With a tail wind, a helicopter traveled 300 miles in 1 hour 40 minutes. the return trip against the same wind took 20 minutes longer. find the wind speed and also the air speed for the helicopter.
!

do you mean add both of the equations together

because if you do the answer is 10x-5

step-by-step explanation:

36 girls

step-by-step explanation:

the 48 boys is 4 parts of the ratio

divide 48 by 4 to obtain one part of the ratio

= 12 ← 1 part of the ratio

3 parts = 3 × 12 = 36 ← number of girls

check above link.

graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.