In math class there are 15 ninth grade books and 10 tenth grade books. Student randomly takes one book. The chances that he'll choose the ninth grade book are:

A - 2/5

B - 2/3

C - 3/5

D - 1/25

Select the polynomial that can be factored as 2 (7x - 4) (7x + 4). A. 28x^2 - 32 B. 49x^2 - 16 C. 98x^2 - 46x + 32 D. 98x^2 - 32

Le doy 39 puntos para quien e resuelva el taller q nececito porfa y respuesta justificada

Suppose you have a budget of 450 dollars for one month. You would like to buy some textbooks and CDs. The average cost of a book is 55 dollars each and that of a CD is12 dollars each.

A pair of shoes jeremy has been watching for weeks finally went on clearance for 60% off the original ticket price of $180. When he gets to the register he finds out that all clearance items are an additional 20% off the sale price.

You took a random sample of 12 two-slice toasters and found the mean price was $61.12 and the standard deviation was $24.62. Construct a 95% confidence interval for the population mean. Assume the prices are normally distributed.

An penguin is 45 inches tall. It is 24 inches taller than a rockhopper penguin. Write and solve an equation to find the height of a rockhopper penguin. Is your answer reasonable? Explain.

Kyra observed that 85% of the students at a library liked reading mystery stories. If 30 students at the library did not like reading mystery stories, the number of students at the library who liked mystery stories was.

Two lines intersect and two of the vertical. angles measure 37 what is the measure of the other two vertical angles

S=1+2. t o instante que passa pela origem s=0

A rectangle has a length of 10 3/16 inches and a width of 6 7/8 inches. What is the perimeter of the rectangle?