All categories

2 years ago

Please help me out!

Mathematics

1 answer:

gavmur [86]2 years ago

5 0

Answer:

B is correct because it value become 15^9

Step-by-step explanation:

You might be interested in

John has a boat that will travel at the rate of 15 kph in still water. He can go upstream for 35 km in the same time it takes to

Otrada [13]

Answer:

The boat traveling at 24 kph when John goes downstream.

Step-by-step explanation:

We are given the following in the question:

John has a boat that will travel at the rate of 15 kph in still water.

Let x be the speed of the current.

Speed of boat in upstream

$(15-x)\text{ kph}$

Speed of water in downstream

$(15+x)\text{ kph}$

Relation:

$\text{Speed} = \dfrac{\text{Distance}}{\text{Time}}$

We have to find the speed of boat in downstream.

Time to travel upstream for 35 km = Time to travel 140 km downstream

$\displaystyle\frac{35}{15-x}=\frac{140}{15+x}\\\\35(15+x) = 140(15-x)\\525 + 35x = 2100 - 140x\\175x = 1575\\x = 9$

Thus, speed of current is 9 kph.

Speed of boat in downstream = 15 + 9 = 24 kph.

Thus, the boat traveling at 24 kph when John goes downstream.

4 0

3 years ago

Evalue 3a -4b for a =a and b=6

katrin2010 [14]

Answer:

3a-4b

3a-4(6)

3a-24

Step-by-step explanation:

8 0

3 years ago

in a right triangle,one leg measures 4 inches and the other leg measures 6inches. what is the length of the hypotenuse in inches

Sergio039 [100]

A^2 + b^2 = c^2 a=4 b= 6
4^2 + 6^2 =52
square root that:
c=2 square root 13 exactly or 7.2 approximately <span />

7 0

3 years ago

If xy is rational, must x and y each be rational?

balu736 [363]

<span>Your answer is is simply,no x and y could have a common irrational factor. </span>

3 0

3 years ago

In 12 years, Janice will be 8 times as old as she was 2 years ago. How old is Janice<br> now?

Setler [38]

Janice is currently 4.

In 12 years, Janice will be 16, and 2 years ago she was 2. That being said, 16 is eight times more than 2, thus meaning she is currently 4 years old.

I hope this helps!

6 0

3 years ago

Please help me out!​

Please help me out!