Solve the system by substitution. 1.
5x + y = -17
-3x - 3y = 3

Solve the systems by elimination.

2.
x - y = 11
2x + y = 19

3.
-7x + y = -19
-2x + 3y = -19

4.
4x + 6y = 10
6x = 9y - 3

How many natural numbers n satisfy the inequality: 1/7 < n/10 < 4/5 ?

James is playing his favorite game at the arcade. after playing the game 3 times, he has 8 tokens remaining. he initially had 20 tokens, and the game costs the same number of tokens each time. the number tt of tokens james has is a function of gg, the number of games he plays

Need ! discuss how to convert the standard form of the equation of a circle to the general form. 50 points