2x+y=-11; 3x-4y=11

How do I solve this by substitution?

Preparing for a visit to London, a New York resident exchanged 3,500 U. S. dollars for British pounds. (A pound is the basic monetary unit of Great Britain.) If the exchange rate was 125 U. S.

How many 1/6 are in 21/2

Sonja Koch has a $90,000 loan with a 9% annual interest rate. She paid $350 for a title background check, $400 for the title insurance, $250 for deeds and attorneys, and $8,690.40 in total interest for the first year.

If cos A = 3 over 11, then which of the following is correct? sec A = 11 over 3 csc A = 11 over 3 sec A = 3 over 11 csc A = 3 over 11

Using the ratio of perfect squares method, what is, square root of 108 rounded to the nearest hundredth.

Negitive 2x minus 3 equals 5 what is x equal too

What is - 54 minus - 25

Two triangles have side lengths 3, 4, 5 and 6, 8, 10, respectively. the triangles are similar to each other. a. True b. False

A 180 ft long board is cut into 3 pieces. The second piece of board is twice as long as the first. The third piece of board is six times as long as the first. What is the length of the first piece of the board?

If f (x) = 3x and g (x) = 5x-3 find gf (x)