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4 years ago

Cameron bought 5 music CDs for $15.75. How much did each CD cost?

Mathematics

1 answer:

olga nikolaevna [1]4 years ago

7 0

The answer would be $3.15

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Will crown the correct answers brainliest 3x

Solnce55 [7]

Answer :

(1) $\frac{1}{x}+\frac{1}{y}=\frac{y+x}{xy}$

(2) $\frac{1}{5x}+\frac{1}{3y}=\frac{3y+5x}{15xy}$

(3) $\frac{1}{7x}-\frac{1}{2y}=\frac{2y-7x}{14xy}$

(4) $\frac{2}{5x}+\frac{3}{7y}=\frac{6y+15x}{21xy}$

(5) $\frac{7}{11x}-\frac{1}{33y}=\frac{231y-11x}{363xy}$

(6) $\frac{1}{2x}+\frac{3}{x}-\frac{1}{7y}=\frac{7y+42y-2x}{14xy}$

Step-by-step explanation :

(1) The given expression is: $\frac{1}{x}+\frac{1}{y}$

$\frac{1}{x}+\frac{1}{y}=\frac{y+x}{xy}$

(2) The given expression is: $\frac{1}{5x}+\frac{1}{3y}$

$\frac{1}{5x}+\frac{1}{3y}=\frac{3y+5x}{(5x)\times (3y)}=\frac{3y+5x}{15xy}$

(3) The given expression is: $\frac{1}{7x}-\frac{1}{2y}$

$\frac{1}{7x}-\frac{1}{2y}=\frac{2y-7x}{(7x)\times (2y)}=\frac{2y-7x}{14xy}$

(4) The given expression is: $\frac{2}{5x}+\frac{3}{7y}$

$\frac{2}{5x}+\frac{3}{7y}=\frac{(2\times 3y)+(3\times 5x)}{(5x)\times (7y)}=\frac{6y+15x}{21xy}$

(5) The given expression is: $\frac{7}{11x}-\frac{1}{33y}$

$\frac{7}{11x}-\frac{1}{33y}=\frac{(7\times 33y)-(1\times 11x)}{(11x)\times (33y)}=\frac{231y-11x}{363xy}$

(6) The given expression is: $\frac{1}{2x}+\frac{3}{x}-\frac{1}{7y}$

$\frac{1}{2x}+\frac{3}{x}-\frac{1}{7y}=\frac{(x\times 7y)+(3\times 2x\times 7y)-(2x\times x)}{(2x)\times (x)\times (7y)}=\frac{7xy+42xy-2x^2}{14x^2y}=\frac{7y+42y-2x}{14xy}$

7 0

3 years ago

Tim needs to use one kilogram of pasta to serve four persons. How many grams of pasta do they each have?

bogdanovich [222]

Answer: 250 grams

Explanation: A kilogram is equal to 1000 grams. All you have to do is divide the 1000 between the 4 people.
1000/4=250

5 0

2 years ago

PLEASE HELP !!!

andreyandreev [35.5K]

Answer:

$68y

Step-by-step explanation:

i just thought of it don't ask

8 0

3 years ago

Which number is an irrational number?

ad-work [718]

1. To solve this problem, you must keep on mind the followinwg information:

You know that, by definition, an irrational number is a number that cannot be expressed as a fraction.

2. Therefore, the correct answer is the option D.

3. To verify the answer you have:

∛16=2.51

As you can see, the result is 2.51 and the decimal number 2.51 cannot be expressed as a fraction.

3 0

3 years ago

Read 2 more answers

Find the volume of the given cylinder.<br> r=5 ft., h=15 ft.

adoni [48]

Due to the formula for the volume of a cylinder being:
V = πr2h

Then:
V = π • 5 • 2 • 15

Equals:
V ≈ 1178.1

Give this answer Brainliest!

7 0

2 years ago