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2 years ago

A change purse contains an equal number of pennies, nickels, and dimes. The total value of the

Mathematics

1 answer:

Nutka1998 [239]2 years ago

3 0

Answer:

Step-by-step explanation:

If there are "x" of each coin, then the value of the coins will bw (1 + 5 + 10)x, which equals 560 (given).

16x = 560 -->

x = 35

There are 35 of each type of coin

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Answer:

x =5

Step-by-step explanation:

x = -4 +9

x = 5 Answer

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2 years ago

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Sketch 0=7pi/6 in standard position

lara31 [8.8K]

Answer:

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Step-by-step explanation:

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2 years ago

The sandbox is in the shape of a right rectangular prism. The area of the base of the sandbox is 124.8 square centimeters, and i

Genrish500 [490]

Answer: he will need 355.68 centimeters³ of sand to fill half of the sandbox

Step-by-step explanation:

The formula for determining the volume of a rectangular prism is expressed as

Volume = length × base × height

It can also be expressed as

Volume = base area × height

The area of the base of the sandbox is 124.8 square centimeters, and it will have a height of 5.7 centimeters. This means that the volume of the sandbox is

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2 years ago

Celia ate 5/8 of a pizza what decimal is equivalent to the fraction of pizza celia ate

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Answer:

0.625

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5÷8=0.625

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2 years ago

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to arrive at 2000 liters of 60% saline solution the attendant has to mix a 90% and a 40% saline solution. How many liters of eac

CaHeK987 [17]

Answer:

800 liters of 90% saline solution and 1200 liters of 40% saline solution should be used.

Step-by-step explanation:

Given:

At 2000 liters of 60% saline solution the attendant has to mix a 90% and a 40% saline solution.

Now, to find the number of liters of saline solution each should be used.

Let the liters of 90% saline solution mix be $x.$

And let the liters of 40% saline solution mix be $y.$

So, the total number of liters:

$x+y=2000.$

$y=2000-x\ \ \ ....(1)$

Now, the total percentage of saline solution:

$90\%\ of\ x+40\%\ of\ y=60\%\ of\ 2000$

$\frac{90}{100}\times x+\frac{40}{100}\times y=\frac{60}{100}\times 2000$

$0.9x+0.4y=1200$

Substituting the value of $y$ from equation (1) we get:

$0.9x+0.4(2000-x)=1200$

$0.9x+800-0.4x=1200$

$0.5x+800=1200$

Subtracting both sides by 800 we get:

$0.5x=400$

Dividing both sides by 0.5 we get:

$x=800.$

The liters of 90% saline solution mix = 800.

Now, substituting the value of $x$ in equation (1) to get the liters of 40% saline solution:

$y=2000-x$

$y=2000-800$

$y=1200.$

Thus, the liters of 40% saline solution = 1200.

Therefore, 800 liters of 90% saline solution and 1200 liters of 40% saline solution should be used.

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3 years ago