The monthly cost C, in dollars, for calls from the United States to Japan on a certain phone plan is modeled by the function

C(x) = 0.07 + 24.99

Where x is the number of minutes used and C is in dollars

a) What is the cost if you talk on the phone for 45 minutes?

b) Suppose that your monthly bill is $40, how many minutes did you use on the phone?

c) Suppose that your monthly budget only allows $50 on the phone. What is the

maximum number of minutes that you can talk?

d) Suppose D(x) models another phone plan that charges

D(x) = 0.14 + 10.99

Where x is the number of minutes used and C is in dollars

If you typically can only spend $50 a month for the phone, which plan C(x) or D(x)

would provide more minutes per month?

Beatrice decides she wants to babysit a few children at the same time to earn the money faster. she tells parents that if they allow her to babysit their children at her house, she will eliminate her automatic $5 tip and will give them an additional $5 discount. (a) write an equation showing the total cost for each client. identify all variables. (b) four parents bring their children to beatrice’s house at the same time for babysitting. beatrice wants to find out how many hours she must babysit the 4 children to earn exactly the $100 she needs in order to buy the present for her mother. write and solve an equation to find the number of hours. justify each step in the solution. (c) one parent decides not to drop off her child. the remaining 3 parents drop their children off at 9 a.m. two of the parents say they will be back at 1 p.m. the third parent says she will pick up her child at 2 p.m. at noon, beatrice realizes she needs feeding the 3 ch

Aconvex octagon has interior angles that measures 73 degrees, 172 degrees, 132 degrees, 59 degrees, 154 degrees, 163 degrees, x degrees, 2x degrees find the value of the missing angles

Solve 3x-18=2y and 5x-6y=14 by elimination or substitution . show all !