4 years ago

What is pie and how is it used in mathematics

Mathematics

2 answers:

Sati [7]4 years ago

5 0

Pi is a number that is a number that is infinity it never ends

Romashka [77]4 years ago

3 0

Pi is 3.141592653 it is used to help solve equations

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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

How much interest will you get on $800 investment for 1 year at 6.45% ?

Lunna [17]

800 * ( 6.45 / 100 ) = 8 * 6.45 = 51.6$ ;

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3 years ago

PLEASE HELP! With math

Flauer [41]

Use the diamond box method.

x^2 | -6x

10x | -60

-60x^2
10x. -6x
4x

(x-6)(x+10)

x= 6, -10

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4 years ago

3 x cubed equals - 375

AysviL [449]

Do you want this explained ? or the answer

7 0

4 years ago

Whitney and Georgia are at the snack bar buying food for their family. Sandwiches cost $4 each. Salads cost $2 each. How much mo

Nezavi [6.7K]

Answer:

$20 for sandwiches and $14 for salads $34 in total

Step-by-step explanation:

each sandwhich costs $4 so

$4 x 5=$20

$2 x 7=$14

5 0

3 years ago