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Karo-lina-s [1.5K]
3 years ago
7

Using the Quadratic Formula, which of the following is the solution to the quadratic equation x2 - x - 20 = 0?

Mathematics
2 answers:
svlad2 [7]3 years ago
8 0
The answer to this is c
katovenus [111]3 years ago
4 0
The answer to the question is c
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Step-by-step explanation:

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A rectangle has an area of 72 in². The length and the width of the rectangle are changed by a scale factor of 3.5.
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Drag the tiles to the correct boxes to complete the pairs. Not all tiles will be used. Match the linear equations with their x-
jolli1 [7]

Answer:

Part 1) x-2y=2 ----> (2,0) and (0,-1)

Part 2) -3x+3y=7 ----> (-7/3,0) and (0,7/3)

Part 3) 7x-y=21 ----> (3,0) and (0,-21)

Part 4) 3x-5y=-20 ----> (-20/3,0) and (0,4)

Step-by-step explanation:

we know that

The y-intercept is the value of y when the value of x is equal to zero

The x-intercept is the value of x when the value of y is equal to zero

Part 1) we have

x-2y=2

1) <u><em>Find the x-intercept</em></u>

For y=0

x-2(0)=2\\x=2

the x-intercept is (2,0)

2) <u><em>Find the y-intercept</em></u>

For x=0

0-2y=2\\y=-1

the y-intercept is (0,-1)

Part 2) we have

-3x+3y=7

1) <u><em>Find the x-intercept</em></u>

For y=0

-3x+3(0)=7\\x=-\frac{7}{3}

the x-intercept is (-7/3,0)

2) <u><em>Find the y-intercept</em></u>

For x=0

-3(0)+3y=7\\y=\frac{7}{3}

the y-intercept is (0,7/3)

Part 3) we have

7x-y=21

1) <u><em>Find the x-intercept</em></u>

For y=0

7x-(0)=21\\x=3

the x-intercept is (3,0)

2) <u><em>Find the y-intercept</em></u>

For x=0

7(0)-y=21\\y=-21

the y-intercept is (0,-21)

Part 4) we have

3x-5y=-20

1) <u><em>Find the x-intercept</em></u>

For y=0

3x-5(0)=-20\\x=-\frac{20}{3}

the x-intercept is (-20/3,0)

2) <u><em>Find the y-intercept</em></u>

For x=0

3(0)-5y=-20\\y=4

the y-intercept is (0,4)

8 0
3 years ago
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