Answer:
sorry for being late
1=40
2=50
3=50
4=130
5=90
Step-by-step explanation:
there's no exact answer for it because pi goes on forever
C
For first 3 minutes keep 1.25
Then for rest do 0.15(x-3)
Now add to get total cost
Mark brainliest please
Ax^2+bx=c
REMEMBER THIS
ok
first, make sure that a is 1
done
now take 1/2 of b and square it
-18/2=-9, (-9)^2=81
add that to both sides
x²-18x+81=19+81
x²-18x+81=99
factor perfect square
(x-9)²=100
square root both sides
don't forget positive and negative root
x-9=10
x-9=-10
ad 9 to both sides
x=19
x=-1
answer is -1; 19
2nd choice is answer
