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3 years ago

Kelly Union works as a cashier and earns $12.75 per hour. Kelly worked

Mathematics

1 answer:

Shkiper50 [21]3 years ago

4 0

Answer:

it's 300=8 hours per hour

Step-by-step explanation:

533=9=5=8 you have to jump two times till u get 8

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What is this!!!!!!!!!!!!! Help !!!!!!

bezimeni [28]

Answer:

A. y=3x+6

Step-by-step explanation:

1. x=y/3 -2

2.x+2= y/3

3. 3(x+2)=y

Final Answer: y=3x+6

8 0

3 years ago

For each pair of jeans i will buy 3 sweaters. how many sweaters can i buy if i have $255

Zepler [3.9K]

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3 years ago

What is 3/4 doubled? Is it 6/8 or 1 2/4?

Amanda [17]

Answer:

1 2/4

Step-by-step explanation:

3/4 doubled is $2(\frac{3}{4} )=\frac{3}{2}$

Now, $\frac{6}{8} =\frac{3}{4}$ on simplification.

$1 \frac{2}{4} =\frac{6}{4} =\frac{3}{2}$

Therefore,

3/4 doubled is 1 2/4

6 0

3 years ago

At a grocery store salted peanuts in the Shell cost $0.30 per ounce is $5 enough money to buy one lb of peanuts if it is what am

Natasha_Volkova [10]

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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

5 0

3 years ago