6m+23
You have to use distributive property, so 15x2=30 and 2x3m= 6m. You then subtract 30 from 7 and get 23.
Answer:
unsure but i think the first one
Step-by-step explanation:
Answer:
y= -2x+4
Step-by-step explanation:
P=2l+2w
W=7+3l
So substitute into the original equation
P=2l + 2(7+3l)
78=2l +14 + 6l
-14 -14
—————-
64=8l
8=length
W=7+3l
= 7+3(8)
=7+24
=31
Check your work
Perimeter=8+8+31+31
=78
Hope this helps
Answer:
10x + 8y - 2
Step-by-step explanation:
