Question

Help. Pictures are attached,

Answer 1

answer to 4 is 4 in
explanation:
1/2 3b(squared) = 24
3b(squared)=48
b(squared)=16
b=4 (negative excluded as it's a length)
Answer to 5 is 22
explanation:
x(squared) + z = 103
x(s..) = 103-z
9 or -9 (s....) = 103-z
81= 103-z
z= 22