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Assignment help 7426

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 

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