QuestionEvaluate $7a - 5b$ for $a = 4$ and $b = 3$ . Options: 1, 13, 21, 69.

Studdy Solution

STEP 1

Assumptions1. The expression to evaluate is $7a -5b$ . The value of $a$ is43. The value of $b$ is3

STEP 2

We need to substitute the given values of $a$ and $b$ into the expression. $7a -5b =7(4) -5()$

STEP 3

Now, perform the multiplication operations.
$7a -5b =28 -15$

STEP 4

Finally, subtract15 from28 to evaluate the expression.
$7a -b =28 -15 =13$ So, $7a -b$ equals13 when $a=4$ and $b=3$ .

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