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3 years ago

I need the answer to these problem...I’ve been stuck on it the most.

Mathematics

1 answer:

crimeas [40]3 years ago

8 0

Answer:

1. 2x + 30° = 180°

2x = 150°

x = 75°

2. (2x - 24)° + (x + 12)° + (x - 8)° = 180°

4x - 20 = 180°

4x = 200

x = 50°

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SOVA2 [1]

Step-by-step explanation:

this is the answer of given question

5 0

3 years ago

David bought a computer than was 20% off the regular price of $ 1,080. if an 8% sales tax was added to the cost of the computer,

Ne4ueva [31]

Answer:

the anwser would be $933.12

Step-by-step explanation:

1080*.2= 216, so $216 was taken off

1080-216= 864 is the price now

864*.08= 69.12, The sales tax is $69.12

864+69.12= $933.12

The total price David paid for is $933.12

7 0

3 years ago

What is the value of x?<br><br> Enter your answer in the box.

omeli [17]

Answer:

x=28

Step-by-step explanation:

We can use proportions to solve this problem. Put the side of the small triangle over the side of the large triangle.

x 42

------ = ----------

x+10 42+15

x 42

------ = ----------

x+10 57

Solve using cross products

57x = 42(x+10)

Distribute

57x = 42x+420

Subtract 42x from each side

57x-42x = 42x-42x+420

15x = 420

Divide by 15

15x/15 = 420/15

x=28

3 0

3 years ago

A round swimming pool has a radius of 12 feet. What is its circumference?

Varvara68 [4.7K]

c=2πr

=2*3.14*12

=75.36 m

it's circumference is 75.36 m

3 0

3 years ago

Read 2 more answers

A large on-demand video streaming company is designing a large-scale survey to determine the mean amount of time corporate execu

Diano4ka-milaya [45]

Answer:

$n=(\frac{2.262(3)}{0.25})^2 =736.79 \approx 737$

So the answer for this case would be n=737 rounded up to the nearest integer

Step-by-step explanation:

We have the following info given:

$\bar X = 12$ the sample mean

$s = 3$ the sample deviation

$n = 10$ represent the sample size

The degrees of freedom are given by:

$df =n-1 =10-1=9$

The margin of error is given by this formula:

$ME=t_{\alpha/2}\frac{s}{\sqrt{n}}$ (a)

And on this case we have that ME =0.25 and we are interested in order to find the value of n, if we solve n from equation (a) we got:

$n=(\frac{t_{\alpha/2} s}{ME})^2$ (5)

The confidence level is 95% and the critical value for this case would be given by $t_{\alpha/2}=2.262$ , replacing into formula (5) we got:

$n=(\frac{2.262(3)}{0.25})^2 =736.79 \approx 737$

So the answer for this case would be n=737 rounded up to the nearest integer

7 0

3 years ago