3 years ago

Two questions for 30 points.

Mathematics

1 answer:

omeli [17]3 years ago

3 0

Answer:

The first question is c

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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)

4 0

3 years ago

5x when x=7 ......... NEED HELP

Gnoma [55]

Answer:

Step-by-step explanation:

5 x 7 = 35

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3 years ago

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Which expression is equivalent to (5^4)^2<br> A. 25^8<br> B. 20^2<br> C. 5^8<br> D. 5^6

Yuliya22 [10]

Answer:

C. 5^8

to raise a power to another power, multiply the exponents

then multiply thr numbers

then u get 5^8

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3 years ago

What is the area of the parallelogram shown below?

Maru [420]

Answer:

Step-by-step explanation:

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2 years ago

What is the solution to 3(4x - 8) = 4(6 - 3x) ?

Elan Coil [88]

Answer:

Step-by-step explanation:

distributive

12x-24=24-12x

combining terms

12x-24+12x=24

24x-24=24

24x=48

x=48/24

x=2

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3 years ago

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