The system of equations is:
x = 2y
x*$10 + y*8 = $84
Solving it, we see that he worked 3 hours landscaping and 6 hours washing cars.
<h3>
How to write the system of equations?</h3>
First, we need to define the variables:
- x = number of hours washing cars.
- y = number of hours landscaping.
We know that Alexander worked twice as many hours washing cars as he worked hours landscaping, then:
x = 2y
We also know that he earned a total of $84, then:
x*$10 + y*8 = $84
So the system of equations is:
x = 2y
x*$10 + y*8 = $84
To solve it, we just replace the first equation into the second one:
(2y)*$10 + y*8 = $84
y*$28 = $84
y = $84/$28 = 3
So He worked 3 hours landscaping, and:
x = 2*y = 2*3 = 6
6 hours washing cars.
If you want to learn more about systems of equations:
brainly.com/question/13729904
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Two numbers, one being 12, are multiplied to equal 48.
Therefore, the answer is B) 12x = 48
Answer:
J = 33
Step-by-step explanation:
43 - 2k = 33
43 - 10 = 33
33 = 33
The answer would be 0.381.
Answer:
The Answer is 74.3891 Kilograms
Step-by-step explanation:
In order to convert pounds to kilograms, You must divide the number by 2.2046.
