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kondaur [170]
3 years ago
9

X+2y=2 and -x+y=-5. Please help

Mathematics
1 answer:
salantis [7]3 years ago
5 0

Answer:

x=4

y=-1

Step-by-step explanation:

x + 2y = 2

-x + y = -5

3y = -3

y = -1

If you would then plug in -1 (for y) then you would get x=4

For example:

x + 2(-1) = 2

x - 2 = 2

x = 4

OR

-x - 1 = -5

-1 + 5 = x

4 = x

x = 4

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The difference in length of a spring on a pogo stick from its non-compressed length wen a teenager is jumping on it after θ seco
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Answer:

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Step-by-step explanation:

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6 0
2 years ago
. The volume of a box is 405 cubic units. The length is x units, the width 4 units greater than the length, and the height is 9
lukranit [14]

Answer:

length = 5

width = 9

Step-by-step explanation:

V = lwh

let 'x' = length

let '4+x' = width

9 = height

405 = 9x(4+x)

405 = 36x + 9x²

this is a quadratic equation:  9x² + 36x - 405 = 0

factor out a 9 to get:

9(x² + 4x - 45) = 0

9(x-5)(x+9) = 0

one root is 5 and the other is -9

since distance cannot be negative we use 5 as the length and 9 is the width

3 0
2 years ago
Find the area in square units ​
Dafna11 [192]

Answer: 24

Step-by-step explanation:

First count it all right 6 x 6 = 36

Then the squares inside are 4 x 3 = 12

36 - 12 = 24

I beilive that is your answer.

4 0
2 years ago
At Oakton, Midlothian, and Jefferson high schools, the long jumpers employ different strategies for competition. At Oakton high
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3 years ago
The length of a rectangle is 6 inches more than its width. Its area is 91 square inches. The length is .
Vika [28.1K]

Answer:

13 in

Step-by-step explanation:

let w be width then length is w + 6

the area (A) of a rectangle is calculated as

A = length × width , then

A = w(w + 6) = 91 , that is

w² + 6w = 91 ( subtract 91 from both sides )

w² + 6w - 91 = 0 ← in standard quadratic form

(w + 13)(w - 7) = 0 ← in factored form

equate each factor to zero and solve for w

w + 13 = 0 ⇒ w = - 13

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however, w > 0 then w = 7

and length = w + 6 = 7 + 6 = 13 in

8 0
2 years ago
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