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3 years ago

What is. -3 - 9n= 42

Mathematics

2 answers:

dlinn [17]3 years ago

7 0

$-3 - 9n= 42 \\\\
-9n=45\\\\
n=-5$

BartSMP [9]3 years ago

4 0

N = -5

-3 + (-9n) = 42
- -3 - -3

-9n = 45
/-9 /-9

n = -5

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Answer:

H=310

Step-by-step explanation:

This problem is a great systems of equations problem--you have two different variables: song size and number of songs.

Let's call the number of standard version downloads (S) and the high quality downloads (H).

You can make two statements:

For number of songs downloaded: S + H = 910

For download size: 2.8(S) + 4.4(H) = 3044.

S will be the same number in both equations and H will be the same number in both equations, so to find S, we can rearrange the first statement to H = 910 - S, then substitute or plug in (910 - S) wherever you see an H in the second equation so that you have only S's in your equation. Should look like this:

2.8(S) + 4.4(910 - S) = 3044

2.8S + 4004 - 4.4S = 3044

-1.6S = -960

s = 600

Your question only asks for the standard version downloads, but to help you out in future Systems situations-

You can also solve for H once you have S by plugging it into either of your equations like this:

600 + H = 910

-600

Hope this helps!

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2 years ago

The result of which expression will best estimate the actual product of (Negative four-fifths) (three-fifths) (Negative StartFra

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Answer:

The Answer Is B

Step-by-step explanation:

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3/5 = 1/2 (Rounded)

-6/7 = -1 (Rounded)

5/6 = 1 (Rounded)

If your looking for the whole thing it would be:

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Your Welcome! <3

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3 years ago

Can you do this because it is confusing to me

erica [24]

A cylinder is a three-dimensional structure formed by two parallel circular bases connected by a curving surface. The volume of the cylinder is 1330.4644 cm³.

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A cylinder is a three-dimensional structure formed by two parallel circular bases connected by a curving surface. The circular bases' centers overlap each other to form a right cylinder.

Given the height of the cylinder is 14 cm, while the diameter of the cylinder is 11 cm. Therefore, the volume of the cylinder can be written as,

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= (π/4)×(11)² × 14

= 1330.5 cm³

Hence, the volume of the cylinder is 1330.5cm³.

Learn more about Cylinder:

brainly.com/question/12248187

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