Solve the equation by factoring. x² + 2x - 63 = 0 x = -9, [?]

Mathematics

1 answer:

xeze [42]1 year ago

7 0

Step-by-step explanation:

x² + 2x - 63 = 0

(x+9)(x-7)=0

x=-9 x=7

You might be interested in

HALP PLS NO LINKS OR FILES PLS<br> SCREENSHOT BELOW!!!

Sidana [21]

Answer:

12 and 13

Step-by-step explanation:

7 0

3 years ago

A particular computer takes 11 minutes to download a 33-minute TV show. How long will it take the computer to download a 2.5-h

zhenek [66]

First off.. we need to get the units the same. All in hours,

or all in minutes. 36 minutes = 36/60 hours = 3/5 hours = 0.6 hours.

12 minutes = 12/60 hours = 1/5 hours = 0.2 hours

Set up a proportion:

0.2 is to 0.6 as x is to 22.5

x/22.5 = 0.2/0.6

x = 0.2(22.5)/0.6

x = 7.5 hours

thanx

heyaaaaa

8 0

3 years ago

An artist cuts 4 squares with side length x ft from the corners of a 12 ft-by-18 ft rectangular piece of sheet metal. She bends

Kruka [31]

Answer:

$V=4x^3-60x^2+216x$

Step-by-step explanation:

<u>Volume And Function s</u>

Geometry can usually be joined with algebra to express volumes as a function of some variable. The volume of a parallelepiped of dimensions a,b,c is

$V=abc$

Our problem consists in computing the volume of a box made with some sheet of metal 12 ft by 18 ft. The four corners are cut by a square distance x as shown in the image below .

If the four corners are to be lifted and a box formed, the base of the box will have dimensions (12-2x)(18-2x) and the height will be x. The volume of the box is

$V=x(12-2x)(18-2x)$