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grandymaker [24]
3 years ago
5

20 points !! and all make brainliest!!!

Mathematics
1 answer:
Masteriza [31]3 years ago
7 0
80 degrees because I did it myself
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a boat is going 144 miles upstream on a river. the speed of the boat in still water is 60 miles per hour. the speed of the river
Katena32 [7]

Answer:

Let  b  =  rate of the boat.

Let  r  =  rate of the river.

The rate going downstream is  b + r.

The rate going upstream is  b - r.

rate x time  =  distance

4(b + r)  =  144     --->     b + r  =  36     [divide both sides by 4]

9(b - r)  =  144      --->     b - r  =  16      [divide both sides by 9]

Add town:                          2b  =  52  

Divide by :                           b  =  26  mi/hr

                                           r  =  10  mi/hr

Step-by-step explanation:

5 0
2 years ago
HELP WITH THIS ASAP!
Mars2501 [29]

Answer:

Hi, there your answer will C. 85pi ft^2

Step-by-step explanation:

pi(5)(12)+pi(5)^2

60pi+25pi

85pi ft^2

Hope this helps :)

8 0
3 years ago
Will is w years old <br> Ben is 3 years older <br> Write an expression, in terms of w, for bens age
Westkost [7]
Ben is w+3 years old.
7 0
3 years ago
Find the sum of the first one hundred positive integers. see fig 6.26
nignag [31]
Here's a pattern to consider:
1+100=101
2+99=101
3+98=101
4+97=101
5+96=101
.....
This question relates to the discovery of Gauss, a mathematician. He found out that if you split 100 from 1-50 and 51-100, you could add them from each end to get a sum of 101. As there are 50 sets of addition, then the total is 50×101=5050
So, the sum of the first 100 positive integers is 5050.

Quick note
We can use a formula to find out the sum of an arithmetic series:
s =  \frac{n(n + 1)}{2}
Where s is the sum of the series and n is the number of terms in the series. It works for the above problem.
8 0
3 years ago
Any idea what the answer could be??????
sveta [45]

Here is the answer with an explanation!

3 0
3 years ago
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