Show an equation using halving and doubling

Cathy pays $25 a month plus $0.05 per text message. She models this with the function C = 0.05x + 25. If the text messaging fee increases to $0.10, what is her new function?

If the length of a rectangle is 6m longer than its width, what is the area if the perimeter is 44m

What is 3x + (2 - 4x) in simplest form?

Junior has saved money in his piggybank over the winter. He wants to buy a $30 computer game. If he has 14 one-dollar bills, 16 half dollars, 12 quarters, 8 dimes, 25 nickels, and 10 pennies, how much more does he need to borrow from Dad to buy the

Tony spent $100 on books to give away as prizes to his students. At the store, he bought 4 more books than planned, spending $5 per book Which equation can be used to find the number of books he originally wanted to buy, 12

Evaluate f³+11g-4h when f=3, g=2, h=11

An=-31 + (n-1) - 11 find the eleventh term

Brian works in the lab and feels an empty cylindrical flask with 200 cubic centimeters of liquid. The flask has a radius of 3 cm and a height of 12 cm. What percent of the volume of the flask is not filled with liquid?

436% of what number is 31.61

If you have zero cookies and share them amongst zero friends, how would you write the equation and solve it?