Explain why 235 is not divisible by 7

Margaret got a 7/23 balloon mortgage and her initial payments were $915. She decided to refinance her balloon payment with a 30-year mortgage and her new payments were $895. What is the total financed cost she paid for hen house?

Square root of 9 over 225

5.23 times 10possitive 4

A cone has a radius of 40cm and a volume of 1.875cm what is the volume of a similar cone with a radius of 16cm

2x - 3y - z = - 17 6x + 5y + z = - 3 2x + 2y + 2z = 8

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.