In each of the problems, one of the equations is solved for y. Just plug in what y is equal to into the other equation.
1.) Plug -3 in for y.
-3 = 7x - 10
7x = 7
x = 1
2.) Plug -8 in for y.
-8 = -2x - 12
-2x = 4
x = -2
9.) Plug -8x in for y.
2x + 4(-8x) = 0
2x - 32x = 0
-30x = 0
x = 0
10.) Plug 2x in for y.
6x + 7(2x) = 20
6x + 14x = 20
20x = 20
x = 1
X+(x+1)+(x+2)=72
3x=72-3
3x=69
X=23
23+24+25= 72
Answer:
9/10
Step-by-step explanation:
to do this you would want to find a common denominator. then to divide fractions you would want to apply the keep change flip rule. keep the first fraction. change the division sign to multiplication and flip the fraction. then proceed to multiple. then you have your answer.
Answer:
4%
Step-by-step explanation:

A = final amount
P = initial amount
r = interest rate per time period
n = number of times compounded per time period
t = number of time period
A = 3932.82
r = what we want to find
n = 2
t = 6

divide both sides by 3101 to isolate the exponent and its parts

put both sides to the power of (1/12) to help isolate the variable

subtract 1 from both sides to isolate the variable and its coefficient

multiply both sides by 2 to get r

r ≈ 0.04 = 4%
Answer: 37cm
Step-by-step explanation: 5cm + 13cm + 7cm + 12cm = 37cm