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3 years ago

How to do this question?

Mathematics

1 answer:

diamong [38]3 years ago

3 0

Remark

Drawing that diagram was a very good idea. If you can picture something happening, you are half way there. I tend to use a table, but the diagram will come to the same thing.

Olivia Dawn

Start 176 80

Donate x x Subtract

What's left 176 - x 80 - x

Equation

176 - x = 5*(80 - x) Olivia had 5 times as many books as Dawn did. Remove the brackets.

Solution

176 - x = 400 - 5x Add 5x to both sides

176 + 5x - x = 400 Combine terms on the left

176 + 4x = 400 Subtract 176 from both sides

4x = 400 - 176 Combine terms on the right.

4x = 224 Divide by 4

x = 224/4

x = 56 Answer

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Which choice best represents the surface area of the triangular prism shown below?

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Answer: 264

Step-by-step explanation:

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3 years ago

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The volume of a cylinder with height h h and radius r r can be found using the formula V = ? r 2 h V=?r2h Find the volume of a c

Pavel [41]

Answer:

5.000 ft

Step-by-step explanation:

The formula for the volume of a cylinder is

V = πr²h

Data:

V = 785.4 ft³

h = 2r

Calculations:

V = πr²h = πr²(2r) = 2πr³

Divide each side by 2π

$\frac{V }{2\pi } = r^{3}$

Take the cube root of each side

$r = \sqrt[3]{\frac{V }{2\pi}}$

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3 years ago

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NemiM [27]

Answer:

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Step-by-step explanation:

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3 years ago

Ginny's piggybank contained $8.80 in quarters, dimes, and nickels. there were two more than five times as many nickels as quarte

SSSSS [86.1K]

Answer:

There are 13 quarters, 67 nickels, and 22 dimes.

Step-by-step explanation:

The value of a quarter is $0.25, the value of dime is $0.10, and the value of a nickel is $0.05. Let there be q quarters, n nickels, and d dimes.

Let's write equations from the statements given:

"Ginny's piggybank contained $8.80 in quarters, dimes, and nickels.":

$0.25q+0.1d+0.05n=8.80$

"there were two more than five times as many nickels as quarters":

$5q+2=n$

"4 less than twice as many dimes as quarters":

$2q-4=d$

Plugging in equation 2 and 3 into equation 1, we can solve for q:

$0.25q+0.1(2q-4)+0.05(5q+2)=8.80\\0.25q+0.2q-0.4+0.25q+0.1=8.80\\0.7q=8.80+0.4-0.1\\0.7q=9.1\\q=\frac{9.1}{0.7}=13$

Substituting q = 13 into equation 2 will give us nickels:

$n=5q+2\\n=5(13)+2\\n=67$

Substituting q = 13 into equation 3 will give us dimes:

$d=2q-4\\d=2(13)-4\\d=22$

There are 13 quarters, 67 nickels, and 22 dimes.

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3 years ago

Find the volume. Confusing

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4 years ago

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