Answer:
15 boys
Step-by-step explanation:
50 x .30 = 15
Answer:
First you need to identify what the known ratio and and the unknown one
Then you need to setup the proportion.
After that cross multiply and then solve
Lastly check your answer by plugging the result into the unknown ratio and you should get your answer.
The answer would be the last one because function one has a slope of 1/2 (use rise/run) and function 2 has a slope of 2 (subtract the 2nd y value by the one above it)
A can do 1 job in 10 min. means 1/10 job per min.
B can do 1/15 job per min.
together A&B can do 1/10+1/15 =1/6 job per min.
1/6 job they spend 1 min
1 spend 1x1/(1/6) = 6 min