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GaryK [48]
3 years ago
8

Solve the system of equations -4x+11=15 and x=2y

Mathematics
1 answer:
bixtya [17]3 years ago
8 0

Answer:

x = -, y = - 1/2

Step-by-step explanation:

- 4x + 11 = 15 \\  - 4x = 18 - 11 \\  - 4x = 4 \\ x =  \frac{4}{ - 4}  \\ \red{ \bold{ x =  - 1}} \\ x = 2y \\ 2y =  - 1 \\ \purple{ \bold{ y=  -  \frac{1}{2} }}

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It would be B) They are congruent
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Find the sum of the first 8 terms in the following geometric series.
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Answer: 43690

Step-by-step explanation:

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GIVING BRAINLIEST! A rectangular garden has a width of 10 feet and a length of 14 feet. A cement walkway is added around the out
Serjik [45]

Given:

Width of a garden = 10 feet

Length of the garden = 14 feet

Area of the garden and the walkway together = 396 square feet.

To find:

The width of the walkway.

Solution:

A cement walkway is added around the outside of the garden.

Let x be the width of the walkway.

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Area=(14+2x)\times (10+2x)

396=140+28x+20x+4x^2

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Divide both sides by 4.

99=35+12x+x^2

0=35-99+12x+x^2

0=-64+12x+x^2

Splitting the middle term, we get

x^2+16x-4x-64=0

x(x+16)-4(x+16)=0

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(x+16)=0\text{ and }(x-4)=0

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Mrs. Del Pup bought 20 yards of border for her classroom bulletin board.
KengaRu [80]

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x(10-x) = -x^2+10x

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