3 years ago

What are the solutions of x2 = 8 - 5x?

Mathematics

1 answer:

jonny [76]3 years ago

5 0

Answer:

That can be re-written:

x^2 + 5x -8 = 0

We use the Quadratic Formula

a=1

b = 5

c = -8

x = [-b +- sq root (b^2 - 4ac) ] / 2a

x = [-5 +- sq root (25 - - 32)] / 2

x1 = [-5 + sq root (57)] / 2

x1 = 1.27491722

x2 = [-5 - sq root (57)] / 2

x2 = -6.2749172176

Step-by-step explanation:

You might be interested in

Planet X is 1/2 of a light-year away from Earth. Planet Y is 3/10 of a light-year away from Earth. How much farther away is Plan

kakasveta [241]

Answer:

1/2= 5/10

5/10 - 3/10 = 2/10 or 1/5

so planet X is 1/5 of a light-year closer

Step-by-step explanation:

8 0

2 years ago

Read 2 more answers

What is 2 x 9 x 18 x 28 x 46 x 58, its a hard question

Yuliya22 [10]

2x9 is 18x18 is 324 x28 is 9072 x 46 is 417,312 so the x 58 the answer is 24,204,096

8 0

2 years ago

Read 2 more answers

Why is it necessary to learn how to factor if you can just use the quadratic formula to solve quadratic equations?

xxTIMURxx [149]

Because u might need it in the real world.

4 0

3 years ago

Hello! Can someone help with this question?

IgorC [24]

Hello! :)

$\large\boxed{\text{70 seconds}}$

Use a proportion to find how many seconds are needed to fold 5 shirts.

We are given that he takes 28 seconds to fold 2 shirts:

28 sec : 2 shirts

We are not given the amount of time needed for 5 shirts, which we need to solve:

x seconds : 5 shirts

Express in a fraction:

$\frac{2 shirts}{28 seconds} = \frac{5 shirts}{xseconds}$

Cross multiply and simplify:

$2 * x = 5 * 28\\\\2x = 140\\\\x = 70 sec$

Therefore, he needs 70 seconds to fold 5 shirts.

5 0

2 years ago

PLEASE HELP 25 POINTS!

patriot [66]

Answer:

46,666

Step-by-step explanation:

3 0

2 years ago