Question

hat is the value of the expression when a = 5 and b = 3? 4a^2 5b^3 A. 55 B. 74 C. 81 D. 145

Answer 1

@jim_thompson5910 pls help

Answer 2

@jim_thompson5910 pls help

Answer 3

Replace 'a' in 4a^2*5b^3 with 5

so we have 4*5^2*5b^3

Answer 4

also replace b with 3 to get 4*5^2*5*3^3

I'll let you finish

Answer 5

okay 100-45=55?

Answer 6

oh the original expression is \[\Large 4a^2 - 5b^3\] ??

Answer 7

right

Answer 8

I'm not sure how you got 45

Answer 9

oh I see. You did 3*3 = 9 when you should have done 3^3 = 3*3*3 = 27

Answer 10

try it again

Answer 11

its 55 thanks tho