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solmaris [256]
3 years ago
10

Rob is saving to buy a new MP3 player. For every $15 he earns babysitting, he saves $6. On Saturday, Rob earned $75 babysitting.

How much money did he save?
Mathematics
1 answer:
Sonbull [250]3 years ago
4 0
First you have to see how many time 15 goes into 75, which is 5 so for every time 15 goes into 75 it would be another $6, so the answer is 6 * 5 which is $30. Hope this helps!
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3:1 or 1:3

Explanation:

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3 years ago
7th grade math. I don't understand so if you can answer it for me it would be deeply appreciated!
ExtremeBDS [4]
I believe it would be y=2w-3.
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3 years ago
A conservative estimate of the number of stars in the universe is 6 x 10^22. The average human can see about 3,000 stars at nigh
Ilia_Sergeevich [38]

2 \times 10^{19} times more stars are there in universe compared to human eye can see

<h3><u>Solution:</u></h3>

Given that, conservative estimate of the number of stars in the universe is 6 \times 10^{22}

The average human can see about 3,000 stars at night with only their eyes

To find: Number of times more stars are there in the universe, compared to the stars a human can see

Let "x" be the number of times more stars are there in the universe, compared to the stars a human can see

Then from given statement,

\text{Stars in universe} = x \times \text{ number of stars human can see}

<em><u>Substituting given values we get,</u></em>

6 \times 10^{22} = x \times 3000\\\\x = \frac{6 \times 10^{22}}{3000}\\\\x = \frac{6 \times 10^{22}}{3 \times 10^3}\\\\x = 2 \times 10^{22-3}\\\\x = 2 \times 10^{19}

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5 0
4 years ago
1. Evaluate -3x^3 -2y^2 when x=-5 and y =3
-Dominant- [34]

Answer:

357

Step-by-step explanation:

A) We replace x = - 5 and u = 3 into -3x^3 -2y^2

and we have -3x^3 -2y^2= -3*(-5)^3 -2*3^2= -3*(-125)- 2*9

or -3x^3 -2y^2 = 375-18= 357

The answer is 357.

B) Replace h = -2 into h^2-3h+2

we have h^2-3h+2 = (-2)^2 -3*(-2) +2 = 4 +6 + 2= 12

The answer is 12

Have a good day.

8 0
4 years ago
Mr. kelly uses an expression to represent the perimeter of a square. Rewrite the expression to represent the length of a side of
nikklg [1K]

Answer:

Step-by-step explanation:

P = 8x + 20

4*side = 8x + 20

side = (8x + 20)/4

= 8x/4 + 20/4

side = 2x + 5

3 0
3 years ago
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