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Flura [38]
3 years ago
10

There are students in three rows taking a test. there are 22 students in the first row, 19 students in the second row, and a cer

tain number of students in the third row. if there are a total of 62 students, how many students are in the third row?
Mathematics
1 answer:
MAXImum [283]3 years ago
5 0
22+19+x = 62
combine like terms

41+x = 62
subtract 41 from both sides

x= 21
there are 21 students in the third row
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Bob and mark talk about their families. Bob says he has 3 kids, the product of their ages is 72. He gives another clue: the sum
pychu [463]
I can only give possible combination of the ages. Had the sum of the ages been given, then the 3 specific numbers would have been derived.

We need to do prime factorization of 72.

72 ÷ 2 = 36
36 ÷ 2= 18
18 ÷ 2 =  9
  9 ÷ 3 =  3
  3 ÷ 1 = 1

1 x 2 x 2 x 2 x 3 x 3 = 72

Possible combinations:

1 x 8 x 9 = 72           1 + 8 + 9 = 18
1 x 4 x 18 = 72         1 + 4 + 18 = 23
2 x 4 x 9 = 72            2 + 4 + 9 = 15
3 x 4 x 6 = 72            3 + 4 + 6 = 13


3 0
3 years ago
Does it matter if you group like terms?
Mashcka [7]

Answer: Yes it does matter because you can't add the like terms if they aren't the same.

Step-by-step explanation: 2x+8y you can't add these two because they don't have the same like terms.

4 0
3 years ago
In a science experiment, the temperature of a substance is changed from 42 degrees Fahrenheit to -54 at an average rate of-12 de
Westkost [7]

Answer:

  8 hours

Step-by-step explanation:

The time required is the temperature difference divided by the rate of change of temperature:

  (-54 -42)°F/(-12 °F/h) = -96/-12 h = 8 h

4 0
3 years ago
Find the commission earned on total sales of $164,000 at a commission rate of 3%.
ArbitrLikvidat [17]

Answer:

$4,920

Step-by-step explanation:

164,000 x .03 = 4920

8 0
4 years ago
15 r minus 6 r = 36. What is the value of r?
vodomira [7]

Answer:

r=4

Step-by-step explanation:

15r-6r=36

9r=36

r=36/9

r=4

3 0
3 years ago
Read 2 more answers
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