On a cruise boat, there are two phone plans to choose from. Plan A charges a one-time fee of $25.00 to use the phone and $7.50 per minute. Plan B does not charge a one-time fee to use the phone, but charges $10 per minute. Write an equation and find total number of minutes you would have to talk to have equal costs for the plans.

Step-by-step explanation:

Plan A Cost = 7.5*x + 25

Plan B Cost = 10x

The left side of each equation must be equal

10x = 7.5x + 25       Subtract 7,5 x from both sides.

10x - 7.5x = 25       Combine

2.5x = 25                 Divide by 2.5

2.5x/2.5 = 25/2.5

x = 10

answer: .64

step-by-step explanation

set up the formula for standard deviation for this set of numbers, then simplify

all the angles opposite to the angle 150 would be 150 and all the angles that are next to 150 are 30 because they equal 180 it you add it up.

step-by-step explanation: