Draw algebra tile models to prove that 4+8x and 4(2x+1) are equivalent

Which of the following is a function? a.) {(-2, -4/5), (-1,-,,-1)} b.) {(-2,,1/,3/,1)} c.) {(-22)} d.) {(-21)}

Julie goes to the sports store and spends $40.50 before tax. she buys a pair of shorts for $21.75 and 3 pairs of socks that each cost the same amount. how much does each pair of socks cost? $$

Zahra runs a 500-meter race at a constant speed. which graph shows her distance from the finish line during the race?