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AfilCa [17]
3 years ago
14

Nilda has $25 in her savings account. She plans to save 6.50 per week from her salary. Iona has $50 in her account but can save

$13 per week from her paycheck. Nilda gets paid twice a month, but Iona only gets paid once a month. How many weeks will it take before the amount in each savings account is the same?
Mathematics
1 answer:
Tpy6a [65]3 years ago
6 0

Answer:

3

Step-by-step explanation:

$25×6.50=152.5

50÷13=0.26

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A radiator contains 10 quarts of fluid, 30% of which is antifreeze. How much fluid should be drained and replaced with pure anti
prohojiy [21]

ANSWER

Find out the how much fluid should be drained and replaced with pure antifreeze so that the new mixture is 60% antifreeze .

To proof

let us assume that the fluid should be drained and replaced with pure antifreeze be x .

As given

A radiator contains 10 quarts of fluid, 30% of which is antifreeze.

Now write 30% in the decimal form

= \frac{30}{100}

Now write 60% in the decimal form

= \frac{60}{100}

After  drained and replaced the fluid with pure antifreeze than the quantity becomes = ( 10 - x )

The quantity of  antifreeze is

= \frac{30\times (10 - x)}{100}

The fluid should be drained and replaced with pure antifreeze so that the new mixture is 60% antifreeze .

than the equation becomes

= x + \frac{30\times ( 10 - x )}{100} = \frac{60\times10}{100}

solyving

100x +300 - 30x = 600

70x = 300

x = \frac{300}{70}

x = 4.28 quarts (approx)

Hence 4.28 quarts (approx) fluid should be drained and replaced with pure antifreeze so that the new mixture is 60% antifreeze .

Therefore the option (c.) is correct .

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3 years ago
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scoundrel [369]

Answer:

B, A

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In the first equation, if an unknown number plus 17 equals 66, then what step would you take?

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In this example, if x + 17 = 66, then subtracting 17 from both sides gets us x = 49.

The same applies for the second example. If x minus 54 equals 125, then you would add 54 to get x = 179.

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Answer: D 20in2

Step-by-step explanation:

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Answer:

undefined

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Step-by-step explanation:

The formula for slope is

m = (y2-y1)/ (x2-x1)

We have points

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m = (-7-2) /(-7--7)

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