Question

What is the value of the expression below when z = 2?

3z *3 - 5z + 9

Answer 1

Answer: 39

Explanation:

Before substituting 3 for z, simplify the expression.

`\bf{3z*3-5z+9}`

`\bf{15z-5z+9}`

`\bf{10z+9}`

We can now plug in 3 for x:

`\bf{10(3)+9}`

`\bf{30+9}`

`\bf{39}`

Therefore, the answer is 39.

Answer 2

23

Explanation:

`z^(3)` = 8,

3
`z^(3)` = 24,

3z *3 - 5z + 9

= 24 - 5x2+9

= 24-10+9

= 23