Evaluate:

Question

8k − h^3 + 8y ÷ r

when k=4, h=2, y=5, and r=8
*
71.625
31
29
14.625

Answer 1

To evaluate the expression, substitute the given values for k, h, y, and r into the expression:

8(4) - 2^3 + 8(5) ÷ 8
= 32 - 8 + 40 ÷ 8
= 24 + 5
= 29

Therefore, the value of the expression is 29.

So, the correct answer is 29.

Answer 2

Identify the sum of this equation: r + 6 = 20
*
r
+
6
20

Answer 3

To solve the equation r + 6 = 20 for r, follow these steps:

r + 6 = 20
Subtract 6 from both sides to isolate r:
r = 20 - 6
r = 14

Therefore, the sum of the equation r + 6 = 20 is:
14 + 6 = 20

So, the sum is 20.

Answer 4

Which of the following is an expression?
*
r
r^2
r + 5
r + 5 = 9

Answer 5

Among the given options, the only one that qualifies as an expression (a combination of variables, numbers, and operations that represents a value) is:

r + 5

The other options are:
- r (single variable, not an operation or combination)
- r^2 (an algebraic expression representing squaring the variable r)
- r + 5 = 9 (an equation, not an expression)

Therefore, the expression is r + 5.

Answer 6

What is the coefficient in this expression:

9x^2 + 2^3 - 5

*
9
2
x
- 5

Answer 7

The coefficient in an algebraic expression is the number that is multiplied by the variable.

In the given expression, 9x^2 + 2^3 - 5, the coefficient of the term 9x^2 is 9.

Therefore, the coefficient in the expression 9x^2 + 2^3 - 5 is 9.

Answer 8

Write 4 x 4 x 4 using exponents.
*
3 x 4
64
4^3
12

Answer 9

4 x 4 x 4 can be written using exponents as:

4^3

Therefore, the expression 4 x 4 x 4 can be written as 4^3.

Answer 10

Evaluate 3^4 (3 raised to the 4th power)
*
12
81
64
7

Answer 11

To evaluate 3 to the 4th power (3^4), you multiply 3 by itself 4 times:

3^4 = 3 x 3 x 3 x 3
3^4 = 81

Therefore, the value of 3^4 is 81.

So, the correct answer is 81.