Question

Can you pls help me with this question thank you

Answer 1

The expression we have is:

`9d-4f`

And we are given values for d and f:

`\begin{gathered} d=9 \\ f=8 \end{gathered}`

The first step will be to substitute these values into the expression

Step 1. Substituting d=9 and f=8 into the given expression:

`9d-4f=9(9)-4(8)`

Step 2. Simplify the multiplications.

9(9) is equal to 81 and 4(8) is equal to 32, thus:

`9d-4f=81-32`

Step 3. The last step is to subtract 81-32:

`9d-4f=49`

This result is shown in option b.

Answer:

b) 49