H = m/y + z/y - d
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v
Answer:
Step-by-step explanation:
Let's call lifeguarding L and car washing W. In order to write a system, we need to first separate the NUMBER of hours worked from the MONEY earned, because they are very different things.
If she works 10 hours, that is the number of hours worked between both jobs. Therefore, the equation for the NUMBER of hours worked is
L + W = 10.
If she earns $13 an hour lifeguarding, the expression for that is 13L; if she earns $12 an hour car washing, the expression for that is 12W. The MONEY she earned together by doing both those jobs is
13L + 12W = 124
There you go!
Just divide 13 by 33.
So, 13 ÷ 33 = 0.3939393939
9x8-[18+(15+60/4)]+10
First, solve the inner parentheses:
(15+60/4) 60/4= 15
15+15= 30
Next, add the 18 and the 15, since they are still inside the parentheses:
18+15= 33
9×8-(33)+10 Is what we're left with.
Multiply: 9×8= 72
72-(33)+10
Subract: 72-33= 39
Add: 39+10= 49
The simplified answer is 49.
<span>In order to find the solution, we must solve for 'x' in the initial equation. What we do to one side of the equation to isolate 'x', we must do to the other. If we subtract 5x from both sides were are left with x - 2 = 3. We then add 2 to both sides to completely isolate 'x' and are left with x = 5. This is in the replacement set and is one of the provided solutions, D.</span>