MATHEMATICS MIDDLE SCHOOL

14. 30/r
r = 5
Need help!?

Answers

Answer 1
Answer:

Answer:

The expression = 6

Step-by-step explanation:

The expression is 30/r

30/r

Substitute r=5

30/5

6

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What is 1 3/4 - 2/3?

Answers

Your answer is 1.08333333333 by putting it in graph form and doing high heel shoe method.
2.583333333. First you divide them both and then subtract

Lori is running a marathon, which is 26.2 miles long. So far, she has run one-tenth of the marathon. How far has Lori run? (from the book)

Answers

to find how long Lori has run do 1/10 x 26.2
1/10 x 131/5
= (1x131) / (10x5)
= 131/50 or 2 and 31/50 miles long
She has 23.58 miles left to run because you multiply 26.2×0.1 and get 23.58.

the ratio of boys to girl in Mr. Claytons class is 2:3. If there are 30 total students how many more girls are in the class than boys

Answers

Number of girls :
30*3/5=18

Number of boys :
30*2/5=12

18-12=6

6 more girls than boys.
Well, if there are two boys for every three girls then we multiply 30 by 3.

30×5=90.

Next, we divide 90 by 5.

90÷5=18.

Then we subtract 18 from 30.

30-18=12.

That means we have 12 boys and 18 girls.

Finally, we subtract 18 from 12.

18-12=6.

There are 6 more boys than girls.

Have a nice day! :)

Michael has 4 red shirts, 3 green shirts, and 5 blue shirts in his closet. If he randomly selects a shirt what is the probability that he chooses blue or red?

Answers

Answer:

3/4

Step-by-step explanation:

Answer:

3/4 is the correct answer

Step-by-step explanation:

I just did the assignment and got 100

Find the value for θ.sinθ=cos(θ−18.5)
Question 6 options:

35.75°


71.5°


54.25°


161.5°

Answers

Answer:

\theta=54.25\°

Step-by-step explanation:

we know that

When the sine of angle X is equal to the cosine of angle Y, then angle X and angle Y are complementary angles

so

X+Y=90\°----> equation A

In this problem

X=\theta

Y=(\theta-18.5)

substitute in the equation A

\theta\°+(\theta-18.5)\°=90\°

2\theta=90+18.5

2\theta=108.5

\theta=54.25\°

A skateboard that sells for $65 is on sale for 15% off. Find the sale price?

Answers

original price:          $65        
discount:         15% off        
sale price:         ?        

There are two ways you can solve this problem:

Here's the longer way (by one step):
65 * .15 (15% in decimal form) = 9.75
65 - 9.75 = 55.25
sale price = $55.25

Here's the method that's one step shorter:
65 * .85 (100-15 ~ because it's 15%[15/100] off) = 55.25
sale price = $55.25

Either way works for solving discounts/sales. 
The skateboard now sells for 55.25. Hope this helps.
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