In still water, the speed of the boat 10 mi/h. camilla drives the boat upstream for 60 min. and then downstream to her starting point in 20 min. what is the speed of the stream?

5 mi/h

Step-by-step explanation:

S = v*t

S - space (miles)

v - velocity (mi/h)

t - time (h)

stream speed = x

The distance upstream(S_1) is expressed by :

60 min -> 1 hour

S_1 = (10-x)*1

The distance downstream is expressed by :

20 min -> 0.3(3) hour

S_2 = (10+x)*0.3(3)

The distance traveled upstream for 60 min is equal to the distance traveled downstream in 20 min. -> S_1 = S_2

(10-x) * 1 = (10+x)*0.3(3)

10 - x = 3.3(3) + 0.3(3)x

6.6(6) = 1.3(3)x

x = 6.6(6) / 1.3(3)

x = 5 mi/h

30 units^2

step-by-step explanation:

area is l × w

the length is 3

and the width is 10

3 × 10= 30 units squared

(f - g)(x) = 5x^3 - 3

step-by-step explanation:

rearrange these functions vertically, with like terms in separate columns:

f(x) = 5x^3 - 2

g(x) =         +1

now subtract, column by column:

(f - g)(x) = 5x^3 - 3