Answer:
81
Step-by-step explanation:
use pemdas
8(8 + X) = 16
64 + X = 16
-64 -64
X = -48
<u>Answer:</u>
- 31 mm² is the surface area.
<u>Step-by-step explanation:</u>
<u>We know that:</u>
- Surface area of triangle = 3(1/2 x 4 x 4) + (1/2 x 4 x 3.5)
<u>Work:</u>
- 3(1/2 x 4 x 4) + (1/2 x 4 x 3.5) mm²
- => 3(2 x 4) + (2 x 3.5) mm²
- => 24 + 7 mm²
- => 31 mm²
Hence, <u>31 mm² is the surface area.</u>
Hoped this helped.
You add them up to see that it is in fact greater...
12.6+3.1+5.4=
21.1
D. 5 is the answer to this question, I hope my answer was of help, message me if more help is needed