Can someone explain negative exponents?

The slope-intercept equation of a line is y=-5x+3. What are the slope and y-intercept of the line A) the slope is 3 and the y intercept is (0,5) B) the slope if - 5 and the y-intercept is (0,3) C) the slope is - 5 and the y intercept is (0,-3) D)

Debra purchased a prepaid phone card for $25. Long distance calls cost 19 cents a minute using this card. Debra used her card only once to make a long distance call. If the remaining credit on her card is $21.58, how many minutes did her call last?

List the following numbers from least to greatest 0.8,5/8,70%,0.09

Factor the term completely: 1 - (x+y) ^3

The value of a bike depreciates by 20% each year why after 2 years is it not reduced by 40%?

Ricardos recipe for 4 loves of bread requires two thirds cup of olive oil. He only wants to make one loaf. Ricardo makes a model to find out how much oil he needs to use. He folds a piece of paper into 3 parts and shades 2parts.

Factor completely 3x ^2 - 27

A food worker needs to cool a large pot of soup. How should the food worker cool the soup?

What is I=$562.59, p=$1500, t=yrs

Simplify 23 + 6c + 8d - 7d - 6