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4 years ago

Help please.........

Mathematics

1 answer:

Lunna [17]4 years ago

5 0

I am not sure, but the answer is probably option A. Graph A.

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Which phrase represents the graph below?

Vladimir79 [104]

I believe it is a person jumping on a trampoline.

7 0

3 years ago

Solve for a<br> 6=a/4+2 Steps please ❤️

kari74 [83]

Answer:

a = 16

Step-by-step explanation:

6 = a/4 + 2

Switch sides.

a/4 + 2 = 6

Subtract 2 from both sides.

a/4 = 4

Multiply both sides by 4.

a = 16

7 0

4 years ago

Historically, these bolts have an average thickness of 10.1 mm. A recent random sample of 10 bolts yielded these thicknesses: (D

Strike441 [17]

Answer:

So, the sample mean is 9.99.

So, the standard deviation is 0.32.

Step-by-step explanation:

From Exercise we have the next numbers: 9.7 9.9 10.3 10.1 10.5 9.4 9.9 10.1 9.7 10.3.

So, N=10, because we have 10 numbers.

We calculate the sample mean:

$\overline{x}=\frac{9.7+ 9.9+ 10.3+ 10.1+ 10.5+ 9.4+ 9.9+ 10.1+ 9.7+ 10.3}{10}\\\\\overline{x}=\frac{99.9}{10}\\\\\overline{x}=9.99$

So, the sample mean is 9.99.

We use the formula for standard deviation:

$\sigma=\sqrt{\frac{1}{N}\sum_{i=1}^N(x_i-\overline{x})^2}$

Now, we calculate the sum

$\sum_{i=1}^{10}(x_i-9.99)^2=(9.7-9.99)^2+(9.9-9.99)^2+(10.3-9.99)^2+(10.1-9.99)^2+(10.5-9.99)^2+(9.4-9.99)^2+(9.9-9.99)^2+(10.1-9.99)^2+(9.7-9.99)^2+(10.3-9.99)^2\\\\\sum_{i=1}^{10}(x_i-9.99)^2=1.009$

Therefore, we get

$\sigma=\sqrt{\frac{1}{N}\sum_{i=1}^N(x_i-\overline{x})^2}\\\\\sigma=\sqrt{\frac{1}{10}\cdot 1.009}\\\\\sigma=0.32$

So, the standard deviation is 0.32.

5 0

4 years ago

There are 16 pink stripes and 20 green stripes find the ratio of pink stripes to green stripes

lesya [120]

Answer: 4 to 5 (in terms of pink to green)

7 0

4 years ago

Find the value of x.

earnstyle [38]

Answer:

110 degrees

Step-by-step explanation:

The sum of all the interior angles of a polygon is always equal to 180(n-2) where n is the number of sides. In this figure, there are 7 sides. This means that the sum of all the interior angles is 180(7-2) = 180 * 5 = 900.

Now, add up all the angles that you know and subtract that from 900 to find the value of x.

900 - (105 + 150 + 140 + 135 + 125 + 135) = 900 - 790 = 110 degrees

7 0

3 years ago

Read 2 more answers