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3 years ago

How do u solve this math problem ???

Mathematics

1 answer:

zhenek [66]3 years ago

7 0

Answer:

Step-by-step explanation:

Because that is the only graph that makes the relationship between the 2 propportional.

at 00 hours she makes 0 dollars

at 1 hour she makes 20 dollars

at 2 hours she makes 40

at 3 hours she makes 60

at 4 hours she makes 80

at 5 hours she mkes 100

at 6 hours she makes 120

and so on...

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What is the sum of 9/10+8/100

ArbitrLikvidat [17]

9/10 + 8/100

9/10 + 2×4/25×4

Common denominator is 50.

9/10 + 2/25.

5×9/5×10 + 2×2/2×25

45/50 + 4/50

= 49/50

6 0

3 years ago

Read 2 more answers

In the grade 9, the ratio of girls to boys is 17:8. What percent of the grade 9 are boys?

Maurinko [17]

Answer:

32%

Step-by-step explanation:

Let's say there are 17 girls and 8 boys. So there is 25 people in total.

8/25 = 32/100=32%

3 0

3 years ago

Use the confidence interval to find the estimated margin of error. Then find the sample mean. A biologist reports a confidence i

Pavlova-9 [17]

Answer:

$\bar X = \frac{Lower +Upper}{2}$

$\bar X= \frac{1.9+3.3}{2}= 2.6$

And the margin of error with this one:

$\bar X = \frac{Upper-Lower}{2}$

$ME = \frac{3.3-1.9}{2}= 0.7$

Step-by-step explanation:

Assuming that the parameter of interest is the sample mean $\mu$ . And we can estimate this parameter with a confidence interval given by this formula:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

For this case the confidence interval is given by (1.9, 3.3)

Since the confidence interval is symmetrical we can estimate the sample mean with this formula:

$\bar X = \frac{Lower +Upper}{2}$

$\bar X= \frac{1.9+3.3}{2}= 2.6$

And the margin of error with this one:

$\bar X = \frac{Upper-Lower}{2}$

$ME = \frac{3.3-1.9}{2}= 0.7$

7 0

3 years ago

531 times what equals 5,310

Leya [2.2K]

Answer:

531 x 10 = 5,310

4 0

3 years ago

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A tomato is cut into 8 slices. If each slice contains 0.12 grams of fiber, how can rounding be used to estimate the amount of fi

aliya0001 [1]

Answer:

Step-by-step explanation:

5 0

3 years ago