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LekaFEV [45]
3 years ago
10

Do the ratios 21 24 and 2 4 form a proportion?

Mathematics
1 answer:
aivan3 [116]3 years ago
6 0

Step-by-step explanation:

no. if you simplify 21:24 down you would not get 2:4

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In a large marathon, runners start the race in stages. Leanna started in group E and ran at a rate of 4.8 miles per hour. During
grandymaker [24]

Answer: Leanna ran 39.96 miles before she was passed by Irina.

Step-by-step explanation:

When Irina would pass Leanna, they would have ran the same distance.

Let t represent the time that Leanna ran before she was passed by Irina.

Distance = speed × time

Leanna started in group E and ran at a rate of 4.8 miles per hour. The distance ran by Leanna before she was passed by Irina is

4.8 × t = 4.8t

During the race she was passed by Irina who ran at a rate of 5 miles per hour and started in group H, 20 minutes(20/60 = 0.333 hour) after Leanna started. The time spent by Irina in running this distance is

t - 0.333

Distance ran by Irina is

5(t - 0.333) = 5t - 1.665

Since they ran the same distance, then

4.8t = 5t - 1.665

5t - 4.8t = 1.665

0.2t = 1.665

t = 1.665/0.2 = 8.325 hours

Therefore, the distance that Leanna ran before she was passed by Irina is

4.8 × 8.325 = 39.96 miles

6 0
3 years ago
Which relation represents f(x) = 2x - 5?
goblinko [34]

Answer:

{(0,-5), (1, -3), (2, -1), (3, 1)

Step-by-step explanation:

If you plug in 1 for x you get f(x)=2(1)-5 which equals 2-5=-3

You would repeat these steps just going up by one number every time

7 0
3 years ago
Why is it not possible to make a right triangle using lengths of 20 feet, 40 feet, and 65 feet?
kogti [31]
20+40=60 and therefor 60 is less than 65
8 0
2 years ago
Read 2 more answers
Which relationship describes angles 1 and 2?
In-s [12.5K]

Answer:

Supplementary Angles

Adjacent Angles

Step-by-step explanation:

Angles 1 and 2 share a vertex and form a straight line. These angles are called supplementary angles. They add to 180 degrees and form a straight line. They are adjacent as well because they share a vertex and side.

3 0
2 years ago
Which polynomial is equivalent to 8x3+12x/2x when x≠0?
ANTONII [103]

Answer: look at the picture

Step-by-step explanation: Hope this help :D

6 0
2 years ago
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