Answer:
it means to find the undefined number
we should solve for the variable to find the answer to the equation
we solve for the variable by using the elimination method
Step-by-step explanation:
Answer:
B) 42 units squared
Step-by-step explanation:
12 * 7 = 84
84 / 2 = 42
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<em><u>-XxDeathshotxX</u></em>
Answer:
40.49cm²
Step-by-step explanation:
I hope it helps
Answer:
Allison worked 6 hours lifeguarding and 3 hours washing cars.
Step-by-step explanation:
Let
Number of hours Allison worked lifeguarding last week = x
Number of hours Allison worked washing cars last week = y
1. Last week Allison worked 3 more hours lifeguarding than hours washing cars hours, then

<u>Lifeguarding:</u>
$12 per hour
$12x in x hours.
<u>Washing cars:</u>
$8 pere hour
$8y in y hours.
2. Allison earned a total of $96, hence

You get the system of two equations:

Plot the graphs of these two equations (see attached diagram). These line intersect at point (6,3), so Allison worked 6 hours lifeguarding and 3 hours washing cars.