Will it increse or decrese:

Katlyn made 4 dresses with 7 yards of fabric. how many yards did she use on 1 dress?

What is the standard form of -5x^2+2x^4-11+x^3+3x

Reduce fractions expressing probability to lowest terms. in 3,000 repetitions of an experiment, a random event occurred in 500 cases. the expected probability of this event is?