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Mnenie [13.5K]
3 years ago
7

S a punishment for something naughty that we did, my little brother and I have to whitewash both sides of a fence. We start at t

he same time, and we each work at a constant rate.
If we each whitewash one side, I'll finish in 2 hours and my brother will finish in 3 hours. But I'm a nice kid, so after I finish my side, I go around to the other side and help my brother finish his side. From the time I start helping him, how many minutes does it take us to finish the job?

Hint(s):

How many sides per hour can I paint? How about my brother? How about both of us together?
Mathematics
1 answer:
Step2247 [10]3 years ago
8 0
Two and a half hours.
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The metro theater has 20 rows of seats with 18 seats in each row. Tickets cost $5. The theaters income in dollars if all seats a
jarptica [38.1K]
<span>In a Metro there are:
20 rows of seats
18 seats in a row
and $5 per ticket

Using commutative property of Multiplication:
Therefore.
=> (20 x 18) x 5 = 5 x (18 x 20)
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8 0
3 years ago
A gym instructor has a total of 60 hand weight in her studio. Some of the hand weights are 3 pound weights and the rest are 5 po
Elden [556K]

Answer:

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  • 25 3-lb weights

Step-by-step explanation:

Let t and f represent the numbers of three- and five-pound weights. The problem statement tells us ...

  f + t = 60

  f - t = 10

Adding these two equations, we get ...

  (f +t) +(f -t) = (60) +(10)

  2f = 70 . . . . . eliminate parentheses

  f = 35 . . . . . . divide by 2

She has 35 5-lb weights, and 25 3-lb weights.

8 0
3 years ago
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anzhelika [568]
I think it would be 17.5
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In what ways does adding a constant or coefficient to a quadratic equation affect the graph?
erastova [34]
<span>If you are adding a constant, then the graph is either raised or lowered k units.

For example.... If you have the graph of y = x^2 and now you add 3, so your new graph of x^2 + 3, will be the same graph as x^2 but raised vertically 3 units.
 
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3 years ago
What is the volume of a cylinder, in cubic centimeters, with a height of 11 centimeters
kondor19780726 [428]

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