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3 years ago

Is x=-2 calculate the value of x2 +2x

Mathematics

1 answer:

DerKrebs [107]3 years ago

3 0

Hey there,
x ^2 + 2x
(-2) ^2 + 2(-2)
-4 + -4
= -8

Hope this helps :))

~Top

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<img src="https://tex.z-dn.net/?f=%5Csqrt%281-2%29%2B%5Csqrt%281%2B2%29%5C%5C" id="TexFormula1" title="\sqrt(1-2)+\sqrt(1+2)\\"

Kipish [7]

1.4 or square root of 2

8 0

2 years ago

Solve the inequality.

marysya [2.9K]

Answer:

$\huge x > \frac{7}{3} \\$

Step-by-step explanation:

$8( \frac{1}{2} x - \frac{1}{4} ) > 12 - 2x \\$

<u>Expand the terms in the bracket</u>

That's

$8( \frac{1}{2} x) - 8( \frac{1}{4} ) > 12 - 2x \\ 4x - 2 > 12 - 2x$

Move -2x to the other side of the inequality

$4x + 2x - 2 > 12 \\ 6x - 2 > 12$

<u>Move - 2 to the other side of the inequality</u>

$6x > 12 + 2 \\ 6x > 14$

Divide both sides by 6

$\frac{6x}{6} > \frac{14}{6} \\$

We have the final answer as

$x > \frac{7}{3} \\$

Hope this helps you

5 0

3 years ago

Find the mean of 81, 97, 99, 89, 91, 76 (round to the hundredths)

Marta_Voda [28]

Answer:

88.83

Step-by-step explanation:

To find the mean of a set of numbers is to find the average a set of numbers.

To solve for the mean you have to add all of the values together and divide that sum by the number of values there are.

Ex. 81, 97, 99, 89, 91, 76

81 + 97 + 99 + 89 + 91 + 76 = 533

533 / 6 = 88.83

↓

(number of values)

3 0

3 years ago

I dont get it?? how do i set it up?? im so... confused?? can i get some helpm

snow_tiger [21]

Well, you need a diagram (see attached).

Since angle S = angle T then

9x -11 = 7x -3 ...... 2x = 8 ........ x = 4

RS = RT = 4

There must be some more information that can't be seen

5 0

3 years ago

a photo that is 4in wide and 6in high enlarged to a poster that is 3ft wide and 4 1/2 ft hugh what is the ratio of the width of

salantis [7]

1:9 is the ratio

You can check this by converting the feet to inches and dividing the greatest number by the smaller number.

6 0

2 years ago

Read 2 more answers