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3 years ago

What improper fraction or mixed number is 30/20 in simplest form

Mathematics

2 answers:

Sedbober [7]3 years ago

8 0

1/2 is the simplest form for 30/20

True [87]3 years ago

3 0

30/20= 1 and 10/20 in simplest form that is 1 and 1/2

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An interest-free period during which a credit card owner can pay off a balance

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3 years ago

The results of a survey indicate 70% of seventh-graders watch at least one movie during the weekend. Based on this survey of a g

marusya05 [52]

Answer:

35 students

Step-by-step explanation:

70% of 50 = 0.7×50 = 35

5 0

3 years ago

you want to create a 99 confidence interval with a margin of error of 25 assuming that the population standard deviation is equa

Ahat [919]

Answer:

The minimum sample size is 239.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1 - 0.99}{2} = 0.005$

Now, we have to find z in the Z-table as such z has a p-value of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.005 = 0.995$ , so Z = 2.575.

Now, find the margin of error M as such

$M = z\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

Population standard deviation is equal to 1.5

This means that $\sigma = 1.5$

Margin of error of 0.25

This means that $M = 0.25$

What's the minimum size of the sample?

$M = z\frac{\sigma}{\sqrt{n}}$

$0.25 = 2.575\frac{1.5}{\sqrt{n}}$

$0.25\sqrt{n} = 2.575*1.5$

$\sqrt{n} = \frac{2.575*1.5}{0.25}$

$(\sqrt{n})^2 = (\frac{2.575*1.5}{0.25})^2$

$n = 238.7$

Rounding up:

The minimum sample size is 239.

4 0

3 years ago

5x + 3y = 30<br> What is the x and y intercept

Mrac [35]

The x-intercept is + 6 and the y-intercept is + 10

4 0

3 years ago

Read 2 more answers

The table can be used to determine the solution to the system of equations, 2y − x = 8, and y − 2x = −5. Which solution can be u

SIZIF [17.4K]

The answer is (6, 7)

This is the system of two equations:
<span>2y − x = 8
y − 2x = −5
_____
Express the second equation in the term of y:
2y - x = 8
y = 2x - 5
_____
Substitute y in the first equation:
2(2x - 5) - x = 8
4x - 10 - x = 8
4x - x = 10 + 8
3x = 18
x = 18/3
x = 6

Since x = 6 and y = 2x - 5, then:
y = 2 * 6 - 5
y = 12 - 5
y = 7

Therefore, (x, y) = (6, 7)</span>

4 0

3 years ago