I pretty sure it’s SAS(side angle side) but I might be wrong.
P=w+l
42=(3x+7)+(2x-1)
42=5x+6
36=5x
x=36/5
plug in x
w=3(36/5)+7
w=28.6
l=2(36/5)-1
l=13.4
7(1-8n) = 7 - 56n Work - 7 - 7 x 8n= 7 - 56b
-5(1+2k)-8(-4+5k) = 27 - 50k Work - -5-10k+32-40k = 27-10k-40k = 27-50k
we know that
A relationship between two variables, x, and y, represent a direct variation if it can be expressed in the form 
in this problem we have

so
<u>Find the value of the constant k</u>

substitute


the equation is equal to

<u>Find the value of y when
</u>
substitute the value of x in the equation


therefore
<u>the answer is</u>

Answer:
20
Step-by-step explanation:
just did ssignment