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3 years ago

Translate the phrase into a variable expression.

Mathematics

1 answer:

Viktor [21]3 years ago

4 0

"the product of" ⇒ ___ * ___

86 ⇒ 86 . . . . . fills first blank

and

the depth of the river ⇒ d . . . . . fills second blank.

Your expression is

86 * d

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How do I simplify by combining these numbers -3x - 5y + 2x + 10y

Wewaii [24]

They are basically like groups. Take -3x+2x , Just do -3 +2 = -1 and then just add the x. So -1x. Next you have -5y+10y . Just do -5 + 10 = 5 and remember to add the x on so your final answer should be -1x + 5y

4 0

3 years ago

Read 2 more answers

In Pennsylvania the average IQ score is 101.5. The variable is normally distributed, and the population standard deviation is 15

blsea [12.9K]

Answer:

We conclude that the Pennsylvania school district have an IQ higher than the average of 101.5

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 101.5

Sample mean, $\bar{x}$ = 106.4

Sample size, n = 30

Alpha, α = 0.05

Population standard deviation, σ = 15

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 101.5\\H_A: \mu > 101.5$

We use one-tailed z test to perform this hypothesis.

Formula:

$z_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} }$

Putting all the values, we have

$z_{stat} = \displaystyle\frac{106.4 - 101.5}{\frac{15}{\sqrt{30}} } = 1.789$

Now, $z_{critical} \text{ at 0.05 level of significance } = 1.96$

Since,

$z_{stat} > z_{critical}$

We reject the null hypothesis and accept the alternate hypothesis.

Thus, we conclude that the Pennsylvania school district have an IQ higher than the average of 101.5

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2 years ago

Which best describes a graph of a puppy's weight during its first year of life?

Alenkasestr [34]

The answer will be B! I hope this helps!

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3 years ago

How to decompose fraction

Natasha2012 [34]

Simply mean to take it apart. The most basic way to decompose a fraction is to break into unit fractions

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3 years ago

What are the opposites of 5, −2.4, 2.25, and 8 12 ? Enter the answers in respective order, each separated by comma.

andrew11 [14]

Answer:

-5, 2.4, -2.25, -8, -12

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3 years ago

Read 2 more answers