You earn $7.50 per hour at a fast food restaurant. You earned $123.75 last week. How many hours did you work last week?

1 answer:

3 0

I believe you would need to divide 123.75 by 7.50.

The equation would look something like this:
7.50x=123.75
Where x = # of hours worked
123.75 / 7.50 = 16.5
so x = 16.5
You worked for 16.5 hours

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A physics exam consists of 9 multiple-choice questions and 6 open-ended problems in which all work must be shown. If an examinee

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Answer:

720 ways

Step-by-step explanation:

Generally, combination is expressed as;

$^{n} C_{r} = \frac{n!}{r!(n-r)!}$

The question consists of 9 multiple-choice questions and examinee must answer 7 of the multiple-choice questions.

⇒ ⁹C₇ $=\frac{9!}{7!(9-7)!}$

$=\frac{9!}{7!(2)!}$

= 36

The question consists of 6 open-ended problems and examinee must answer 3 of the open-ended problems.

⇒ ⁶C₃ $=\frac{6!}{3!(6-3)!}$

$=\frac{6!}{3!(3)!}$

= 20

Combining the two combinations to determine the number of ways the questions and problems be chosen if an examinee must answer 7 of the multiple-choice questions and 3 of the open-ended problem.

⁹C₇ × ⁶C₃

= 36 × 20

= 720 ways

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Solve for x: 2|x − 3| + 1 = 7 (5 points)

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