8 True or False: The substitution method is a method of solving systems of equations by adding equations together in such a way that the variables are set aside, one by one.

Answers

Answer 1

Answer: I personally think it's true but I am not for sure

Step-by-step explanation:


Related Questions

Derek analyzed the relationship between the mean number of points scored per game by a basketball team and the team's mean home attendance for several seasons. Derek uses the function y=−7,628+325.5x to describe the data. In the function, x represents the mean number of points scored per game, and y represents the mean home attendance. If the team's mean number of points scored per game is 60 next season, what does the model predict that the team's mean home attendance will be? The model predicts that the mean home attendance will be _____ .

Answers

Answer:

Step-by-step explanación

0.02

When the mean number of points scored per game next season is 60, the model predicts that the mean home attendance will be 11902

The function that predicts the attendance is given as:

[tex]y = -7628+325.5x[/tex]

When the mean number of points scored per game next season is 60, it means that the value of x is 60

i.e. x = 60

Substitute 60 for x in the function

So, we have:

[tex]y = -7628+325.5 \times 60[/tex]

Evaluate the product

[tex]y = -7628+19530[/tex]

Add -7628 and 19530

[tex]y = 11902[/tex]

Hence, the model predicts that the mean home attendance will be 11902

Read more about linear functions at:

https://brainly.com/question/15602982

Help please!!!!! No fake answers

Answers

Answer:      13 itk

Step-by-step explanation:

What is the equation of the line whose y-Intercept is 3 and slope is 1?

Answers

y = x + 3

as x increases by 1, y increases by 1 (Slope)

when x equals 0, y equals 3 (y-intercept)

Simplify the following expression:
3x (7x-4)-(x-8)

Answers

Answer:

=21x2−13x+8

Step-by-step explanation:

=3x(7x−4)+−1(x−8)

=3x(7x−4)+−1x+(−1)(−8)

=3x(7x−4)+−x+8

Distribute:

=(3x)(7x)+(3x)(−4)+−x+8

=21x2+−12x+−x+8

Combine Like Terms:

=21x2+−12x+−x+8

=(21x2)+(−12x+−x)+(8)

=21x2+−13x+8

Answer:

[tex]=21x^{2} -13x+8[/tex]

Step-by-step explanation:

Traci spent $1.19 on a pack of gum and $0.95 on lip balm.

Part A
What was the total amount Traci spent? Use the model to help you.

This image shows 3 hundredths grid next to each other. The first grid is entirely shaded in blue, second grid has 0.19 nineteen hundredths shaded in blue and remaining 0.81 eighty one hundredths shaded in yellow and third grid has 0.14 fourteen hundredths shaded in yellow and remaining are empty.

Enter your answer in the box.

$

00:00

Part B
Select words from the drop-down menus to explain how the model helps find the sum.

The number of full grids shaded is the number of . The number of small squares shaded in the grid is the number of .

Answers

She spent a total of $2.14.

Answer:

A: she spent a total of $2.14

and im sorry beb but i cant really help on part b but i tried for part a

BUT GOOD LUCK AND HAVE A WONDERFUL DAY

-Ary

Plz help i will mark branliest


Writing Equations From Two Points & Point-Slope Form

Answers

Answer:

problem #2:

y - 4 = 2 ( x + 1) , y - 1 = -1/3x ( x - 2)

problem #3:

slope: 2/3  point: -2, 4

slope: -3  point: -5, -1

Step-by-step explanation:

good luck!

find the larger of two consecutive integers,x, if the sum of the smaller and larger is -9. write an equation and solve

Answers

Answer:

-4

Step-by-step explanation:

Solve for X then Solve for angles 7X-40 and 2X+60

Answers

Answer:

X = 20

Angles are both equal to 100 degrees

Step-by-step explanation:

Assuming that 7x-40 = 2x +60

1. Order of Operations

2. 5x = 100

3. divide 100 by 5

4. x = 20

5. Plug 20 into both equations

6. 7(20) - 40 = 100

   2(20) + 60 = 100

7. Both angles are equal to 100 degrees

Solve: 3x = 0.5x^2
x = -6 or x = 0

x = -4 or x = 3

x = -2 or x = 1.5

x = 0 or x = 6

Answers

Answer:

it the 3 one i am sure hope it helps

2x-1/3x+1=6x-1/9x-3​

Answers

The answer is x=3

So c is 3

Write each decimal as a fraction or mixed number in simplest form 0.125

Answers

Answer:

1/8 as a fraction

Step-by-step explanation:

Answer: mixed number:0 1/8 or just 1/8

Step-by-step explanation:

Susan bought a pair of jeans for $20.95 and a shirt for $11.50. She paid with $40.00. How much was her change?

