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2 years ago

Construct a triangle ABC, with BC = 7.5, AC = 5cm and angle BCA = 120°

Mathematics

1 answer:

Vinil7 [7]2 years ago

3 0

Answer:

Step-by-step explanation:

It is hard to answer this but just draw the triangle ABC, and put in the side lengths, and angles.

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Round the digit greater than 10, and estimate the answer.<br> 8,572 x 7=<br> P

luda_lava [24]

Answer:

60000

Step-by-step explanation:

8572x7= 60004...

Rounded to the nearest 10 (Which I assume you wanted to happen) is: 60000

[If I am wrong I am very sorry, please message me]

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2 years ago

In order to estimate the average electric usage per month, a sample of 81 houses was selected and the electric usage was determi

lana [24]

Answer:

Confidence interval: (1760,1956)

Step-by-step explanation:

We are given the following information in the question:

Sample size, n = 81

Sample mean =

$\bar{x} = 1858 \text{ kWh}$

Population standard deviation =

$\sigma = 450 \text{ kilowatt-hours}$

Confidence Level = 95%

Significance level = 5% = 0.05

Confidence interval:

$\bar{x} \pm z_{critical}\displaystyle\frac{\sigma}{\sqrt{n}}$

Putting the values, we get,

$z_{critical}\text{ at}~\alpha_{0.05} = \pm 1.96$

$1858 \pm 1.96(\displaystyle\frac{450}{\sqrt{81}} ) = 1858 \pm 98 = (1760,1956)$

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3 years ago

HELP ME PLZ. 2. Mrs. Wilson's dad is looking for a new fishing pole for an upcoming trip to the Grand

givi [52]

The store cost .057 cents more.
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2 years ago

You usually buy a 16.5-ounce bottle of shampoo. There is a new bottle that says it gives you 30% more free.

Katarina [22]

Answer:

$\frac{x-16.5}{16.5}=0.30$

Hopefully, this is your desired setup. (I noticed the formula you have to fill in there.)

Have a good day.

Step-by-step explanation:

Hi.

You could use the percent change formula.

Since we know it is a percent increase then we will do new-old instead of old-new:

$\frac{\text{new}-\text{old}}{\old}$

x is the new amount of shampoo.

16.5 is the original amount (old) of shampoo.

The percent increase is 30%=0.30 .

So we have the following equation:

$\frac{x-16.5}{16.5}=0.30$

We could have found the equation like this:

$16.5+16.5(0.30)=x$

Subtract 16.5 on both sides:

$16.5(0.30)=x-16.5$

Divide both sides by 16.5:

$0.30=\frac{x-16.5}{16.5}$

By us of symmetric property of equality:

$\frac{x-16.5}{16.5}=0.30$

5 0

3 years ago

Read 2 more answers

What is the y-intercept of the line y=7?

Maru [420]

Answer:

Step-by-step explanation:

The value of the y-intercept is (0,7)

So the y intercept is 0,7

3 0

2 years ago

Construct a triangle ABC, with BC = 7.5, AC = 5cm and angle BCA = 120°​

Construct a triangle ABC, with BC = 7.5, AC = 5cm and angle BCA = 120°