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CaHeK987 [17]
3 years ago
11

The current in a stream moves at a speed of 4 mph. A boat travels 5 miles upstream and 13 miles downstream in a total time of 2

hours. What is the speed of the boat in still water?
Mathematics
1 answer:
Dimas [21]3 years ago
7 0
I believe it is 4.5mph because traveling upstream and the stream moves at a speed of 4mph would knock off 4 of the original number so if you add 4miles to the given 5 miles you get 9

The same is with the boat going downstream it is adding 4 miles to the original number so you subtract 13 and 4 and you get 9

If it took 2 hours to do that then you divide 9 by 2 and get 4.5
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larisa [96]
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4 0
3 years ago
A recipe for cookies needs 240g of flour to make enough cookies for 5 people. How much flour would you need to make cookies for
Serga [27]

Answer:

720g

Step-by-step explanation:

5 people = 240g

×3 x3

15 people = 720g

5 0
3 years ago
3.) (4 x 9 - 21) \ 3+6^2
nignag [31]

Answer:

41

Step-by-step explanation:

Given Expression:

(4 x 9 - 21) \ 3+6^2

Multiply 4 and 9 to get 36.

36 - 21 / 3 + 6^2

Subtract 21 from 36 to get 15.

15/3 + 6^2

Divide 15 by 3 to get 5.

5+6^2

Calculate 6 to the power of 2 and get 36.

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Add 5 and 36 to get 41.

41

3 0
3 years ago
How many ink cartridges can you buy with 150 dollars if one cartridge costs 15 dollars ?
musickatia [10]

Answer:

10

Step-by-step explanation:

Very easy equation if you know how to do it. All you need to do is divide your total amount of something (in this case "150" as that's our amount of "money we're given") by whatever the price or amount is. (In this case 15. Each cartridge costs $15. I'm not amazing at explaining things like this.. Sorry about that. If you have any questions about this feel free to let me know!)

So to put it "all together":

150 ÷ 15 = 10.

10 is your answer.

Hope this helps and have a nice day!

8 0
3 years ago
Tomas makes a balloon sculptures at a circus. In 180 minutes, he uses 253 balloons to make 36 identical balloon sculptures.
Kipish [7]
180\ minutes\ \ \ \rightarrow\ \ \ 252\ balloons\\\\1\ minute\ \ \ \rightarrow\ \ \ x\ balloons\\\\x\cdot 180=1\cdot 252\ \ \ \Rightarrow\ \ \ x= \frac{252}{180}= \frac{36\cdot7}{36\cdot5}  = \frac{7}{5} =1.4\\\\Ans.\ \ 1.4\ balloons\ per\ one\ minute.\\\\-----------------\\\\ 1\ minute\ \ \ \rightarrow\ \ \ 1.4\ balloons\\\\10\ minutes\ \ \ \rightarrow\ \ \ x\ balloons\\\\x\cdot 1=10\cdot1.4\\\\x=14\\\\Ans.\ \ 14\ balloons\ per\ 10\ minutes.
7 0
3 years ago
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