Can someone answer five math questions for me.

If only one number in a fraction is negative, does that mean the whole fraction is negative

Which ordered pairs are solutions to the inequality - 2x+y≥-4? A. (1, -2) B. (3, -1) C. (0, - 5) D. (0, 1) E. (-1, 1)

A gear ratio is the ratio of the teeth on the front sprocket and the teeth on the rear sprocket. If a bike has 36 teeth on the front sprocket and 12 teeth on the rear sprocket, what is the gear ratio for the bike?

A new car worth $18 comma 000 is depreciating in value by $3 comma 000 per year. after how many years will the car's value be $3 comma 000 ?

Convert 1 to a percent then determine that percent of 9.876

How to find number of sides from sum of interior angles?

What is 950,000,000 in scientific notation?

6,8,10,12 arithmetic or geometric

There is a number, which has five digits 5abc9. If this number is the square of an integer, where a, b, c each represent a missing digit and all five digits are different, then find this number.

Andy's backpack weighs 2 1⁄4 pounds. If he removes a book that weighs 13 ounces, how much does the backpack now weigh?