How to round numbers in math

Gasoline cost $3.28 per gallon. It took 16.5 gallons to fill Steve's gas tank. How much did the gasoline cost?

What do I add to negative 17 to equal negative 13

2 (b+c) (use the distributive property)

Write an expression let x represent the number if tickets sold, and y represent the total amount of money raised

Find the solution set of 3x + 2y = 12 if each variable represents a positive integer.

Raul wants to buy a new collar for each of his 3 cats. The collars come in a choice of 4 different colors. Step 2 of 2 : How many selections of collars are possible if repetitions of colors are not allowed

Need to find the side lengths for a triangle with sides a=2a, b = 3a, c = 17. need to solve for variable a and not sure how.

Which inequality has no solution? 6 (x+2) > x-3 3+4x<2 (1+2x) -2 (x+6) < x-20 x-9 < 3 (x-3)

Every cupcake Jake bakes weighs 0.45 pounds how much will a box of 100 Cupcakes weigh

The surface area of the given cube is 150 square feet. a) 5 cubic feet b) 25 cubic feet c) 125 cubic feet d) 625 cubic feet