What is the correct way of evaluating 30b+12b for b=5

Simplifying a higher root of a whole number

A taxi cab cost $1.50 for the first mile and $0.75 for each additional mile. Which equation could be solved to find how many miles you can travel in a taxi for $10, if x is the number of additional miles?

If you have 313.17 what would it be after tax if the tax is 7.65%

Ana drew a map of the Panama Canal. In the scale Ana used for the map, 4 centimeters represents 20 kilometers. The actual length of the Panama Canal is 82 kilometers. What is the length in centimeters of the Panama Canal on Ana's map?

Emily is saving money for her vacation. She stared with $23.00 and earns $8.00 each day. How much money will she have on day 10

4 (x+1) - 7 = 3 (x-1) + x

Ben is sailing on a ship. The ship goes 600 miles north and then turn west. It travels 200 miles west and turns sought for 450 miles. It turns west again and travels 170 miles and turns south once more and travels 150 miles.

The volume of a tissue box is 288in3. If the box has a width of 6 inches and it is 4 inches high, how long is the box?

2.5 (x-7) + 0.5=12.5. "I bought a cookbook for $7. If I had $2.5 more, I could have bought another book for $12.50".

If you took a true " if then " statement inserted a not in each clause, and reversed the clauses, the new statement would also be true