Choose the ratio that is equivalent to this one: 7
-
4
A.
B.
21
21
12
C.

Y=4x^2+x-1 solve using quadratic formula

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?

Abus travels 36 miles in 45 minutes. enter the number of miles the bus travels in 60 minutes at this rate.