Please help ASAP ill give you brainiest :c

Mathematics

2 answers:

belka [17]3 years ago

8 0

Answer:

Jan earns $4 more per hour than Eli

Step-by-step explanation:

Jan has $24 every 4 hours while Eli only has $20 every 4 hours

jarptica [38.1K]3 years ago

7 0

Answer:

Jan earns 1$ more per hour than Eli

Step-by-step explanation:

If you divide Eli's 20$ by 4 hours you get 5. This means Eli makes 5 dollars every hour.

To find Jans earning,you need to look at the graph where the 1 on thebotton meets up with the first number on the left which is 6. That shows how the firat hour Jan makes 6. I hope I helped!

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10x+2 = 3x + 30 Find x (please)

Ganezh [65]

Answer: x=4

10x-3x=30-2
7x=28
X=4

7 0

3 years ago

A survey of 90 men found that an average amount spent on St. Patrick's day of $55 with a standard deviation of $18. A similar su

dem82 [27]

Answer:

The value of the test statistic is 4.70.

Step-by-step explanation:

The hypothesis for this test can be defined as follows:

H₀: Men do not spend more than women on St. Patrick's day, i.e. μ₁ = μ₂.

Hₐ: Men spend more than women on St. Patrick's day, i.e. μ₁ > μ₂.

The population standard deviations are not known.

So a t-distribution will be used to perform the test.

The test statistic for the test of difference between mean is:

$t=\frac{\bar x_{1}-\bar x_{2}}{\sqrt{\frac{s^{2}_{1}}{n_{1}}+\frac{s^{2}_{2}}{n_{2}}} }$

Given:

$\bar x_{1}=55\\s_{1}=18\\n_{1}=90\\\bar x_{1}=44\\s_{1}=16\\n_{1}=86$

Compute the value of the test statistic as follows:

$t=\frac{\bar x_{1}-\bar x_{2}}{\sqrt{\frac{s^{2}_{1}}{n_{1}}+\frac{s^{2}_{2}}{n_{2}}} }=\frac{55-44}{\sqrt{\frac{15^{2}}{90}+\frac{16^{2}}{86} }}=4.70$