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2 years ago

Which choice gives the solution of this inequality? 3t + 7 < 28

Mathematics

1 answer:

Butoxors [25]2 years ago

5 0

Answer:7

Step-by-step explanation:

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How do you solve 2/5 (c+8.5) =18

Orlov [11]

Solve for c by simplifying both sides of the equation, then isolating the variable.

C=36.5

4 0

3 years ago

A dog breeder would like to know how many Dalmatian puppies are typically born in a litter. He conducts some research and select

podryga [215]

Answer:

c. 6.2 ± 2.626(0.21)

Step-by-step explanation:

We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 101 - 1 = 100

99% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 100 degrees of freedom(y-axis) and a confidence level of $1 - \frac{1 - 0.99}{2} = 0.995$ . So we have T = 2.626

The confidence interval is:

$\overline{x} \pm M$

In which $\overline{x}$ is the sample mean while M is the margin of error.

The distribution of the number of puppies born per litter was skewed left with a mean of 6.2 puppies born per litter.

This means that $\overline{x} = 6.2$

The margin of error is:

$M = T\frac{s}{\sqrt{n}} = 2.626\frac{2.1}{\sqrt{101}} = 2.626(0.21)$

In which s is the standard deviation of the sample and n is the size of the sample.

Thus, the confidence interval is:

$\overline{x} \pm M = 6.2 \pm 2.626(0.21)$

And the correct answer is given by option c.

5 0

3 years ago

What is 14/15 over 4/7 equal to

Aneli [31]

Answer:

$\frac{0.93}{0.57}$

Step-by-step explanation:

Simplify both of the fractions so $\frac{14}{15}$ to get 0.93 and $\frac{4}{7}$ to get 0.57.

Then you put them back into fraction form.

5 0

3 years ago

I need help. Work has to be shown but i don’t know how to do them

mote1985 [20]

Step-by-step explanation:

1% of 500 is 5 so multiply 5 by 8 for one year. which is 40 so multiply that by 2.

1% of 500 = 5

5 × 8 = 40

40 × 2 = 80

1% of 1000 = 10

10 × 5 = 50

50 × 3 = 150

12 months = 6%

6/12 = 1 month

0.5 = 1 month

0.5 × 9 = 4.5 (the amount of interest for 9 months.)

800 × 4.5% = 36

12 months = 7%

7/12 = 1 month ( i'll leave this in fraction form because of the decimal points.)

7/12 x 8 = 4.666667 or 4.7 rounded.

1200 × 4.7% = 56.40

8 0

2 years ago

Three friends wor on a project .cindy does 4/8 of the project kim does 3/8 of the project sandy does 1/8 of rhe project how mich

Oliga [24]

You just have to add the three

4/8+3/8+1/8=8/8

8/8=100%

So they finished the whole project

Hope this helps!

4 0

3 years ago