If selling expense is $100 when sales are $150, and if expense increases $1 for each increase of $3 in sales, write the straight-line relationship between expense and sales in slop-intercept form.

Louise measured the perimeter of her rectangular scrapbook to be 154 cm. if the scrapbook is 45 cm wide, how long is the scrapbook?

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

Frank owns a $141,000 home, for which he has a 30-year mortgage in the amount of $700 a month. once he has paid off mortgage, how much will he have paid in investment? a. $111,000 b. $109,000 c. $120,000 d. $141,000