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Ad libitum [116K]
3 years ago
7

On average, Debbie can finish 4 algebra problem in 30 minutes. If Debbie works at this rate, how many problems will she solve in

2.5 hours? Justify your answer.
Mathematics
2 answers:
alexandr402 [8]3 years ago
5 0
She will solve 20 problems in 2.5 hours, 4*5 thirty minute sessions=20.
sertanlavr [38]3 years ago
4 0
If 4 = 30, that means 8 = 60 (which is one hour)

that means if 8 = 60, 16 = 120, 

If 120 is 2 hours, we need to add another 30 minutes. 
30 minutes is 4 algebra questions so our answer would be 20 = 150 minutes
150 minutes = 2.5 hours.
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Time = distance/speed
Since you want to find the time Holly spent riding, you need to divide her distance (24 miles) by her speed (6 miles/hour) to get the number of hours (4) that she rode. Her starting time added to the time spend riding will give her ending time. One must subtract the riding time from the ending time to find the starting time.

Selection A is appropriate.
8 0
3 years ago
In a chess tournament, each player plays every other player exactly once. If it is known that 105 games were played, how many pl
diamong [38]

Answer:

15 players played in the chess tournament.

Step-by-step explanation:

When there are 15 players, the first player plays 14 games and step aside.

remaining 14 player

next player plays 13 games. steps aside

remaining 13 players

next player plays 12 games. steps aside

remaining 12 players

next player plays 11 games. steps aside

remaining 11 players

.

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Last player plays 1 game and steps aside

remaining 1 player who will not play against himself.

∴ Sum of all games played

= 14 + 13 + 12 + 11 + 10 + 9 + 8 + 7 + 6 + 5 + 4 + 3 + 2 + 1 = 105 games played

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3 years ago
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3 years ago
In the fraction 15⁄7, which of the following is 15? Numerator Divisor Denominator Factor
Colt1911 [192]

Answer is Numerator.

In a fraction, the denominator is on the bottom and the numerator is on top. A factor is a number, when multiplied with another number, that equals the final product. For example: 1, 2, 3, 6, 9, 18 are all factors of 18. A divisor is something you are dividing by in a division problem.

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2 years ago
What is answer I need to know
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