Can somebody help please.
1.Which relation is not a function?
A. {(7, 11), (11, 13), (-7, 13), (13, 11)}
B. {(-7,2), (3,11), (0,11), (13,11)}
C. {(7,7), (11, 11), (13, 13), (0,0)}
D. {(7, 11), (0,5), (11, 7), (7,13)}
2.Souvenir hats, T-shirts, and jackets are sold at a rock concert. Two hats, two T-shirts, and one jacket cost $141. Three hats, three T-shirts, and two jackets cost $239. One hat, three T-shirts, and three jackets cost $262. Find the prices of the individual items.
3.To solve a system of equations using the matrix method, use elementary row operations to transform the augmented matrix into one with _______. Then, proceed back to substitute.
4.Determine whether the function shown is constant, linear, quadratic, or none of these.
m(x) = -|x – 6| + 9
5. Solve the system using the Gauss-Jordan method.
2x – 3y – 9z = 12
4x + 5y – 6z = -14
-5x + 3y – 9z = 21
6. Write a function defined by y = ƒ(x), subject to the condition that the value of ƒ(x) is 16 times the square root of x.
7. Which of the following is a solution of 4x + 2y ? 6?.
8. Solve the system using the addition method.
-5x – y = 38
-6x – 3y = 60
