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3 years ago

What adds up to -11 but multiplies to 10?

Mathematics

1 answer:

xxMikexx [17]3 years ago

7 0

The answer is -1 and -10

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Solve the equation a = m – n for the variable n.

Rzqust [24]

Step-by-step explanation:

Get n by itself. It doesn't matter how you do it, you'll get the same answer whether you subtract m or add n to the other side. You just need to have a positive n by itself on one side of the equation.

$a=m-n\\n+a=m\\n=m-a$

Answer:

B. $n=m-a$

6 0

3 years ago

A Number decreased by the square of 9

grin007 [14]

X decreased by the square of nine
x - 9^2 = x - 81

8 0

3 years ago

A plane traveled 2565 miles with the wind in 4.5 hours and 2205 miles against the wind in the same amount of time. Find the spee

kherson [118]

Answer:

plane: 530 mi/h
wind: 40 mi/h

Step-by-step explanation:

Let p and w represent the speeds of the plane and the wind. The relation between time, speed, and distance is ...

speed = distance/time

p +w = (2565 mi)/(4.5 h) = 570 mi/h

p -w = (2205 mi)/(4.5 h) = 490 mi/h

Adding these speeds, we get ...

(p +w) +(p -w) = (570) +(490) mi/h

2p = 1060 mi/h

p = 530 mi/h

Then the speed of the wind is ...

w = 570 mi/h -p = (570 -530) mi/h = 40 mi/h

The plane's speed is 530 mi/h; the wind speed is 40 mi/h.

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3 years ago

X = 1 + root 2 , find the value of (x - 1/x )^3

steposvetlana [31]

Answer:

$(\sqrt{2})^3$

Step-by-step explanation:

Given the expression

$(x - \frac{1}{x} )^3$

Simplify

$(\frac{x^2-x}{x} )^3$

Given that x = 1+√2

Substitute

$(\frac{(1+\sqrt{2} )^2-(1+\sqrt{2} )}{1+\sqrt{2} } )^3\\=( \frac{1+2\sqrt{2} +2 - 1 - \sqrt{2}}{1+\sqrt{2}} )^3\\= (\frac{\sqrt{2}+2}{1+\sqrt{2}})^3 \\Rationalize\\= (\frac{\sqrt{2}-2+2-2\sqrt{2}}{1-2})^3 \\=( \frac{-\sqrt{2}}{-1})^3 \\= (\sqrt{2})^3\\ \\$

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3 years ago

Work out<br> (8×10^−2)-(4x10^-4)<br> In standard form

Mrac [35]

64-24rfeeeemvokerfjierfjrijvifre

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3 years ago