^70 POINTS can someone help me with this i rlly need it

The length of a rectangle is 1 inch less than twice its width, and its perimeter is 40 inches. Find the width of the rectangle.

7 in.
13 in.
14 in.

If the second equation is multiplied by 5 and then the equations are added, the result is _.

x + 5y = 3
2x - y = -2

9x = 13
11x = -7
9x = -7

For the following system, use the second equation to make a substitution for x in the first equation.

x + 3y = 5
x + 7 = 2y

What is the resulting equation?

2y + 2x + 3y = 5
2y + 7 + 3y = 5
2y - 7 + 3y = 5

Graph the following system of equations. Click on the graph until the correct one appears.

y > -x + 1
y ≤ 2x - 3

Find A B if A = {3, 6, 9, 12} and B = {2, 4, 6, 8, 10}.

{6}
{2, 3, 4, 6, 8, 9, 10, 12}

Choose the correct mathematical translation for the given statement.

She is at most twenty years old.

x 20
x ≥ 20

1) 7 in

2) 11x=-7

3)2y - 7 + 3y = 5

4) i DONT'KNOWN

Step-by-step explanation:

1)

step 1

the length of the rectangle is 1 inch less than twice its width ( in other words , you have to subtract  1 to twice the width to get the length)

Let

L represents the length

W represent the width

Hence

Twice width= 2w

Now , replace

L=2w-1 equation (1)

Also

The perimeter =40 inches

Step 2

Solve for w

Replace equation (1) in equation (2)

so ,the width is 7 in.

2) Given the equations

The  first step is to multiply the second equation by 5 (both sides of the equation)

Next is to add both equations

x+5=3 +10x-5y=-10 = 11x+0y=-7

The result is 11x=-7

3)

To make a substitution for x using the second equation in the first equation you :

1. solve for x the second equation

Subtract 7 in both sides of the equation:

2.Substitute the x in the first equation for the value of x you get in step 1 :

PLEASE MARK ME AS BRAINLIEST

true

step-by-step explanation:

y=3x+4

step-by-step explanation:

given the points a(0,4) and b(-4, -8)

eqn of line ab: (y-4)/(x-0)=(-8-4)/(-4-0)

(y-4)/x=-12/-4=3

y=3x+4