It takes Gabriella seven hours to harvest a field. Huong can harvest the same field in
nine hours. If they worked together how
long would it take them?
A) 4.93 hours B) 3.94 hours C) 3.39 hours
D) 5.07 hours

B

Step-by-step explanation:

Gabriella's one hour work=1/7

Huong's one hour work=1/9

one hour work of both=1/7+1/9=(9+7)/63=16/63 th

so they can harvest the same field in time=63/16=3.9375 hours≈3.94 hours.

B

the correct answer is x/3+10≥32

hope this !

you have 6 equal triangles, find the area of one of them (b*h/2) and multiply by 6

(8*4: 2)*6 =

32 cm² is your answer