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3 years ago

Please help meeeeeeeeee

Mathematics

2 answers:

11111nata11111 [884]3 years ago

7 0

Answer:

Step-by-step explanation:

To find the area of a rectangle you have to multiply the base times the height. So you would do 4 x 2 to equal 8.

Hope this helps :)

Oxana [17]3 years ago

4 0

The answer is 8 because to find the area the equation would be L x W so 4 x 2

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Solve the equation.<br><br> x2 = 160

Airida [17]

Divide both side by 2 ad you get x=80

6 0

3 years ago

Camille uses 7.9 pints of blue paint and white paint to paint her bedroom walls. 1/4 of this amount is blue paint, and the rest

Mila [183]

First you do 7.9/ 1/4, that gets you 1.975. that is how much blue paint there is. Then you do 7.9-1.975= 5.925, which is how much white paint she used. So in total she used 1.975 pints of blue paint, and 5.925 pints of white paint.

7 0

3 years ago

Jeff is studying abroad in Sussex England this summer. He wants to visit a local museum outside of town this weekend. A taxi cab

Vesnalui [34]

Answer:

if it's less than 7.66km use Royal, if more than 7.66 use Queen's

Step-by-step explanation:

To get the answer you can set up mutliple equations

For Queen's Cab Company

2.70 + 0.20x = ?

for Royal Cab Company

1.55 + 0.35x = ?

Since you didn't give a distance which is what will determine which is cheaper we can solve as a set of equations.

2.70 + 0.20x = 1.55 + 0.35x

1.15 = .15x

x = 7.66

So this lets you know that at 7.66 km Royal cab company becomes more expensive due to their pence per km.

So if it's less than 7.66km use Royal, if more use Queen's

5 0

3 years ago

DO NOT COMMENT IF YOU AREN’T GOING TO HELP. Create a real-life situation and create a system and show how it might be modeled al

olya-2409 [2.1K]

Answer:

in today's market supply and demand fluctuates. for example the recent demand for apple air pods. They came out in 2016 but were not very popular,But with the sudden increase in demand the amount sold has increased by 75 percent from 2017 to 2018. this could be graphed using the equation. f(x)=1.75x+16

with each unit on the graph equaling 1 million on the y axis

and the amount of years along the x but you must start at 16 along the x axis

in 2017 there was 16 million air pods sold and in December 2018 28 million were sold during that year

Step-by-step explanation:

8 0

3 years ago

We guess, based on historical data, that 30% of graduating high-school seniors in a large city will have completed a first-year

Annette [7]

Answer:

$n=\frac{0.3(1-0.3)}{(\frac{0.025}{1.96})^2}=1290.78$

And rounded up we have that n=1291

Step-by-step explanation:

1) Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The population proportion have the following distribution

$p \sim N(p,\sqrt{\frac{p(1-p)}{n}})$

2) Solution to the problem

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 95% of confidence, our significance level would be given by $\alpha=1-0.95=0.05$ and $\alpha/2 =0.025$ . And the critical value would be given by: