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Anna007 [38]
2 years ago
12

Jesper can run 6 miles in 45 minutes. He is thinking about running in two different races, a 9-mile race and a 15-mile race. At

his current rate, how many more minutes will it take Jesper to complete the 15-mile race than the 9-mile race?
Mathematics
1 answer:
marin [14]2 years ago
4 0

Find minutes per mile by dividing time by distance:

45 minutes / 6 miles = 7.5 minutes per mile

Now multiply his speed by each distance:

7.5 x 9 = 67.5 minutes

7.5 x 15 = 112.5 minutes

Now subtract the two:

112.5 - 67.5 = 45 minutes more

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Find the exact sum of the arithmetic series <br><br> 6+3.8+⋯−29.2
matrenka [14]

Answer:

-197.2

Step-by-step explanation:

Since it is arithmetic series, first find the difference d between the two know series.

3.8 - 6 = - 2.2

d = -2.2

a = 6

Tn = -29.2

Looking for the n term, use the linear method.

Tn = a+( n - 1)d

Substitute all the parameters

-29.2 = 6+( n - 1 ) -2.2

-29.2 = 6 - 2.2n + 2.2

- 29.2 = 8.2 - 2.2n

-29.2 - 8.2 = - 2.2n

-37.4 = -2.2n

n = 37.4/ 2.2

n = 17 terms.

To Find the exact sum of the arithmetic series, use the sum formula below

Sm = n/2( 2a + (n - 1)d)

Sm = 17/2( 2 × 6 + ( 17 - 1 ) -2.2

Sm = 17/2(12 - 35.2)

Sm = 8.5( - 23.2)

Sm = - 197.2

Therefore, the exact sum of the arithmetic series is -197.2

5 0
4 years ago
I need help this question is kinda confusing
Mamont248 [21]

Answer:

Geometric Sequence.

Step-by-step explanation:

Geometric sequence. If you take a close look at the graph, it never touches the x - axis. If you use division in a geometric sequence, you will get a very small number, but you will never touch the axis.

4 0
4 years ago
A lawn and garden store surveyed 250 random customers who bought perennial flowers. Participants were asked the question, "Would
Inessa05 [86]

Answer:

The question is not biased

The sample is biased because it does not represent the population of customers at the lawn and garden store

Step-by-step explanation:

I just took the test :)

7 0
3 years ago
Break apart the number you are subtracting 53-16
krek1111 [17]
The answer is: 37

hope this helps
6 0
3 years ago
OPEN-UP... | GRADE
allochka39001 [22]

Answer:

The answer to your question is: 19 l

Step-by-step explanation:

Data

20 quarts to liters

Process

Rule of three

                         1 quart ------------------  0.946 l

                       20 quarts --------------     x

                           x = (20 x 0.946) / 1

                           x = 18.92 l ≈ 19 l

6 0
3 years ago
Read 2 more answers
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