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

from the figure we get,

the x axis shows   the months and,

the y-axis shows the number of satisfied customer.

each line or each cell in upward direction (y-axis) shows 500.

the appropriate scale for the y - axis is: -

a = 2000 customers

b = 4000 customers

c = 6000 customers

d = 8000 customers

e = 10000 customers

f = 12000 customers

g = 14000 customers

a.

step-by-step explanation:

step 1 distribute 2 to every term in the parentheses

step 2 add 10 on both sides of the equal sign