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il63 [147K]
3 years ago
13

Lin runs 5 laps around a track in 6 minutes If Lin runs 21 laps at the same rate, how long does it take her

Mathematics
1 answer:
nydimaria [60]3 years ago
4 0

Answer:

It would take her 25.2 minutes

Step-by-step explanation:

6 divided by 5 gives you the 1.2 minutes

Then I would do 1.2 minutes for each lap  * 21 laps = 25.2 minutes

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Someone please help! ATTACHMENT (just the circled one)
Elza [17]

4 (3x+9)-3(5y+7) =11

distribute

12x +36 -15y -21 =11

12x -15y +15 =11

subtract 15 from each side

12x -15y =-4

subtract 12x from each side

-15y= - 12x-4

divide by -15

y = -12/-15 x -4/-15

y = 4/5 x  + 4/15

slope = 4/5

y intercept = 4/15

6 0
2 years ago
A bag contains 6 green marbles, 5 blue, and 9 red. What is the probability that you will select two green marbles from the bag?
kogti [31]

Answer:

2/20

Step-by-step explanation:

if you add all of the marbles you will get 20 marbles in total.

8 0
2 years ago
What are the steps to solve 7÷2 1/3
igomit [66]
You have to make 7 into 21/3. Then change 2 1/3 into 7/3. Then divide 21/3 abd 7/3 which equals 3/3 which equals 1.
3 0
3 years ago
g Make a decision about the given claim. Use only the rare event​ rule, and make subjective estimates to determine whether event
vagabundo [1.1K]

Answer:

There is not sufficient evidence to support the claim.

Step-by-step explanation:

The claim to be tested is:

The mean respiration rate (in breaths per minute) of students in a large statistics class is less than 32.

To test this claim the hypothesis can be defined as follows:

<em>H₀</em>: The mean respiration rate of students is 32, i.e. <em>μ</em> = 32.

<em>Hₐ</em>: The mean respiration rate of students is less than 32, i.e. <em>μ</em> < 32.

The sample mean  respiration rate of students is 31.3.

According to the claim the sample mean is less than 32.

The sample mean value is not unusual if the claim is true, and the sample mean value is also not unusual if the claim is false.

Thus, there is not sufficient evidence to support the claim.

7 0
2 years ago
HELPHELPHELPHELPHELPHELPHELP​
viva [34]

Answer:

the answer is 75

Step-by-step explanation:

225 ÷ 3

75

5 0
3 years ago
Read 2 more answers
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