Question

how do i simplify these expressions?
-20 - (-5)*(2^2)
(1/4)^3

Answer 1

Exponent first, evaluate the 2^2 next, then take put together with the fraction to get
- ((-5x4)/(4^3))-20
then
\[-\frac{ -5*4 }{ 64 }-20\]
multiply -5 and 4

\[-\frac{ -20 }{ 64 }-20\]

simplify

\[\frac{ 5 }{ 16 }-20\]

to subtract 20 you need to get the same denominator by finding a number that both 20 and 16 go into then add them together and simplify. If you still can't figure it out let me know.

Answer 2

okay thank you!