangle.
Given that angle A = 65° and AB = 7 units.
The base of △ABC is AC, height is BC, and hypotenuses is AB.
Cosine of angle is the ratio of base to hypotenuses.
Thus cos 65° = AC/AB
Substitute AB = 7
cos 65° = AC/7
Multiply both sides by 7:
7 × cos 65° = AC
Putting cos 65° = 0.42261826174
7 × 0.42261826174 =AC
AC = 2.95832783218
AC = 2.96 (nearest hundredth)
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A bakery is selling breakfast platters. A platter of 12 bagels costs $10.80. Additionally, it costs $6.50 for a gallon of coffee.
What is the slope of this situation?
0.11
0.90
6.50
10.80
Answers
The slope of the given situation of selling breakfast platters is 0.90.
Given, the platter of 12 bagels costs $10.80.
The extra cost of $6.50 for a gallon of coffee.
To find the slope of the situation, we convert the situation into the equation of the line.
y=mx+c
here c is the extra cost that is 6.50.
12m=10.80
For 12 bagels , the cost is 10.80, then the slope will be the cost of each bagel.
m=10.80/12
m=0.90
m=$0.90
Therefore, option c 0.90 is the slope of the given situation of the bakery selling the breakfast platter of 12 bagels and a gallon of coffee.
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please help me with this algebra question
Answers
Answer: D.
Hope it helps
Given f(x) = 5x − 7 and g(x) = −4x + 2, what is (f − g)(x)? x − 9 x − 5 9x − 9 9x − 5
Answers
To get (f-g)(x), we're essentially just factoring out x from f(x) and g(x).
-> f(x) - g(x) = x(f-g), and by the properties , x(f-g) is the same as (f-g)(x).
Therefore, (f-g)(x) = 5x - 7 - (-4x + 2) = 5x - 7 + 4x - 2 = 9x - 9.
Answer:
[tex](f-g)(x)=9x - 9[/tex]
Step-by-step explanation:
Given functions:
[tex]\begin{cases}f(x) = 5x-7 \\ g(x) = -4x + 2\end{cases}[/tex]
To find (f - g)(x), subtract function g(x) from function f(x):
[tex]\begin{aligned}(f-g)(x)&=f(x)-g(x)\\&=(5x-7)-(-4x+2)\\&=5x-7+4x-2\\&=5x+4x-7-2\\&=9x-9\end{aligned}[/tex]
Therefore, the solution to the given composite function is:
[tex]9x-9[/tex]If a = [tex]\frac{2 + \sqrt{5}}{2}[/tex], find the value of [tex]a^{2} + \frac{1}{a^{2} }[/tex].
Answers
The value of [tex]a^{2} +\frac{1}{a^{2} }[/tex] if [tex]a=\frac{2+\sqrt{5} }{2}[/tex] is solved to be
5.1How to determine the equationThe equation is solved by substituting for a in the given equation [tex]a^{2} +\frac{1}{a^{2} }[/tex]
[tex]a^{2} +\frac{1}{a^{2} }[/tex]
substituting for a
[tex](\frac{2+\sqrt{5} }{2})=(1+\frac{\sqrt{5} }{2})[/tex]
[tex](1+\frac{\sqrt{5} }{2})^{2} =(1+\frac{\sqrt{5} }{2})*(1+\frac{\sqrt{5} }{2})=1+2\frac{\sqrt{5} }{2} +\frac{5}{4}=\sqrt{5} +\frac{9}{4}=4.48607[/tex]
= 4.8607 + 1/4.48607
= 5.0664
Substituting the value of a in the equation and solving resulted to 5.1
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An element with a mass of 310 grams decays by 6.4% per minute. To the nearest tenth of a minute, how long will it be until there are 100 grams of the element remaining?
Answers
Answer:
17.1
Step-by-step explanation:
Exponential Functions:
y=ab^x
a=starting value = 310
r=rate = 6.4%=0.064
Exponential Decay:
b=1−r=1−0.064=0.936
Write Exponential Function:
y=310(0.936)^x
Put it all together
Plug in y-value:
100=310(0.936)^x
100/310 = 310(0.936)^x/310
Divide both sides by 310
0.322581=0.936^x
\log 0.322581=\log 0.936^x
Take the log of both sides
log0.322581=xlog0.936
Use power rule to bring x to the front
log0.322581/log0.936 = xlog0.936/log0.936
Divide both sides by log(0.936)
17.106221=x
x≈17.1
17.12 will it take until there are 100 grams of the element remaining
What is Equation?Two or more expressions with an Equal sign is called as Equation.
Given that element with a mass of 310 grams decays by 6.4% per minute.
we need to find the time will it be until there are 100 grams of the element remaining
y=abˣ
a=starting value = 310
r=rate = 6.4%=0.064
Exponential Decay:
b=1−r
=1−0.064
=0.936
Plug in these values in the formula
y=310(0.936)ˣ
100=310(0.936)ˣ
Divide both sides by 310
100/310 = (0.936)ˣ
0.322581=0.936ˣ
Apply log on both sides
log 0.322581=xlog0.936
Divide both sides by log0.936
log0.322581/log0.936 = xlog0.936/log0.936
17.106221=x
Hence, 17.12 will it take until there are 100 grams of the element remaining
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Which phrase best describes the transformation(s) of the following graph from the parent quadratic function? f(x)=(x-2)^2+3
Answers
The parent quadratic function is 2 unit right and 3 units up.
Given function is
f(x) = (x-2)² +3
= x² - 2² - 2×x×2 + 3
= x2 - 4 - 4X + 3
= X² - 4X -1
Parent function g(x) = x²
The parent function is shifted to 2 units in right and 3 units up.
Parent function transformations are shown in blue. This is a 1 unit shift down. Mirroring of the x-axis is done functionally by multiplying the superordinate function by the negative function.
A parent function is the simplest function that satisfies the definition of a particular function type. For example, consider linear functions that form a family of functions.
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Disclaimer:- your question is incomplete, Please see below for the complete question.
Which phrase best describes the transformation(s) of the following graph from the parent quadratic function? f(x)=(x-2)^2+3