The letters r and theta represent polar coordinates. Write the given equation using rectangular coordinates (x , y)
r=4costheta

What value is equivalent to 5 + [5 × (4 + 2)]? a) 35 b) 45 c) 60 d) 110

Fractions can be added and subtracted only if they're fractions. a. like b. proper c. improper d. unlike

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?