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Zepler [3.9K]
3 years ago
8

15-3a =?? please help

Mathematics
1 answer:
scoundrel [369]3 years ago
3 0

Answer:

a=5

Step-by-step explanation:

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A motorboat takes 40 minutes to travel 20 miles downstream. The return trip takes 60 minutes. What is the speed of the current?
FromTheMoon [43]
Let b be the speed of the boat, and c be the speed of the current. Then:
20/b+c=2/3 hr
20/b-c=1 hr
2/3b+2/3c=20
b-c=20
Then:
b+c=30
b-c=20
2b=50
b=25 mph
c=5 mph
☺☺☺☺
5 0
3 years ago
If a right triangle has a hypotenuse of length 20 units and one leg of length 16 units, find the length of the other leg. A. 12
xxTIMURxx [149]

Answer:

12

Step-by-step explanation:

Use the Pythagorean theorem which is a^2 + b^2 = c^2

c is hypotenuse and a and b are the legs

we need to find a^2 so

a^2 + 16^2 = 20^2

a^22 + 256 = 400

then subtract 256 from 400

a^2 = 144

square root 144

= 12

5 0
3 years ago
Read 2 more answers
Plz help! Will give brainlest
AnnZ [28]

Answer:

99 Sorry if im wrong

Step-by-step explanation:

8 0
3 years ago
Explain the difference between the graphs<br> Please help quick
antoniya [11.8K]

Answer:

Graphs represent the mathematical connections or interrelationships between the different set of the data whereas the charts represent the diagrams where one can find the depicted information or the data. As mentioned earlier all type of graphs are charts, but on the flip side, not all charts are graphs.

Step-by-step explanation:

I got this from the site called graphs vs charts i hope that is helps

8 0
4 years ago
Describe and correct the error in determining which type of function the table represents.
topjm [15]

Answer:

<em>"Consecutive y-values change by multiplying previous value by a constant amount. So, the table represents an exponential function."</em>

Step-by-step explanation:

In reality, the table represents an exponential function instead of a linear function, since values on domain change arithmetically at constant rate, whereas values on range change geometrically at constant rate.

Correct phrase may be:<em> "Consecutive y-values change by multiplying previous value by a constant amount. So, the table represents an exponential function."</em>

5 0
3 years ago
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