2 years ago

Question 9 of 10

Mathematics

1 answer:

allochka39001 [22]2 years ago

7 0

Answer:

I think it's 126cm not sure

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A motorboat takes 5 hours to travel 100 kilometers going upstream. The return trip takes

tatuchka [14]

Step-by-step explanation:

Let's say b is the rate of the boat in still water, and c is the rate of the current.

Distance = rate × time

Going upstream:

100 = (b − c) (5)

20 = b − c

Going downstream:

100 = (b + c) (2)

50 = b + c

Solve the system of equations using substitution or elimination. Using elimination, add the equations together:

70 = 2b

b = 35

c = 15

The boat's speed is 35 km/h, and the current's speed is 15 km/h.

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3 years ago

81=n-3 (-5+4n<br> Equals what

lyudmila [28]

If 81=n-3(-5+4n)
81= n+15-12n
81= -11n+15
-11n=81-15
-11n=66
n=-6

4 0

3 years ago

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Distribute and simplify these radicals. 23-(V+ 3) O 2V5 + 6 02/15 O 30 O 6/2+6

zhannawk [14.2K]

Answer:

Step-by-step explanation:

6 0

3 years ago

Identify the variable expression that is not a polynomial.

Blababa [14]

I think the answer is A.33 not a polunomial

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3 years ago

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The sales tax in your state is 5% if a car costs $24,600 what is the total cost including tax?

Svetach [21]

<h2>Greetings!</h2>

Answer:

$25830

Step-by-step explanation:

If 100% of the car price is 24,600 , then you can imagine that extra 5% being added to this

100 + 5 = 105

So you need to find what 105% of the cost was.

To do this you can use the percentage formula:

Amount x $\frac{percentage}{100}$

Now, you can simply plug the values into this

24,600 x $\frac{105}{100}$

24600 x 1.05 = 25830

<h3>So the total cost including tax would be $25830!</h3><h3 /><h2>Hope this helps!</h2>

7 0

3 years ago