This can vary, some shapes have different area formulas, here are some basic formulas I can give you:
Circle: A =


Triangle: A =

Square: A =

Rectangle: A = L*W
<span>7(B + 3) + 2B
= 7B + 21 + 2B
= 9B + 21
hope it helps</span>
Answer:
180
Step-by-step explanation:
240*75%=240*0.75=240*(3/4)=240/4*3=60*3=180
Answer:
14
Step-by-step explanation:
perimeter = sum of all sides
so 75- (15+10+27+9)
= 75- 61
= 14
You would use matrix.
r+a+d=85
0r- 3a+d=0
r- a+0d=5
r=21
a=16
d=48
Rita sent 21 text messages, Ali sent 16 text messages, and Deandre sent 48 text messages.