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

answer: 0,6

step-by-step explanation:

this would make it the y intercept.

option c) graph of line going through 1, 4 and 3, 10

step-by-step explanation:

let y equal to margo's coin collection

let x equal to number of years

at the begining x=0, y=1 → point=(x,y)→point=(0,1)

she adds 3 coins per year, then y=1+3x

at x=1, y=1+3(1)=1+3→y=4→point=(x,y)→point=(1,4)

at x=3, y=1+3(3)=1+9→y=10→point=(x,y)→point=(3,10)

the graph of line going through (1, 4) and (3, 10), then the option c is the correct.