. 11. Se definen los siguientes conjuntos:
A:{ 1,4,5,6,8,9 } B:{ 1,3,6,9}
C:{1,3,4,6,7,9}
¿Cuál de las siguientes afirmaciones es
la correcta?
a) B+ A = C
b) BCA
c) BCA
d) BUA= C
​

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?

The sales tax rate is 7.25%. how much tax in dollars is added on an item that costs $56.00? a. $4.06 b. $7.25 c. $14.50 d. $60.06

Write the fraction 9/50 as a decimal if needed round to the nearest hundredth