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irinina [24]
3 years ago
9

A cyclist rides her bike at a rate of 8 miles per hour. What is this rate in kilometers per hour? How many kilometers will the c

yclist travel in 4 hours? In your computations, assume that 1 mile is equal to 1.6 kilometers. Do not round your answers.
Mathematics
2 answers:
alina1380 [7]3 years ago
6 0
1 mile is equal to 1.6 kilometers, so 8 miles (using a direct proportion) should be equal to 8 * 1.6 = 12.8 kilometers. The cyclist rides at 12.8 kilometers per hour. In four hours, the cyclist would have rode 12.8 * 4 = 48 + 3.2 = 51.2 kilometers.
musickatia [10]3 years ago
4 0

Answer:

51.2

Step-by-step explanation:

just took the test

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Lola's office recycled a total of 27 kilograms of paper over 9 weeks. How many weeks will it take Lola's office to recycle a tot
Bess [88]

Answer:

14

Step-by-step explanation:

First divide to get unit rate:

27/9= 3

Then divide.....again:

42/3= 14

Hope this helps! :)

Pls mark brainliest if correct:)

5 0
3 years ago
If AD = 5x - 7 and AB = 2x +11, what is the length of AD
Norma-Jean [14]

Answer:

The length of AD is 6.

Step-by-step explanation:

Solve.

5x - 7 = 2x + 11 \\  \frac{ \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  - 2x \:  \:  \:  \:  \:  \:  =  - 2x \:  \:    \:  \:  \:   \:  \:  \:  \:  \:  \:  \:  \:  \: \:  \:  \:  \:  \:  \:  \:  }{3x - 7 = 11}  \\  \frac{  \:  \:  \:  \:  \:  \:  \:  \:  \:  + 7  =  + 7}{3x = 18}  \\  \\  \frac{3x}{3}  =  \frac{18}{3}   \\  \\ x = 6

Now plug in:

5x - 7 \\ 5(6) - 7 \\ 30 - 7 \\ 23

^Therefore, your result^

8 0
3 years ago
A young oak tree is planted when it is 5 cm tall. It grows 3 cm every month. Write an equation to describe its growth
Naily [24]

Answer:

y=3x+5

Since it's already 5 cm we have +5

every month it would go up by 3 cm so we have 3 and x is to represent the # of months.

8 0
3 years ago
Josh invested $12,000 in mutual funds and received a sum of $20,000 at the end of the investment period. Calculate the ROI.
tresset_1 [31]

Answer:

ROI = 66.67%

Step-by-step explanation:

Given:

josh investment= $12,000

Received sum= $20,000

ROI=?

ROI is the return on investment that gives the loss or gain in any investment and is calculated by the following formula:

ROI= (interest/investment) x 100

Finding interest:

interests= received sum- investment

              = 20,000-12,000

              =8000

Putting values in ROI formula we get:

ROI= (8000/12000) x 100

      = 66.67%

Hence the return on investment is 66.67%!

3 0
3 years ago
Lifetime Fitness charges $90 a month for membership plus $50 per session with a trainer. Which equation can be used to determine
Taya2010 [7]

Answer:

50x / 30/x i think

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
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