Estimate the sum using compatible numbers Enter the answer in the box. 339+214. use __ for 339. Use 200 for 214. __ + 200= __

Amerchant has coffee worth $60 a pound that she wishes to mix with 50 pounds of coffee worth $90 a pound to get a mixture that she will sell for $70 a pound. how many pounds of the & 60 coffee should be used?

Which three lengths could be the lengths of the sides of a triangle? 21 cm, 7 cm, 7 cm 9 cm, 15 cm, 22 cm 13 cm, 5 cm, 18 cm 8 cm, 23 cm, 11 cm

How do you use the elimination method for this question? explain, because i really want to understand!