All categories

2 years ago

Order the steps to solve -3x + 2.4 = 19.2.

Mathematics

1 answer:

tankabanditka [31]2 years ago

8 0

Answer:

1. Subtract 2.4 from both sides

2.Simplify to -3x=16.8

3.Divide both sides by -3

4. Simplify to x=-5.6

You might be interested in

Help I just don’t know what I’m supposed to do?

Sidana [21]

Multiple each number I think

4 0

3 years ago

Pls help quickly I’ll give u brainlyist btw it’s 7th grade math

erica [24]

Answer:

2 and 5

Step-by-step explanation:

3 0

3 years ago

A random sample of 15 employees was selected. The average age in the sample was 31 years with a variance of 49 years. Assuming a

vova2212 [387]

Answer:

Assuming ages are normally distributed, the 98% confidence interval for the population average age is [26.3, 35.7].

Step-by-step explanation:

We have to construct a 98% confidence interval for the mean.

The information we have is:

- Sample mean: 31

- Variance: 49

- Sample size: 15

- The age is normally distributed.

We know that the degrees of freedom are

$k=n-1=15-1=14$

Then, the t-value for a 98% CI is t=2.625 (according to the t-table).

The standard deviation can be estimated from the variance as:

$s=\sqrt {s^2}=\sqrt{49}=7$

The margin of error is:

$E=t_{14}*s/\sqrt{n}\\\\E=2.625*7/\sqrt{15}=18.375/3.873=4.7$

Then, the CI can be constructed as:

$M-t*s/\sqrt{n}\leq\mu\leq M+t*s/\sqrt{n}\\\\31-4.7\leq \mu \leq 31+4.7\\\\26.3\leq \mu \leq 35.7$

5 0

3 years ago

3. guarts. equal. cups

Gnom [1K]

There are 4 cups in 1 quart.

4 x 3 = 12

3 quarts = 12 cups

Hope this helps. :)

5 0

2 years ago

Read 2 more answers

I don't know if it's correct

Bond [772]

Hello, This is correct.

first one is whole numbers

the third one natural numbers

the fourth are complex numbers

The last one is irrational numbers

8 0

3 years ago