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mr_godi [17]
3 years ago
7

Collin wants to solve this system of equations. Which number can he multiply the first equation by so that when the two equation

s are added together, the x term is eliminated?
1/2x + 1/4y = 5
2x + 3/8y = 5

A. -4
B. -2
C. 2
D. 4
Mathematics
2 answers:
Dvinal [7]3 years ago
8 0

Answer:

A.-4

Step-by-step explanation:

I just took the test

siniylev [52]3 years ago
4 0
If u multiply the first equation by -4, u get -2x - y = -20

and when u add the 2 equations..
-2x - y = -20
2x + 3/8y = 5
-----------------
0 - 5/8y = -15.....u notice that the x terms r eliminated.

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Natali [406]

Answer:

16.....................................

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  • 6⁹⁺ⁿ = ¹²
  • 9 + n = 12
  • n = 3

17.....................................

  • 7⁸/7ⁿ = 7³
  • 7⁸⁻ⁿ = 7³
  • 8 - n = 3
  • n = 5

18.....................................

  • 15ⁿ = 1
  • 15ⁿ = 15⁰
  • n = 0

19.....................................

  • 1/10⁵ = 10ⁿ
  • 10⁻⁵ = 10ⁿ
  • -5 = n
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20.....................................

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3 0
2 years ago
10% of the songs on Emma's playlist are in Spanish. If she has 6 Spanish songs on her playlist, how many total songs are on it?
Vinvika [58]

If 10% of songs represents 6 songs,

then 100% of songs represents (100 * 6) / 10 = 60 songs

The playlist has a total of 60 songs.

7 0
3 years ago
The areas of two similar octagons are 9 m² and 25 m². What is the scale factor of their side lengths? PLZ HELP PLZ PLZ PLZ
torisob [31]

Answer:

\frac{3}{5}

Step-by-step explanation:

Let the side length for the octagon having 9m² as area = x

Side length for the octagon having area of 25m² = y.

Thus:

\frac{9}{25} = (\frac{x}{y})^2 (area of similar polygons theorem)

The scale factor of their sides would be \frac{x}{y}. Which is:

\sqrt{\frac{9}{25}} = \frac{x}{y}

\frac{\sqrt{9}}{\sqrt{25}} = \frac{x}{y}

\frac{3}{5} = \frac{x}{y}

Scale factor of their sides = \frac{3}{5}

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3 years ago
Jose wants to be a vet, so he reads a lot. This month he read 14 books about dogs, 5 books about birds,6 about other animals and
Lana71 [14]
18 more were about animals
7 0
3 years ago
Please answer as soon as possible, im in a bit of a hurry.
12345 [234]

Easy bruh

Answer:

6w^3

Step-by-step explanation:

It can't be any answer with cubed in it because that would be volume. So, A and C magically vanish. If we know that the length of a cube is w that means that all sides are w. There are six faces on a cube. If we want to find surface area we will have to add up the area of all faces. the area of one face will be w^2. We multiply that number by six and we get 6w^3.

4 0
3 years ago
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