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Virty [35]
3 years ago
7

Charlie ran 5 miles in 51.5 minutes. Use the equation 5r=51.5 to find r, the average rate he ran.

Mathematics
2 answers:
jenyasd209 [6]3 years ago
6 0
5r = 51.5
r = 51.5 / 5
r = 10.3
mixer [17]3 years ago
4 0
Hi! For this question, all you have to do is divide 51.5 and 5r by 5.

5r = 51.5
---    -----
5      5

The 5r will cancel out, and leave you with:
r = 10.3

Hope that helped!
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A car travels at a constant speed of 45 km per hour for 5 min each wheel has a radius of 25 centimeters calculate the number of
Arisa [49]

Answer:

477.47 revolutions

Step-by-step explanation:

From the information given:

The formula for calculating the circumference = 2π r

Given that the radius of each wheel = 25 centimeter

Then, the circumference = 2 π (25)

= 50π cm

The distance traveled in 5 minutes is as follows:

Given that:

The speed = 45 km/ hour

i.e.

1 hour = 45 km

In an hour, we have 60 minutes

So, 60 minutes = 45 km

1 minute = 45/60 = 0.75 km

To cm;

0.75 km = (0.75 × 1000) m = 750 m

750 m = 750 × 100 = 75,000 cm

∴

The number of revolution in 5 minutes sInce 1 revolution =  50π cm is:

=  75,000 cm/ 50π cm

= 477.47 revolutions in 5 minutes

6 0
2 years ago
1. Solve for x: 3x-3/5+2=5
WINSTONCH [101]

Answer:

x = 6/5

Step-by-step explanation:

3x - 3/5 + 2 = 5

<u>Add 3/5 and -2 on both sides.</u>

3x = 5 + 3/5 - 2

3x = 18/5

<u>Divide 3 on both sides.</u>

x = 18/5 ÷ 3

x = 18/15

x = 6/5

7 0
3 years ago
Read 2 more answers
HELP ILL GIVE YOU 15 POINTS !!!!!! ill mark you as brainliest too if its right
lesya692 [45]

Answer:

B.

Step-by-step explanation:

\frac{2}{5} *4=\frac{8}{5}x

\frac{2}{5} *-8=-\frac{16}{5}

8 0
2 years ago
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Troyanec [42]

Answer:

subtract the area of the rectangle from the area of the triangle

5 0
2 years ago
Can someone help me do this problem and explain it to me step by step? If so I’ll mark you brainliest
Advocard [28]

Answer:

-21

28

Step-by-step explanation:

1) if r = -4

Substitute r = -4 in 3r - 9

= 3 * (-4) - 9

= -12 - 9

= -21

2) ( 4 / 7 ) * x = 16

 4 * x = 16 * 7

 x = 4 * 7

 x = 28

7 0
2 years ago
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