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Tresset [83]
3 years ago
8

Maria is training to be a long distance runner. She runs once every day. On the average, each day that Maria has run, she has im

proved her time by 20 seconds. Today she ran for the fifth time. Her time was 10 minutes 48 seconds. What was Maria's running time the first day she ran?
Mathematics
1 answer:
Sav [38]3 years ago
7 0

Answer:

9 mins and 8 secs

Step-by-step explanation:

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If roni and allie work together to mow the field, what part of the field would roni mow?
marissa [1.9K]

Based on the Roni using a lawn mower and Allie pushing one, Roni would be able to mow 0.71 of the field.

<h3>How much of the field would Roni mow?</h3>

Assume that the part of the field that Roni would mow is x.

The relevant equation would be:

x/30 + x/75 = 1

5x/150 + 2x/150 = 1

7x / 150 = 1

x = 21.43

In 30 minutes, Roni would have mowed:

= 21.43 / 30

= 0.71

Full question is:

Roni and Allie are mowing the grass at the soccer field. Roni has a riding lawn mower and can mow the field in 30 minutes. Allie is pushing a lawn mower and can mow the field in 75 minutes.

Find out more on the rate of work at brainly.com/question/4976375.

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6 0
2 years ago
A triangle has side lengths of 5 inches, 8 inches, and 9 inches. What are possible side lengths of a similar triangle?
ella [17]
The answer is A: 30 in, 48 in, and 54 in.

Explanation:
If you multiply all of the sides by 6 you get answer. 5 * 6 = 30, 8 * 6 = 48, and
9 * 6 = 54.
3 0
3 years ago
How would I solve the equations: y = x-4 and y=x^2-4x using substitution
andriy [413]

Answer:

x = 6

Explanation:

y = x - 4

26 = 4x + y


If y = y, then we can rewrite this system as this: 4x + x - 4 = 26


Then we combine like terms and add 4  on both sides to give us  5  x  =  30 . Divide by 5 on both sides and we arrive at the solution: x = 6

6 0
3 years ago
PLEASE ANSWER ASAP!! WILL GIVE 50 POINTS! AND BRAINLIST!
levacccp [35]

\frac{3}{5}  -  \frac{1}{4}  =  \frac{7}{20}
then
\frac{7}{20}  \div  \frac{7}{10}  =  \frac{1}{2}
4 0
3 years ago
Pls help me with this 12 and below please ASAP SHOW WORK AND EXPLAIN
murzikaleks [220]
Lucy packs plates faster she packs 5 plates every minute. Mike packs 4 plates every minute because 3/4 of an hour is 45 minutes, then you divide 180 by 45 and the answer is 4 per minute. 
Franco would have to pack 90 plates every 20 minutes (1/3 of an hour) for his rate to be between Lucy's and Mike's. Lucy's rate is at 100 plates per 20 minutes because she can pack 5 plates every minute. Mike's it's at 80 plates per 20 minutes because he can pack 4 plates per minute. So that means that For Franco to be in the middle he has to pack 90 Plates every 20 minutes. 
Hope this helps!!!

4 0
3 years ago
Read 2 more answers
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