Joe has a farm with 30 animals. If he has chickens and cows with a total of 100 legs, how many chickens and cows does Joe have? CAN SOMEONE SOMEONE PLEASE HELP. IT IS FOR MY GRANDDAUGHTER WHO IS IN 8TH GRADE!!!

Write the expression in simplified radical form. show all steps and work including any foil method work. (hint: use the conjugate. no decimal answers.) (9-2√3)/(12+√3)

The graph shows the distance kerri drives on a trip. what is kerri's speed . a. 25 b.75 c.60 d.50

Aaron invested a total of $4,100, some in an account earning 8% simple interest, and the rest in an account earning 5% simple interest. how much did he invest in each account if after one year he earned $211 in interest? select one: a. $200 at 8%, $3,900 at 5% b. $3,200 at 8%, $900 at 5% c. $900 at 8%, $3,200 at 5% d. $3,900 at 8%, $200 at 5%