Solve each equation

1/2 (b-8) = 4

Sumeet uses 0.4 gallons of gasoline each or mowing lawns how much gas does he use in 4.2 hours

Find and state the slope of a line that has given the equation: 2x+5y=10

Find the circumference

In a geometric sequence in which all of the terms are positive, the second term is 3 and the fourth term is 192, what is the value of the 7th term in the sequence?

Find the exact circumferece of a circle with a given radius of 3 1/4 inches. A) 6.25 pi inches B) 6.5 pi inches C) 23.25 pi inches

A certain disease has an incidence rate of 0.2%. If the false negative rate is 8% and the false positive rate is 4%, compute the probability that a person who tests positive actually has the disease.

How many 4-element subsets containing the letter a can be formed from the set {a, b, c, d, e, f, g}?

A safety inspector conducts air quality tests on a randomly selected group of 7 classrooms at an elementary school. Identify the population and sample in this setting.

A square has an area of 15in^2. what is the approximate side lengths of the card

In class, we used associative property to show that when 6 is a factor, then 2 and 3 are factors, because 6=2x3. Use the fact that 10=5x2 to show that 2 and 5 are factors of 70, 80, and 90.