The equation of a line is −2x+5y=-20
what is the x-intercept of the line?

If you flip a coin 3 times, what is the probability of flipping heads 3 times? a. p(3 heads) = 3/8 b. p(3 heads) = 1/6 c. p(3 heads) = 1/8 d. p(3 heads) = 1/2

Summary statistics given for independent simple random samples from two populations. use the pooled t-interval procedure to obtain specified confidence interval. x1=71.6, s1=3.9, n1=11, x2=67.9, s2=3.4, n2=9 determine a 99% confidence level.

Consider the quadratic equation ax^2 +bx+5=0 , where a,b, and c are rational numbers and the quadratic has two distinct zeros.if one zero is irrational , the other zero is