Question

Find the value of the expression below for r = 4 and t = 2
t^3 - r + 20 divided by r

Answer 1

The value of the expression
`t^3-r+(20)/(r)` is, 9

Explanation:

Given: The expression
`t^3-r+(20)/(r)`

Substitute the value of r=4 and t=2 in above expression to find its value;

`t^3-r+(20)/(r) = (2)^3-4+(20)/(4)`

Cube: the cube of a number t is its third power, the result of the number multiplied by itself twice. i.e,
`t^3 = t * t * t`

Now, solve further we have;

`(2)^3-4+(20)/(4) = 8 -4+(20)/(4)`

Further, divide the number 20 by 4 we get the result 5 ;

⇒ 8-4+5 = 4+5 =9

Therefore, the value of the expression
`t^3-r+(20)/(r)` is, 9.