Answer:
the 3rd one
Step-by-step explanation:
mark me brainliest if it was helpful
How much part can sally paint in an hour ?
a ÷ 7 = a/7
And what about Steve ?
a ÷ 9 = a/9
Where, a is the total area of the room.
So, let the time taken by both of them to paint the room together be 't'
So,
t(a/7 + a/9) = a
t(9a/63 + 7a/63) = a
t(16a/63) = a
t = 63/16 ≈ 4 hr
Answer: -1885/1
Explanation: The solution to -2310 added to 425 is -1885. And in order to make this whole number a fraction, you must add a 1 as the denominator.
It will take you 3/4 of an hour, or 45 minutes to paint 1 wall.
Answer:
x = 50
Step-by-step explanation:
55 degrees + (2x + 25) degrees = 180 degrees
55 + 25 + 2x = 180
80 + 2x = 180
2x = 100
x = 50
