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Vika [28.1K]
2 years ago
5

Solve the equation 40=2x2+2x by factoring.

Mathematics
1 answer:
just olya [345]2 years ago
5 0

Step-by-step explanation:

please give me brainlest and follow me

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Mrs.Henry hires a local moving company to help her move into her new apartment. The price includes a 15% tip. Mrs.Henry's total
tensa zangetsu [6.8K]
162.15 is the answer because you have to multiply 0.15•141 then add 21.15 to the 141 :)
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2 years ago
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A cylinder has a radius of 20 cm and a height of 2 cm. Find the height of another cylinder that has a radius of 4 cm and the sam
iogann1982 [59]

Answer:

The height of the another cylinder 'h'  = 7

Step-by-step explanation:

<u>Explanation</u>:-

<u>Step 1:-</u>

Surface area of the cylinder  = 2пrh + 2пr^2

Given radius of first cylinder is 20cm

given height of the first cylinder is 2 cm

The surface area of first cylinder is = 2пrh + 2пr^2

                                                          = 2п(20)(2)+2п(2)^2

                                                          = 4п(20+2)

The surface area of first cylinder is  88п

<u>Step 2</u>:

given data The surface area of first cylinder is  88п is same as second cylinder also

<u>Find the height of the second cylinder</u>

Given Radius of the second cylinder r = 4

Surface area of the cylinder  = 2пrh + 2пr^2 = 88п

                                                   2п(4)h+2п(4)^2 =88п

on simplification we get

                                   2п (4h+16) = 88п

after cancellation '2п' value and on simplification, we get

                                    4h+16 = 44

                                    4h = 44-16

                                  4h = 28

                                 h=7

Therefore the height of the another cylinder is 'h' =7

                                   

3 0
3 years ago
Simplify. (22)-3<br><br><br> A) 64 <br> B) -64 <br> C) 1/64<br><br> D) -1/64
saveliy_v [14]

(2^2)^{-3}=4^{-3}=\dfrac{1}{4^3}=\dfrac{1}{64}\\\\Used\ a^{-n}=\dfrac{1}{a^n}

4 0
3 years ago
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Identify the outliers of the data set. Then determine if the outlier increases or decreases the value of the mean.
Juli2301 [7.4K]
<h3>Answer:  D) 76; increases</h3>

========================================================

Explanation:

The main group or cluster of values spans from 32 to 42 (inclusive).

Then off on its own is the value 76, which we consider an outlier. This value is fairly far from the group. As a rule, large outliers pull on the arithmetic mean to make it larger than it should be. Think of it like the outlier pulling on the mean as if it was done through a magnet or gravitational pull.

Similarly, small outliers pull the mean to the left to make it smaller than it should be. We don't have any small outliers in this case.

--------------

Let's consider the set

A = {32, 34, 35, 36, 37, 38, 38, 41, 42, 42, 46}

where I've sorted the values and I replaced 76 with 46.

Computing the mean of set A gets us

(32+34+35+36+37+38+38+41+42+42+46)/11 = 38.27 approximately

--------------

Now let's form this set

B = {32, 34, 35, 36, 37, 38, 38, 41, 42, 42, 76}

which is the original set your teacher gave you. It's nearly identical to set A, except that the 46 is now 76 again.

Compute the mean of set B

(32+34+35+36+37+38+38+41+42+42+76)/11 = 41

---------------

Set A has a mean of roughly 38.72 and set B has a mean of 41. We see that the mean has increased.

3 0
2 years ago
Find the slope of segment AB, A (2,18), B (-2,4)
MariettaO [177]

The formula of a slope:

m=\dfrac{y_2-y_1}{x_2-x_1}

We have the points A(2, 18) and B(-2, 4). Substitute:

m=\dfrac{4-18}{-2-2}=\dfrac{-14}{-4}=\dfrac{14}{4}=\dfrac{7}{2}

3 0
3 years ago
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