Question

Question 5 of 21

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This test: 100 point(s) possible
This question: 5 point(s) possible
An electrician purchased 9 dimmer switches at $30 each and received a $8 credit for each of the five duplex receptacles she returned. Write out a mathematical
statement that gives the amount of money she spent, then calculate this total.
Select the correct choice below and fill in the answer box to complete your choice.
(Simplify your answer.)
OA. 9×$30+5x$8=$
OB. 9x$30-5x$8=$
OC. (9-5) x ($30-$8)-$
OD. (9+5)×($30+$8) = $
Submit test

Answer 1

B

Explanation:

she purchased 9 units at $30 each (= she spent 9×$30), and she received $8 credits for each of 5 units she returned.

so, the total money spent was

9×$30 - 5×$8 = $270 - $40 = $230

because we are looking at the money spent, any credit is then entering the calculation as '-', because it reduces the amount of money spent.

Answer 2

OB. 9x$30-5x$8 = $

Calculating this expression:
9 x $30 = $270
5 x $8 = $40
$270 - $40 = $230

So, the electrician spent $230