Factor 4x^2-4-x^2y^2+y^2

If a student guesses the answers to four true-false questions, what is the probability that he will guess all four correctly?

1. Correlation analysis is used to determine a. the equation of the regression line b. a specific value of the dependent variable for a given value of the independent variable c.

Write the expanded form of this number: 46.324 A 40 + 6 + 0.3 + 0.2 + 0.4 B 40 + 6 + 0.3 + 0.02 + 0.004 C 40 + 6 decimal 3 + 2 + 4 D 40 + 6 + 0.003 + 0.02 + 0.4

Solve and graph the inequality. - 5/8x > 25

Study results indicate that the mean length of time people spend on a bus in a city is between 21.2 min and 24.5 min What is the study margin of the error?

Which class has 28% 28% boys? Clear Check Class A: 3 3 out of 30 30 Class B: 28 28 out of 40 40 Class C: 1 1 out of 28 28 Class D: 14 14 out of 50 50

Alex and bob are playing 5 chess games. Alex is 3 times more likely to win than bob. What is the probability that both of them will win at least 2 games?

26/310 in simplest form

Given: diameter of Circle P. 1 = m 3 = 20°, then m =

Bill's new porch is rectangular, with an area of 50 square feet. if the length of the porch is two times the width, what is the perimeter of the porch?