Amixture of 30 pounds of candy sells for $1.10 a pound. the mixture consists of chocolates worth $1.50 a pound and chocolates worth 90¢ a pound. how many pounds of the $1.50 chocolate were used to make the mixture?

a. 15
b. 10
c. 12

B. 10

Step-by-step explanation:

Let x represent pounds of chocolate worth $1.50 a pound and y represent pounds of chocolate worth 90¢ ($0.90) a pound.

We have been given that a mixture contains 30 pounds of both chocolates. We can represent this information in an equation as:

We are also told that a mixture of 30 pounds of candy sells for $1.10 a pound. We can represent this information in an equation as:

From equation (1), we will get:

Upon substituting this value in equation (2), we will get:

Therefore, 10 pounds of the $1.50 chocolate were used to make the mixture and option B is the correct choice.

x = ± 6i

step-by-step explanation:

x^2 = -36

take the square root of each side

sqrt(x^2) = sqrt(-36)

we know sqrt(ab) = sqrt(a) sqrt(b)

x = ±sqrt(36) sqrt(-1)

we know that sqrt (-1) = i

x = ± 6i

step-by-step explanation: