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2 years ago

Gena wants to estimate the quotient of –21.87 divided by 4.79. Which expression shows the estimate using front-end estimation?

Mathematics

1 answer:

storchak [24]2 years ago

8 0

Answer:

I believe its Negative 21 divided by 5

Step-by-step explanation:

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A professor records the difference between the marks scored by the students in the class test last week and those scored in the

dezoksy [38]

Answer: $(10.82\ , 13.18)$

Step-by-step explanation:

The confidence interval for population mean is given by :-

$\mu\pm\ z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$

Given : Sample size : n= 35 , large sample (n>30)

Mean difference : $\overline{x}=12$

Standard deviation : $\sigma=3$

Significance level : $\alpha=- 1-0.999=0.001$

Critical value : $z_{\alpha/2}=z_{0.0005}=3.4807567$

Now, the 99.9% confidence interval for the mean difference between the marks scored last week and marks scored this week by all the students will be :-

$12\pm\ (3.4807567)\dfrac{2}{\sqrt{35}}\\\\=12\pm1.18\\\\=(10.82\ , 13.18)$

Hence, the 99.9% confidence interval for the mean difference between the marks scored last week and marks scored this week by all the students = $(10.82\ , 13.18)$

4 0

3 years ago

Some one help please algebra ..<br>-6=3x-6y<br>4x=4+5x

yanalaym [24]

X=2y-2

x=-4

hope i helped

5 0

3 years ago

Read 2 more answers

Couldn't do this one help needed

Paladinen [302]

Answer:

shown below.

Step-by-step explanation:

v = 150 since 180 - 30

for w we need 2y and x. the base angles of the triangle are 30 and 50 therefore x = 100. 2y = 30 because corresponding angles. ergo, w = 50

x = 100

y = 15

z = 50

5 0

2 years ago

Please help me solve this.

yuradex [85]

Answer:

x = -64

Step-by-step explanation:

Step 1: Write out equation

9 - 3/4x = 57

Step 2: Subtract 9 on both sides

-3/4x = 48

Step 3: Multiply both sides by -4/3

x = -64

5 0

3 years ago

Write 7/12 as a decimal. If necessary, use a bar to indicate which digit or group of digits repeats.

rodikova [14]

Answer:

0.538

Step-by-step explanation:

7 divided by 12 = 0.538

5 0

2 years ago