B.
For all 3 to work together, they can paint 1 room per hour.
C.
John can paint a room at 1/4 of a room per hour.
Rick can paint a room at 1/5 of a room per hour.
Together they can paint a room at a rate of 9/20 of rooms per hour.
D.
1 = 1/4j + 1/5r + 11/20m (john, rick, molli)
E.
The least common denominator is 20
F.
1 = 1/4(0) + 1/5(0) + 11/20x
1 = 0 + 0 + 11/20x
1 = 11/20x
x = 1/(11/20)
x = 1 9/11
It will take Molli 1 hour and 49 minutes (60 x 9/11) to paint the room alone.
Answer:
Step-by-step explanation:
3/4 x 9/4 = 1.6875 or 27/16
Answer:
R72. 80
Step-by-step explanation:
1KG = R36, 40
2KG = R36.40 X 2
= R72. 80
Draw a graph the function and find the value of x that produces the maximum
No 5/8=62.5% and that means 5/8 is greater that 60%
