If x =( 5a^4) and a =( 2b^3), express x in terms of b.

x = 80 b^12

Step-by-step explanation:

given as

x =(5a^4)          1                         and a =(2b^3)         2

now if we put the value of a in eq 1, then we can write x in terms of b

therefore x= (5(2b^3)^4)

                 = (5(2^4×b^12))

                 = (5(16× b^12))

                 = 80 b^12

d. vertex

step-by-step explanation:

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk