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3 years ago

7

)) Angela has 4 packs of pencils with 9 pencils in each pack. She divides the pencils equally among 3 friends. How many pencils

will each friend get? A9. B 12 C 33 D 36

2 answers:

Karolina [17]3 years ago

6 0

Answer: B.12

Step-by-step explanation:

marta [7]3 years ago

5 0

Answer: B. 12

Step-by-step explanation: 9 x 4 = 36 then do 36 divided by 3 = 12 there is your answer!

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An athlete completes a race in 55.72 seconds. How many times greater is the digit in the tens place than the digit in the ones p

MArishka [77]

As they are the same the answer is 1 times

8 0

3 years ago

Each side of a square office is 8 yards long. It will cost $65.00 per square yard to replace the carpet in the office. What woul

Sati [7]

Answer:

520 because 65 x 8 is 520

Step-by-step explanation:

7 0

3 years ago

An article claims that 12% of trees are infested by a bark beetle. A random sample of 1,000 trees were tested for traces of the

inna [77]

Answer: 0.6812

Step-by-step explanation:

Let p be the population proportion of trees are infested by a bark beetle.

As per given: p= 12%= 0.12

Sample size : n= 1000

Number of trees affected in sample = 1000

Sample proportion of trees are infested by a bark beetle. = $\hat{p}=\dfrac{127}{1000}=0.127$

Now, the z-test statistic : $z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}$

So, $z=\dfrac{0.127-0.12}{\sqrt{\dfrac{0.12\times 0.88}{1000}}}$

$z=\dfrac{0.007}{\sqrt{\dfrac{0.1056}{1000}}}\\\\\\=\dfrac{0.007}{\sqrt{0.0001056}}\\\\\\=\dfrac{0.007}{0.010276}\approx0.6812$

Hence, the value of the z-test statistic = 0.6812 .

7 0

3 years ago

What's the value of x y z

lions [1.4K]

They are algebraic symbols or known as unknown number. There is no true value for them. The value of algebraic symbols are based on equations

ie. 1+x = 2

First, we isolate the x by canceling the +1 FROM BOTH SIDES(Balance method) by -1 ON BOTH SIDES.

1+x-1 = 2-1

So we are left with the x on the left side, and a single number on the right side. Therefore, our calculation is complete.

x = 1

More complex cases would be

2y-3 = 45

First, we need to isolate the algebraic symbol, which is 2y (yx2) by +3 ON BOTH SIDES

2y-3+3 = 45+3

2y = 48

WE ARE NOT DONE! 2y=48 is still an equation. Therefore, to isolate the y, we need to divide BOTH SIDES by 2

2y/2 = 48/2

y = 24

There is no true or absolute or definite value for algebraic symbols like x,y,z,a,c,t,h,d etc. They are used to represent unknown numbers.

Hope this helped!

8 0

3 years ago

In politics, marketing, etc. We often want to estimate a percentage or proportion p. One calculation in statistical polling is t

inessss [21]

Answer: |p-72% |≤ 4%

Step-by-step explanation:

Let p be the population proportion.

The absolute inequality about p using an absolute value inequality.:

$|p-\hat{p}| \leq E$ , where E = margin of error, $\hat{p}$ = sample proportion

Given: A poll result of 72% with a margin of error of 4% indicates that p is most likely to be between 68% and 76% .

|p-72% |≤ 4%

⇒ 72% - 4% ≤ p ≤ 72% +4%

⇒ 68% ≤ p ≤ 76%.

i.e. p is most likely to be between 68% and 76% (.

6 0

3 years ago