Answer:
Step-by-step explanation:
Increased amount = 3 - 2.50 = $ 0.50
Increase percentage = 
= 5 *4
= 20%
Answer:
B
Step-by-step explanation:
P(7,r) = 5040

(7 - r)! = 1!
7 -r = 1
7 = 1 + r
7 - 1 = r
r = 6
Eight hours a day is a healthy average
Answer:
Factor the numerator and denominator and cancel the common factors.
-2x/-10 = x/5
Step-by-step explanation: