1. Solve these systems of equations

Question

1. Solve these systems of equations
a. 3x + 6y + 3z= 3
    2x -   y  + 4z= 14
     x + 10y + 8z= -8

b. x + y + 3z= 10
    x + 2y + 3z= 4
    x + 4y + 3z= -6

2. Solve these systems of equations word problems.

a. A movie theater sold 450 tickets to a movie. Adult tickets cost $8 and children's tickets cost $6. If the theater took in a total of $3,250 from ticket sales, how many of the tickets were adult tickets and how many were children's tickets?

b. Bond A pays interest of 8% per year. Bond B pays interest of 10% per year. You are to invest a total of $100,000 and earn exactly $9,500 interest per year. How much should you invest in Bond A and in Bond B? (round to the nearest cent)

c. At a certain college, all courses are either 3-credit courses or 4-credit courses. Suppose a student has taken 16 course and has 53 credits. How many 3-credit courses and how many 4-credit courses has the student taken?

drwls · Answer

This is not a homework dropoff service. If you expect to learn high school algebra in college, it's time you made an effort.

LimaBeans93 · Answer

WOW. I know high school algebra. I am in the highest math class that freshman could even be in. I did all of the problems but those were tricky for me sir. I started them all but got stuck and I have proof. You shouldn't even respond if you're not going to offer any relevant help.

LimaBeans93 · Answer

And also I was in a gifted program in high school and graduated with a math average of a 97.37. I made more than an effort and can prove it. Before you assume know the facts.

john · Answer

a. A movie theater sold 450 tickets to a movie. Adult tickets cost $8 and children's tickets cost $6. If the theater took in a total of $3,250 from ticket sales, how many of the tickets were adult tickets and how many were children's tickets?