20 pts and a ! flying against the jetstream, a jet travels 5600 miles in 8 hours. flying with the jetstream, the same jet travels 4000 miles in 4 hours. what is the rate of the jet in still air and what is the rate of the jetstream?

The rate of jet in still air is 850 mile per hour  

The rate of jetstream is 150  mile per hour.

Step-by-step explanation:

Given as :

The distance cover against jetstream  = 5600 miles

The time taken against Jetstream = 8 hours

The distance cover with jetstream = 4000 miles

The time taken with the jetstream = 4 hours

Now , let The speed of jet in still air = x  mph

The speed of jetstream = y  mph

As , Speed =

So, According to question

    x - y =

Or, x - y = 700   mph

    x + y =

Or,  x + y = 1000 mph

So,  ( x -  y ) + ( x + y ) = 700 + 1000

Or,   2 x = 1700

∴         x = = 850 mph

And    y = 1000 - 850 = 150   mph

Hence The rate of jet in still air is 850 mile per hour  and The rate of jetstream is 150  mile per hour.   Answer

answer: c, the green line

step-by-step explanation:

there is no black line, eliminate b.

simple interest implies periodic payments, but the red line shows no payments, eliminate d.

simple interest has equal payments. if paid say every day, the graph is about a straight line (actually a stairstep).

the yellow line is not straight, eliminate a.

check: the green line is straight, answer is c.

simple interest with positive interest rate gives a straight line sloping up to the right. green line:

g(t) = $100 + ($200-$100) ÷ (20 years) × (t years)

= $100 + (4%/year) × ($100)(t years)

incidentally, the yellow line curving upward represents continuously compounded interest

y = $100 × 2^(t years / (14 assuming the yellow line hits $200 at 14 years. 2^0 is 1, so y(0) = $100; 2^(14/14) is 2, so y(14) = $200.

answer: c

(2, -4)

goes 7 to the

(9, 4)

easy