2 years ago

PLEASE HELP ME IF YOU DO you will get the most loyal friend and honest and nicest

Mathematics

1 answer:

Over [174]2 years ago

8 0

Answer:

Below:

Step-by-step explanation:

1. 2 15/28

2. 2 7/10

3. 5/6

4. 1 5/12

5. 2 1/12

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What are the coordinates of the x-intercepts of the parabola y = x² - 8x + 15?

tamaranim1 [39]

Answer:

(3, 0) and (5, 0)

Step-by-step explanation:

we have

$y=x^{2}-8x+15$

we know that

The x-intercepts are the values of x when the value of y is equal to zero

For y=0

$x^{2}-8x+15=0$

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

$x=\frac{-b\pm\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$x^{2}-8x+15=0$

$a=1\\b=-8\\c=15$

substitute in the formula

$x=\frac{-(-8)\pm\sqrt{-8^{2}-4(1)(15)}} {2(1)}$

$x=\frac{8\pm\sqrt{4}} {2}$

$x=\frac{8\pm2} {2}$

$x=\frac{8+2} {2}=5$

$x=\frac{8-2} {2}=3$

x=3, x=5

therefore

The x-intercepts are (3,0) and (5,0)

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3 years ago

Which point is a solution to the system 2x^2 + x = y<br> 3x + y = 0

klasskru [66]

Answer:

There are two solutions. (-2,6) and (0,0).

Step-by-step explanation:

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How is finding the unit rate helpful before graphing a proportional relationship

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It is helpful to find a unit rate first. If you find a unit rate first, then it will be easier to compare

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