7x + 3y = -1
x + y = -3.....x = -3 - y
7(-3-y) + 3y = -1
-21 + -7y + 3y = -1
-4y = -1 + 21
-4y = 20
y = 20/-4
y = -5
x + y = -3
x - 5 = -3
x = -3 + 5
x = 2
so ur 2 numbers are : 2 and -5
Answer: change to inches:41 inches tall. 31 inches wide. perimeter:144 inches. perimeter insulation: costs $72
Step-by-step explanation:
Remember you can do anything to an equaiton as long as you do it to both sides
3x-2x=7-5
combine like terms
1x=2
x=2
A. - incorrect, we can see that Jack need add 1 more layer on picture
B. - correct. 8×2=16
C. - correct. cube's side is 1 centimeter, 1×8=8
D. - incorrect, we can see that box is 2 centimeters high
E. - correct
F - incorrect, i counted volume in E
Answer: BCE
Sorry if i have mistakes in text, i'm from russia tho