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3 years ago

The sum of -6 and the quantity 9 times X Need help asap

Mathematics

1 answer:

DiKsa [7]3 years ago

3 0

Answer:

-6 + 9x

Step-by-step explanation:

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Marvin travels 105 miles on his scooter.He travels for 3 hours.What is his average speed

irina [24]

To find the average speed, divide the miles by the hours.

105 miles/ 3 hours= 35 miles per hour, or mph

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3 years ago

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Evaluate (-32)^-4/5 . Do not leave any exponents in your answer.

Alexeev081 [22]

Answer:

1/16

Step-by-step explanation:

(-32)^-4/5 =
(-2^5)^-4/5 =
(-2)^-(5*4/5) =
(-2)^ -4=
16^-1=
1/16

3 0

3 years ago

A circle is drawn within a square as shown. What is the best approximation for the area of the shaded region? Use 3.14 to approx

FrozenT [24]

Answer with explanation:

Length of side of Square = 7 cm

Area of Square = (Side)²=7²=49 cm²

Diameter of circle = 7 cm

So, Radius $=\frac{7}{2}=3.5$ cm

Area of circle = π × (Radius)²

=3.14 × (3.5)²

= 3.14 × 12.25

= 38.465 cm²

Area of shaded Region = Area of Square - Area of Circle

= 49 - 38.465

= 10.535 cm²

=10.54 cm²

Option A

4 0

4 years ago

Read 2 more answers

A simple random sample of size nequals81 is obtained from a population with mu equals 83 and sigma equals 27. (a) Describe the

Ivanshal [37]

Answer:

a) $\bar X \sim N (\mu, \frac{\sigma}{\sqrt{n}})$

With:

$\mu_{\bar X}= 83$

$\sigma_{\bar X}=\frac{27}{\sqrt{81}}= 3$

b) $z= \frac{89-83}{\frac{27}{\sqrt{81}}}= 2$

$P(Z>2) = 1-P(Z$

c) $z= \frac{75.65-83}{\frac{27}{\sqrt{81}}}= -2.45$

$P(Z$

d) $z= \frac{89.3-83}{\frac{27}{\sqrt{81}}}= 2.1$

$z= \frac{79.4-83}{\frac{27}{\sqrt{81}}}= -1.2$

$P(-1.2$

Step-by-step explanation:

For this case we know the following propoertis for the random variable X

$\mu = 83, \sigma = 27$

We select a sample size of n = 81

Part a

Since the sample size is large enough we can use the central limit distribution and the distribution for the sampel mean on this case would be:

$\bar X \sim N (\mu, \frac{\sigma}{\sqrt{n}})$

With:

$\mu_{\bar X}= 83$

$\sigma_{\bar X}=\frac{27}{\sqrt{81}}= 3$

Part b

We want this probability:

$P(\bar X>89)$

We can use the z score formula given by:

$z = \frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n}}}$

And if we find the z score for 89 we got:

$z= \frac{89-83}{\frac{27}{\sqrt{81}}}= 2$

$P(Z>2) = 1-P(Z$

Part c

$P(\bar X$

We can use the z score formula given by:

$z = \frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n}}}$

And if we find the z score for 75.65 we got:

$z= \frac{75.65-83}{\frac{27}{\sqrt{81}}}= -2.45$

$P(Z$

Part d

We want this probability:

$P(79.4 < \bar X < 89.3)$

We find the z scores:

$z= \frac{89.3-83}{\frac{27}{\sqrt{81}}}= 2.1$

$z= \frac{79.4-83}{\frac{27}{\sqrt{81}}}= -1.2$

$P(-1.2$

8 0

4 years ago

Find the two consecutive positive even numbers whose sum of their square is 580.

Afina-wow [57]

Answer:16 and 18

Step-by-step explanation:

16x16=256

18x18=324

256+324=580

7 0

3 years ago