Sara made 8 necklaces. She used 9 beads on each necklace. The beads came in bags of 6 each. How many bags of beads did Sara need for all 8 necklaces?
8 bags
12 bags
15 bags
20 bags

The difference of 2 numbers is 21 and the quotient of the equation is 4 then what are the two numbers?

X+y=-4 x-y=2 use elimination with adding and subtraction

Aculture started with 4,000 bacteria. after 5 hours, it grew to 5,200 bacteria. predict how many bacteria will be present after 19 hours. round your answer to the nearest whole number.