On saturday, mrs. armour bought 7 pairs of socks for $3 each, and a sweater for her dog for $12. then she found a $5 bill on the sidewalk. over the course of saturday, what was the change in the amount of money mrs. armour had?

In 2009, there were 1570 bears in a wildlife refuge. in 2010, the population had increased to approximately 1884 bears. if this trend continues and the bear population is increasing exponentially, how many bears will there be in 2018?

The value of x in this system of equations is 1. 3x + y = 9 y = –4x + 10 substitute the value of y in the first equation: combine like terms: apply the subtraction property of equality: apply the division property of equality: 3x + (–4x + 10) = 9 –x + 10 = 9 –x = –1 x = 1 what is the value of y?

Which of the following is best modeled using a linear equation y=ax+b, where a is less than 0?