Answer:
x = 42
Step-by-step explanation:
y = x/7 + 15 ; y = 21
21 = x/7 + 15
21 - 15 = x/7
6 = x/7
x = 6 × 7
x = 42
Thus, The answer is 42
<u>-TheUnknownScientist</u>
Answer:
try this answer x2 + 2xy + y2 - 16
So if 2 people take 9 hours to paint the room and you want to know how long it will take if 3 people were painting first you will have to find the slope, or the rate of change, to do this you have to divide 9/2.
9/2= 4.5
So it take 4.5 hours for one person to paint the room.
Therefore if there where three people painting it would be 3 x 4.5= 13 hours and 30 minutes.
The time it would take to paint the room would increase.
Answer:
Step-by-step explanation:
if 5.2 pounds cost 5.29 , 1 pound will be less=5.2/5.29
then multiply it by 2 =1.96
Answer:
y = 2x - 1
Step-by-step explanation:
y2 - y1 / x2 - x1
-5 - (-3) / -2 - (-1)
-2/-1
= 2
y = 2x + b
-3 = 2(-1) + b
-3 = -2 + b
-1 = b
