What is the result of adding these two equations?

-2x + 7 = - 5

-2x - 4y = 6

B and a win some money and share it in a ratio of 3:4 person b gets 39 how much does person a get?

Find the perimeter of a rectangle with a width of 2 times the square root of 5 plus 3 times the square root of 11 and a length of 3 times the square root of 5 minus the square root of 11

25 miles an hour equals how many meters per minute

Simplify and show all of your work. your answer should contain only positive exponents

A farmer finds that he can buy 5 sheep and 5 cows for $129or 10 sheep and 17 cows for $177. how much will it cost him to buy 3 sheep and 2 cows

Find b and c so that (5, b, c) is orthogonal to both (1,2,3) and (1,-2,1)

An office has an area 120 square meters and a width of 12 meters write an equation to represent the area

Using a decimal rounded to the hundredths, what is the probability of drawing a jock or a red card from a standard deck of playing cards?

Food high in B12 vitamin

Three numbers X, Y, and Z are in the ratio 2:7:8. If 12 is subtracted from Y, then three numbers form a geometric sequence (in the order X, Y-12, Z). Find X, Y, and Z.