Mary's backpack: 25% of 65 = 0.25 * 65 = 16.25; 65 - 16.25 = $48.75
Roberto's backpack: 30% of 75 = 0.3 * 75 = 22.5; 75 - 22.5 = $52.5
Mary's backpack was a better buy because it was cheaper.
Answer: 615.44 cm²
Step-by-step explanation: When solving this problem the formula that you need to know is that area = π r².
The 14 cm that they are giving you is the radius of the circle, and π equals 3.14. So, in order to solve this the formula is:
Area = 3.14 x 14²
Area = 3.14 x 196
Area = 615.44 cm²
Answer:
x = 
Step-by-step explanation:
Using the rule of logarithms
log x - log y = log (
)
x = n ⇒ x = 
Given
(9x) - 3 = 3
(
) = 3
3x = 3
3x = 2³ = 8 ( divide both sides by 3 )
x =
Answer:
x<-3 or x>2, 2<x<-3
Step-by-step explanation:
Subtract/add from each side then divide, if dividing by a negative reverse the sign.
