Answer:
Squares:
1 is 12.4in
6.2 x 6.2 = 12.4
2 is 21 in
5 1/2 x 4 = 21
Triangles:
1 is 48 in
16+16+16=48
2 is 21 in

hoped that helped:P
Step-by-step explanation:
Step-by-step explanation:
A. b x 30 = 7E. b x 7 =30C. b = 30 + 7
The answer is number 4. No, he is not correct and the correct answer is: 10r + 10