Sam is buying chairs that cost $15 and tables that cost $20. He wants to spend no more than $140. Let x be the number o chairs and y be the number of tables he buys. Write a linear inequality to describe the situation. Solve the inequality for y. Graph the inequality. What are two combinations of chairs and tables that Sam could buy?

How many grams must be adde to 970g to make 1 and a half kg

What is the length of the segment, endpoints of which are intersections of parabolas y=x^2− 11/4 x− 7/4 and y=− 7 /8 x^2+x+ 31/8 ?

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?