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timofeeve [1]
3 years ago
9

Mike, a Salvation Army bell ringer, has 20% as many quarters as nickels in his cup. If Mike has $6.00 in quarters and nickels, h

ow many nickels does he have?
Mathematics
1 answer:
weeeeeb [17]3 years ago
3 0
It is 60% which is 3$ and 40% of quarters
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What expression is the simplified form of “-12+5a-a-6a+8a+8+3a”? Please explain your reasoning.
kramer

Combine like terms:

-12 + 5a - a - 6a + 8a + 8 + 3a

-12 + 5a - a - 6a + 8a + 8 + 3a

5a - a = 4a

4a - 6a = -2a

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Answer

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Lelu [443]

Answer:

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Step-by-step explanation:

Let Q = the number of quarters and D = the number of dimes.

Then:

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2) 0.25Q+0.1D = $7.75 "...she had a total of $7.75."

Rewrite equation 1) as: D = 40-Q and substitute into equation 2).

2a) 0.25Q+0.1(40-Q) = 7.75 Simplify the left side.

 

2b) 0.25Q+4-0.1Q = $7.75 Subtract 4 from both sides.

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2d) 0.15Q = 7.75 Divide both sides by 0.15

2e) Q = 25 and:

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D = 40-25

D = 15

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3 years ago
What’s the axis of symmetry?
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Answer:

x = -1

Step-by-step explanation:

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The vertex is the part of the line where it "turns" around and starts going the other way. So vertex of this line is at (-1, 3).

Therefore, the axis of symmetry is at x = -1. This is since the function is pointing either up/down, and any value that is x = _ is a vertical line.

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Answer:

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<em>Step-by-step explanation:</em>

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