Answers

Her change is $7.55 :)

Answer:

$7.55

Step-by-step explanation:

First, add the prices to get the grand total.

$20.95 + $11.50 = $32.45

Now, subtract that from the total that was paid.

$40.00-$32.45 = $7.55

At a dinner, the meal cost $22 and a sales tax of $1.87 was added to the bill.

How much would the sales tax be on a $66 meal?
What is the tax rate for meals in this city?
PLEASE HELP

Answers

Answer:

$5.61 if I am not mistaken

Step-by-step explanation:

Let me know if I am wrong.

Sorry if I am.

Answer:

$5.61

Step-by-step explanation:

What is the equation for a circle with the center, (0,0) and a radius of 4?

Answers

Answer:

(X-x0)^2 +(y-y0)^2= r^2

R=4

R^2=16

(X-0)^2+(y-0)^2=16

Chang wants to know if he is improving

Answers

Answer:

Yes he is

Step-by-step explanation:

Answer:

Yes! he is

Step-by-step explanation:

:)

Write an equation that shows the number
of teaspoons of chili powder (y) per
teaspoons of cumin (x).

Answers

How am I sophomore to know this I need help tho

Answer:

y=4x

Step-by-step explanation:

Mr. Olivera wants to buy a bicycle that costs $184 for each of his two children. He plans to save the $9 he usually spends for lunch to buy the bikes. About how many days must he save his lunch money to have enough to buy the bicycles? Will the actual number of days be more or less than the estimate?

Answers

Answer:

19 days its 180 y 20 days its 189

(Hope this helped in some kind of way and can i get brainlest? okay bye have a blessed day!)


The actual number of days required to buy a bicycle will be 20 days.

What is inequality?

Inequality is defined as an equation that does not contain an equal sign. Inequality is a term that describes a statement's relative size and can be used to compare these two claims.

Mr. Olivera wishes to purchase a $184 bicycle for each of his two children. He intends to save the $9 he normally spends on lunch to purchase the bikes.

Let 'x' be the number of days. Then the inequality is given as,

9x ≤ 184

Simplify the equation, then we have

9x ≤ 184

x ≤ 184 / 9

x ≤ 20.44


The actual number of days required to buy a bicycle will be 20 days.

More about the inequality link is given below.

https://brainly.com/question/19491153

#SPJ2

which shows the use of the associative property?

Answers

Answer:

The correct answer is Option 2:

[tex]7+(\frac{1}{5}+n) = (7+\frac{1}{5})+n[/tex]

Step-by-step explanation:

Associative property consists of three quantities. Associative property for addition states that the result of adding three numbers will be same no matter what the order of addition is.

Let a,b and c be three numbers

Then associative property can be stated as:

[tex]a+(b+c) = (a+b)+c[/tex]

Now looking at the options it can be observed that the following choice shows the associative property

[tex]7+(\frac{1}{5}+n) = (7+\frac{1}{5})+n[/tex]

Hence,

The correct answer is Option 2:

[tex]7+(\frac{1}{5}+n) = (7+\frac{1}{5})+n[/tex]

Answer:

its B

Step-by-step explanation:

i got it right on Edg

A line segment with A B C at points

Answers

Midpoint of a line segment.

if x -1/7,evaluate x²+1/x²​

Answers

Answer:

[tex]given \: x = - \frac{1}{7} [/tex]

[tex]x {}^{2} + \frac{1}{x {}^{2} } [/tex]

[tex]( - \frac{1}{7} ) {}^{2} + \frac{1}{ ( - \frac{1}{7} ) {}^{2} } [/tex]

[tex] \frac{1}{49} + \frac{1}{ \frac{1}{49} } [/tex]

[tex] \frac{1}{49} + \frac{1 \times 49}{1} [/tex]

[tex] \frac{1}{49} + 49[/tex]

[tex] \frac{2402}{49} \: or \: 49.02[/tex]

The production rate of a steel factory is declining due to old machinery. Over the last eight days production has dropped by 1.2 tons. What is the average rate of change in steel production over the eight days? Express the answer in tons per day.

A.
+1.2
B.
-1.2
C.
+0.15
D.
-0.15

Answers

Answer:

I think is A srry if im wrong :c

Step-by-step explanation:

Answer:

-0.15

we want to divide the amount of tons that was lost over the course of 8 days, in which the answer is 1.2 divided by 8 = 0.15, we then get -0.15 because they lost tons

I hope this helps

What is the product of 417.2 x 0.64?

