When a calcium atom forms an ion, it loses two electrons. What is the electrical charge of the calcium ion? A. - 2 B. - 1 C. + 1 D. + 2

Zachary is solving the following equation. Which is the best first step to begin to simplify the equation? Multiply both sides of the equation by. Divide both sides of the equation by. Distribute over (x - 8). Distribute over (x - 8).

Which of the following are mathematical sentences? Check all that apply. A. 8-v B. 2<4 C. 6+4 = 10 D. 12 E. 8-d = 16 F. 10g

Make x the subject of the following y+2x=x-2

DVD cases are sold in packages of 20. Padded mailing envelopes are sold in packets of 12. What is the least number of cases and envelopes you could buy so that there is one case for each envelope with none left over?

F (x) = - 21x^2 + 63x + 84

The percentage of people accessing the internet from 61% in 2000 to 87% in 2012.

Mittens, a baby kitten, gained 120 grams of weight in 1/3 of a month. If mittens kept growing at this rate how much would he gain in a month

What is 8 times as many as 4

The oblique rectangular prism has a length of 6 cm, a width of 8cm, and a height of 7cm. what is the area of the base and volume of the prism?

Six students took a national standardized test for which the average score was 700 and the standard deviation was 150. If a student's z-value is 1.75 on the test, what was the student's score?