Question

Majorie evaluated the expression 3x+2 for x=5 as shown: 3x+2=35+2=37 What was Majorie's mistake? What is the correct value of 3x+2 for x=5?

Answer 1

17

Explanation:

Given:

The given expression is.

`3x+2`

We need to solve the given expression for
`x = 5`.

Solution:

Rewrite the expression as.

`f(x)=3x+2`

Substitute x = 5 in above expression.

`f(5)=3(5)+2`

`f(5)=3* 5 + 2`

Now we multiply 5 with 3.

`f(5)=15+2`

Now we add right side terms.

`f(5)=17`

Therefore, The correct value of given expression is
`3x+2=17` for
`x=5`.