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3 years ago

15

Annika's flight to ottowa took 45min. The bus ride to the airport took 3 hours. Write a ratio to compare the time on the bus to

the time on the plane.

1 answer:

nekit [7.7K]3 years ago

6 0

Answer:

yellow to the max dont re port

Step-by-step explanation:

none dont

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What are the answers and work for 15, 18, and 21

Sholpan [36]

To solve equations such as the ones you listed above, our end goal is to isolate the variable (the letter that represents an unknown value).

Let’s begin with Number 15.

a/5 - 2 = 9

Due to the reverse order of operations, we should first add 2 to both sides of the equation.

a/5 = 11

To solve, we should multiply both sides by 5 to get rid of the denominator on the variable a.

a = 55 (answer)

Next, we can move onto number 18.

2/3g + 6 = -12

To solve this equation, we should begin by subtracting 6 from both sides.

2/3g = -18

Next, we can get the variable g alone by multiplying both sides by 3/2 (this will cancel out the coefficient of 2/3 on the variable g).

g = -27 (answer)

Finally, we can solve number 21 in a similar manner.

(c-5)/4 = 3

To solve this problem, we should first multiply both sides by 4 to get rid of the denominator on the variable c.

c - 5 = 12

To finish our simplification, we should add 5 to both sides of the equation to get the variable c completely alone.

c = 17 (answer)

Therefore, your answers to questions 15, 18, and 21, are 55, -27, and 17, respectively.

Hope this helps!

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3 years ago

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Im not too sure about my answer so if you could please help me. its the last question

Ilya [14]

Answer:

I believe the answer is A

Step-by-step explanation:

Distributive property

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Large growth industries indicate careers will be

JulijaS [17]

I think holding steady I’m not sure!

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Answer the question below in the image

Goryan [66]

Answer:

D

Step-by-step explanation:

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3 years ago

Consider a drug testing company that provides a test for marijuana usage. Among 310 tested subjects, results from 28 subjects w

Naily [24]

Answer:

$z=\frac{0.0903 -0.1}{\sqrt{\frac{0.1(1-0.1)}{310}}}=-0.569$

The p value for this case can be calculated with this probability:

$p_v =P(z$

Since the p value is higher than significance level we don't have enough evidence to conclude that the true proportion is significantly less than 0.1

Step-by-step explanation:

Information given

n=310 represent th sample selected

X=28 represent the subjects wrong

$\hat p=\frac{28}{310}=0.0903$ estimated proportion of subjects wrong

$p_o=0.1$ is the value to verify

$\alpha=0.05$ represent the significance level

t would represent the statistic

$p_v$ represent the p value

System of hypothesis

We want to test the claim that less than 10 percent of the test results are wrong ,and the hypothesis are:

Null hypothesis: $p\geq 0.1$

Alternative hypothesis: $p < 0.1$

The statistic is given by:

$z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}}$ (1)

Replacing the info we got:

$z=\frac{0.0903 -0.1}{\sqrt{\frac{0.1(1-0.1)}{310}}}=-0.569$

The p value for this case can be calculated with this probability:

$p_v =P(z$

Since the p value is higher than significance level we don't have enough evidence to conclude that the true proportion is significantly less than 0.1

5 0

3 years ago