MATHEMATICS MIDDLE SCHOOL

405 rotations in 5 minutes finding the unit rate please help

Answers

Answer 1
Answer: 405/5=81 rotations per minute
405/60 seconds times 5 minutes=405/300=1 7/20 rotations per second

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Determine the time needed to deliver 72 papers at rate of 9 papers in 18 minutes.

Am I right?????/////

Answers

Yes u are right nice work
Sorry didn't see the whole questions

Carl has 200 songs on his MP3 player of these songs 24 are country songs what is the percent of country songs he has

Answers

It would be 12 songs.

Divide 24 by 200.

24÷200=0.12

Multiply by 100 because percentages are out of 100.

0.12×100= 12

12%
200 \ songs, 24 \ country \ songs \n\ \frac {24}{200} = Percent \ Of \ Country \ Songs \n\ (24)/(200) --\ \textgreater \ (12)/(100) \n\ 12 \%

Using the slope formula for the points (1, 5) and (2, -2), what would the denominator be?-2 - 5
-2 - 1
2 - 1
2 - 5

Answers

Answer:

2-1

Step-by-step explanation:

Answer:

1

Step-by-step explanation:

Moving from (1, 5) to (2, -2), x increases by 1 and y decreases by 7.  The slope of the line connecting these two points has the slope m = rise / run = -7 / 1, or just -7.

Alternatively, using the slope formula,

        5-[-2]           7

m = ------------ = -------- = (-7/1).  The denominator would be 1.

         1 - 2            -1

How many times greater is the value of the 5 in 150,740 than the value of the 5 in 10,452?

Answers

1,000 greater is the value of the 5 in 150,740 than the value of the 5 in 10,452.

What is Algebra?

The analysis of mathematical representations is algebra, and the handling of those symbols is logic.

Division means the separation of something into different parts, sharing of something among different people, places, etc.

The numbers are 150,740 and 10,452.

Then the value of 5 of each number will be

50,000 and 50

Then the ratio of the number will be

⇒ 50,000 / 50

⇒ 1,000

Then 1,000 greater is the value of the 5 in 150,740 than the value of the 5 in 10,452.

More about the Algebra link is given below.

brainly.com/question/953809

#SPJ5

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Bought computer for $500. Marked down $50. Plus a 25% discount off original price. What is the original price?

Answers

so 500+50=550

550=25-100=75%

550=75%
multiply both sdies yb 4
2200=300%
divide by 3
733.333=100%

the origonal price=$733.33
500 + 50 = 550
500 is 25% of what number?
2000 + 550 = 2550 dollars

Karen is seven years older than suzanne.Four years ago,karen was twice as old as suzanne was.How are they now?

Answers

K-Karen\ age\nS-Suzanne\ age\nK-4-Karen\ age\ 4\ years\ ago\nS-4-Suzanne\ age\ 4\ years\ ago\n\n \left\{\begin{array}{ccc}K=S+7\nK-4=2(S-4)\end{array}\right\n\left\{\begin{array}{ccc}K=S+7&(1)\nK-4=2S-8&(2)\end{array}\right\n\nsubtitute\ (1)\ to\ (2):\n\n(S+7)-4=2S-8\nS+7-4=2S-8\nS+3=2S-8\ \ \ \ |subtract\ 3\ from\ both\ sides\nS=2S-11\ \ \ |subtract\ 2S\ from\ both\ sides\n-S=-11\n\boxed{S=11}

Put\ the\ value\ of\ S\ to\ (1):\n\nK=11+7\n\boxed{K=18}\n\n\left\{\begin{array}{ccc}K=18\nS=11\end{array}\right\n\nAnswer:\ Karen\ does\ 18\ years\ and\ Susanne\ does\ 11\ years.
karen age=k
suzanne age=s

karen (k) is (=) 7 years older (+7) than suzanne(s)
k=7+s

four year ago means
s-4 and k-4

four years ago (-4 to all) karen (k) was (=) twice (2 times) suzzane (s)
k-4=2(s-4)
distribute
k-4=2s-8
add 4 to both sides
k=2s-4
we know that k=7+s so subsitute 7+s for k
7+s=2s-4
add 4 to both sides
11+s=2s
subtract s from both sides
11=s

suzanne=11
subsitute 11 for s in k=s+7

k=7+11
k=18


karen=18
suzanne=11
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