Answers

Answer:

267.008

Step-by-step explanation:

Answer:

267.008

Step-by-step explanation:

27/22 as a decimal rounded to the nearest hundredth

Answers

Answer:

1.23

Step-by-step explanation:

27/22 = 1.227 --> 1.23 (7>5 so the number rounds up)

Which is the definition of a ray?

a part of a line that has one endpoint and extends indefinitely in one direction
the set of all points in a plane that are a given distance away from a given point
lines that lie in the same plane and do not intersect
a part of a line that has two endpoints

Answers

Answer:

a part of a line that has one endpoint and extends indefinitely in one direction

Step-by-step explanation:

a ray has one endpoint, then has an arrow going indefinitely in one direction.

Answer:

a

Step-by-step explanation:

What is the answer?

Answers

Answer:

clockwise

Q= (5,-2)

R= (-1,-3)

S= (0,0)

T= (3,-2)

counterclockwise

Q= (-5,2)

R= (1,3)

S= (0,0)

T= (-3,-2)

Step-by-step explanation:

this might not be right im a little rusty on my transformations but here goes nothing.

i dont know if this is a clockwise or a counter clockwise rotation so ill do both options.

clockwise (x,y) - (y,-x)

q=(2,5) - (5,-2)

r=(3,-1) - (-1,-3)

s=(0,0) - (0,0)

t=(-2,3) - (3,2)

counterclockwise (x,y) - (-y,x)

q=(2,5) - (-5,2)

r=(3,-1) - (1,3)

s=(0,0) - (0,0)

t=(-2,3) - (-3,-2)

(7.8 x 10) x (1.0 10) = ?
Scientific notation

Answers

Answer:

780

Step-by-step explanation:

7.8 x 10 is 78. 1.0 x 10 is 10. Multiply both and get 780

write an equation in slope-intercept form of the line that passes through the given points (-4,-2) (8,-2)

Answers

Answer:

y=-2

Step-by-step explanation:

First, find the slope using the slope formula: m=y2-y1/x2-x1

Plug the numbers into the equation and get 0

Using the slope and one of the coordinates, put the equation into point-slope form: y-y1=m(x-x2)

y+2=0(x+4)

Distribute and simplify to get the final answer.

y+2=0+0

y=-2

So you would graph the two points to make the line, then find the slope by doing rise/run. The slope equation is y=mx +b and m is slope so u would plug that in. Then you would find the y-int / b by finding the point on the line where it crosses the y acis/ when x is zero! There u hv it!

HELP HURRRYYY!!!! If (72)x = 1, what is the value of x? Explain your answer.

Answers

Answer:

1/72

Step-by-step explanation:

72 times x equals 1

to find singular value of x, divide both sides by 72.

x=1/72

Answer:

1/72

Step-by-step explanation:

PLS HELP I WILL MARK BRAINLIEST!!!!!!

Answers

Answer:

Number 3 . 5x-8y=-4

Step-by-step explanation:

Which statement is true about the graphs of the two lines y=-x+2 and y=-x- ?
O The lines are perpendicular to each other because - and - are opposite reciprocals of each other.
The lines are perpendicular to each other because 2 and - 1 are opposite reciprocals of each other.
O The lines are neither parallel nor perpendicular to each other because - and are not opposite reciprocals
of each other.
The lines are neither parallel nor perpendicular to each other because 2 and - 3 are not opposite reciprocals of
each other.

Answers

Answer:

The correct option is Option C

Step-by-step explanation:

We are given the lines: [tex]y=-\frac{4}{5}x+2 \ and \ \ y=-\frac{5}{4}x-\frac{1}{2}[/tex]

The lines are perpendicular if they have opposite slopes i,e [tex]m_1=-\frac{1}{m_2}[/tex]

In line 1 the slope is [tex]-\frac{4}{5}[/tex] (Comparing with slope-intercept form [tex]y=mx+b[/tex] we get the value of m=-4/5)

In line 2 the slope is [tex]-\frac{5}{4}[/tex] (Comparing with slope-intercept form [tex]y=mx+b[/tex] we get the value of m=-5/4)

The opposite reciprocal of -4/5 is 5/4  

So, the lines are not perpendicular as their slopes are not opposite reciprocal of each other.

If the lines are parallel there slope must be same. Hence lines are not parallel as well.

So, The correct option is Option C

Answer:

c

Step-by-step explanation:

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