solve the system by Substitution 4x+4y=-4 y=-7x-7

{-1, 0}

Explanation: Since y = -7x - 7, we can replace the y in our first equation with

a -7x - 7 and our first equation now reads 4x + 4(-7x - 7) = -4.

To solve this equation, first distribute the 4 through the parenthses.

So we have 4x - 28x - 28 = -4.

Now simplify the left side to get -24x - 28 = -4.

Adding 28 to both sides, we have -24x = 24.

Dividing both sides by -24, we find that x = -1.

To find y, plug a -1 back into either equation.

So we have y = -7(-1) - 7 or y = 0.

Our final answer is {-1, 0}.

x= -1,

y=0

Step-by-step explanation:

answer: .64

step-by-step explanation

set up the formula for standard deviation for this set of numbers, then simplify

what are you trying to solve here

step-by-step explanation: