Answer:
1-8×3=24
2-9×4=36
3-11×7=77
4-7×3=21
but don't forget to put units and put square
#1=24 #2=36 #3=77 #4=21
Step-by-step explanation:
Hope this helps
Use PEMDAS
Parentheses
Exponents
Multiplication (L-R)
Division (L-R)
Addition (L-R)
Subtraction (L-R)
(30-9+3)+9
(21+3)+9
24+9
33
33 is your answer
The lengths of the sides are 15 x 17 x 19
Perimeter = 15 + 17 + 19
51 = 51
i think the answer is letter b or letter d
