ANSWER:
a. y=3x+2
b. y=-1/2x-1

find the y intercepts that fit with the coordinates and for a parallel line the slope stays the same, while for a perpendicular line the slope flips and turns into the opposite symbol.

4 0

3 years ago

Question: 5 ( x +20)= 7x +30

mel-nik [20]

Answer:35

Simplifying

5(x + 20) = 7x + 30

Reorder the terms:

5(20 + x) = 7x + 30

(20 * 5 + x * 5) = 7x + 30

(100 + 5x) = 7x + 30

Reorder the terms:

100 + 5x = 30 + 7x

Solving

100 + 5x = 30 + 7x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-7x' to each side of the equation.

100 + 5x + -7x = 30 + 7x + -7x

Combine like terms: 5x + -7x = -2x

100 + -2x = 30 + 7x + -7x

Combine like terms: 7x + -7x = 0

100 + -2x = 30 + 0

100 + -2x = 30

Add '-100' to each side of the equation.

100 + -100 + -2x = 30 + -100

Combine like terms: 100 + -100 = 0

0 + -2x = 30 + -100

-2x = 30 + -100

Combine like terms: 30 + -100 = -70

-2x = -70

Divide each side by '-2'.

x = 35

Simplifying

x = 35

Hope it helps. Please tell me if im correct

7 0

3 years ago

Read 2 more answers

NEED HELP WHAT ARE THSES TWOO!!

lozanna [386]

Answer:
No and No

(I didn’t actually say no, I mean like both answers are no.)

I hope I was right.
Have a nice day

8 0

3 years ago

Kinu has 7 memory sticks that contain data from his computer. Some of the me

ra1l [238]

Solving the system of equations, it is found that x = 3, that is, there are 3 128 MB memory sticks.

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We want to solve for x, thus, in the first equation, we write y as a function of x, that is:

$y = 7 - x$

Replacing in the second equation:

$128x + 512(7 - x) = 2432$

$128x + 3584 - 512x = 2432$

$384x = 1152$

$x = \frac{1152}{384}$

$x = 3$

x = 3, that is, there are 3 128 MB memory sticks.

A similar problem is given at brainly.com/question/24823220

6 0

2 years ago