Answer:
2461.76mm^2
Step-by-step explanation:
Pi times radius squared
3.14 times 28^2
Answer:
It would take them 6 minutes to paint the wall and 12 to paint the other half : 18 minutes
Step-by-step explanation:
Say that the student who can paint a wall in 12 minutes is painting half of the wall it would take them 6 minutes
As the other student who can paint the same wall in 24 minutes also paints half of a wall it would take that person 12 minutes.
Use substitution.
y = 2 - x and y = 4x + 7 can become
2 - x = 4x + 7
Now solve for x
-5 = 5x
-1 = x
Now plug -1 for x in either equation.
y = 2 - x -> y = 2 - (-1) -> y = 3
y = 4x + 7 -> y = 4*-1 + 7 -> y = -4 + 7 -> y = 3
So C) is the correct answer.
