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3 years ago

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Mathematics

1 answer:

sergey [27]3 years ago

6 0

The answer for the question is 3.8

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Solve using the quadratic formula x2 - 6x - 40=0 Question options: x = 10 or x = -4 x = 4 or x = -10 x = -7 or x = 7 x = -4 - √7

Crazy boy [7]

Answer:

$x=-10$ or $x=4$

Step-by-step explanation:

$ax^2+bx+c=0$

$x^2-6x-40=0$

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

$x=\frac{-6\pm\sqrt{6^2-4(1)(-40)}}{2(1)}$

$x=\frac{-6\pm\sqrt{36+160}}{2}$

$x=\frac{-6\pm\sqrt{196}}{2}$

$x=\frac{-6\pm14}{2}$

$x=-3\pm7$

$x=-10$ or $x=4$

6 0

3 years ago

Read 2 more answers

Find the surface area

Korvikt [17]

Answer:

A≈9248.85

Step-by-step explanation:

A=2πrh+2πr2=2·π·32·14+2·π·322≈9248.84877

4 0

2 years ago

7) CJ was painting his apartment. In 15 minutes,

igomit [66]

y = 12x represents the gallons of paint used in x hours.

Step-by-step explanation:

CJ uses 3 gallons of paint in 15 minutes,

15 minutes = 3 gallons

1 minutes = $\frac{3}{15} = \frac{1}{5} \ gallons\\$

1 hour = 60 minutes

Gallons of paint used in 1 hour;

1 hour = $\frac{1}{5}*60=12\ gallons$

CJ uses 12 gallons of paint in 1 hour.

For x hours = 12*x = 12x

Gallons of paints used = y

y = 12x represents the gallons of paint used in x hours.

Keywords: linear equation, multiplication

Learn more about multiplication at:

#LearnwithBrainly

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3 years ago

Tan of the point (3,-2)

jolli1 [7]

Answer:t

you go to the positive of the graph find (3, then you look at the negitive part and find -2 and your answer will get (3,-2)

Step-by-step explanation:

hope it helps

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3 years ago

What is 530,000,000 divided by 15 million?

Liono4ka [1.6K]

Answer:

Step-by-step explanation:

35.3333333333

6 0

3 years ago