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albattatasraap5wymy
04.08.2019 •
Mathematics
Cindy saves $420 each month. her monthly salary is $2100. what is the ratio of the amount cindy saves to the amount she earns each month? a) 1: 5← b) 1: 4 c) 2: 3 d) 5: 1 my answer is d.) 1: 5 amount saved to amount earned $420 to $2100 420/2100=1/5 or 1: 5 is my answer correct
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Ответ:
420/2100 = 1/5
answer A)1:5←
Ответ:
420 420
1:5
You got it!!!
♥A.W.E.S.W.A.N.♥
Ответ:
Andre has more money than Bob. If Andre gave Bob $20, they would have the same amount. While if Bob gave Andre $22, Andre would then have twice as much as Bob. How much does each one actually have?
Step-by-step explanation:
Here is the first sentence:
"If Andre gave Bob $20, they would have the same amount."
Algebraically:
1) x − 20 = y + 20.
(Andre -- x -- has the same amount as Bob, after he gives him $20.)
Here is the second sentence:
"While if Bob gave Andre $22, Andre would then have twice as much
as Bob."
Algebraically:
2) x + 22 = 2(y − 22).
(Andre has twice as much as Bob -- after Bob gives him $22.)
To solve any system of two equations, we must reduce it to one equation in one of the unknowns. In this example, we can solve equation 1) for x --
x − 20=y + 20
implies x=y + 40
-- and substitute it into equation 2):
y + 40 + 22=2(y − 22).
That is,
y + 62=2y − 44,
y − 2y=− 44 − 62,
according to the techniques of Lesson 9,
−y=−106
y=106.
Bob has $106. Therefore, according to the exression for x, Andre has
106 + 40 = $146.
I hope this helps u! :D