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ANEK [815]
3 years ago
6

Eric runs 3 miles in 28 minutes. at the same rate how many miles would he run in 42 minutes?

Mathematics
1 answer:
Nastasia [14]3 years ago
7 0
3miles/ 28 minutes times 42 minutes is equal to 4.5 miles.

Therefore, Eric run 4.5 miles in 42 minutes.

Hopefully this helps!
You might be interested in
438 people signed up for a city soccer league. The league places 15 people on each team. How many teams are there?
valentinak56 [21]
438÷15= 22R8


15×10=150
15×10=150
15×2=30
5 0
3 years ago
Read 2 more answers
A train leaves at 10.12 and arrives at its destination at 11.18.
nadezda [96]

Answer:

67.3km/h

Step-by-step explanation:

Find the amount of time it took from 10:12 to 11:18.

Which is 66 minutes.

Find the average speed.

Formula of average speed =

Total distance/time

Which is,

74/66 = 1.121 (recurring decimal)

1.121 x 60 = 67.26km/h

= 67.3km/h (Estimated to 1 dp)

6 0
3 years ago
The half-life of iron-52 is approximately 8.3 hours.How much of a 13 gram sample of iron-52 would remain after 8 hours? Round to
Alexandra [31]

6.665 grams of the 13 grams remain after 8 hours.

<h3>How much of a 13 gram sample of iron-52 would remain after 8 hours?</h3>

The decay equation for the 13 grams of iron-52 is:

N(t) = 13g*e^{(-ln(2)/8.3h)*t}}

Where N is the amount of iron-52, and t is the time in years.

Where we used the fact that the half-life is exactly 8.3 hours.

Now, the amount that is left is given by N(8h), so we just need to replace the variable t by by 8 hours, so we get:

N(8h) = 13g*e^{(-ln(2)/8.3h)*8h}} = 6.665g

So 6.665 grams of the 13 grams remain after 8 hours.

If you want to learn more about half-life:

brainly.com/question/11152793

#SPJ1

5 0
2 years ago
Plz Helps, Lots of points in here
Vitek1552 [10]
Well.. instead of k he could have put 7. He should know that x and y are cut in half of their original values.
Hope I helped you!
4 0
3 years ago
Read 2 more answers
Question 2(Multiple Choice Worth 1 points) (06.01) Solve 2x + 5y = −13 3x − 4y = −8 (4, 1) (−4, 1) (4, −1) (−4, −1)
dlinn [17]
ANSWER

The solution is
(-4,-1)


EXPLANATION

The given equations are:

2x + 5y =  - 13...(1)

and

3x - 4y =  - 8...(2)


We multiply equation 1 by 3 to get,

6x + 15y =  - 39...(3)

We multiply equation 2 also by 2 to get,

6x - 8y =  - 16...(4)

We subtract equation 4 from equation 3 to get,


23y =  - 23
This implies that,

y =  - 1

We put this value of y into any of the equations say equation 2

3x - 4( - 1) =  - 8
Simplify

3x + 4 =  - 8
Group like terms
3x =  - 8 - 4
Simplify,

3x =  - 12

Divide both sides by 3 to get,

x =  - 4


Therefore the solution is
(-4,-1)

The correct answer is option D.
3 0
3 years ago
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