Algebra STAAR Test

A.2(I)

There are 15 plates in a kitchen cabinet. The diameter of each plate is either 7 inches or 12 inches. The diameter of all 15 plates combined is 140 inches.

Which system of equations can be used to find the number of 7 inch plates, x, and the number of 12 inch plates, y, that are in the cabinet?

• x + y = 140

  12x +7y = 15

• 7x +12y = 140

  7x +12y = 15

• x + y = 15

  7x +12y = 140

• x + y = 15

  12x +7y = 140

What is the solution set for -4x + 10 >= 5x + 55 ?

• x >= 5

• x >= 45

• x <= -5

• x<= -45

Which expression is equivalent to 2x² + (4x - 6x²) + 9 - (6x + 3)

• -4x² - 2x + 12

• -4x² - 2x + 6

• -10x + 6

• 18x + 12

Which expression is equivalent to (h² + 9h - 1)(-4h + 3) ?

• -4h³ - 33h² + 31h - 3

• 4h³ + 39h² - 23h + 3

• -4h³ - 39h² + 23h + 3

• 4h³ + 33h² - 31h + 3

A.11(B)

• 12kr⁷

• 72k²r¹⁴

• 144kr⁷

• 12k²r¹⁴

What is the range of y = -x² - 2x +3

• x <= 4

• x >= -4

• y <= 4

• y >= -4

Which function is equivalent to f(x) = -4 (x + 7)² - 6 ?

• f(x) = -4x² - 56x - 202

• f(x) = -4x² + 14x + 43

• f(x) = -4x² - 56x - 172

• f(x) = -4x² + 190

The graph of a quadratic function g is shown on the grid. What is the maximum value of g?

• 8

• 9

• 2

• -4

Which statement about g(x) = x² -576 is true?

• The zeros, -288 and 288, can be found when 0 = (x + 288)(x - 288)

• The only zero, 288, can be found when 0 = (x - 288)²

• The zeros, -24 and 24, can be found when 0 = (x + 24)(x - 24)

• The only zero, 24, can be found when 0 = (x - 24)²

The graph of quadratic function p is shown on the grid.

If k(x) = x² and p(x) = k(x) + n, what is the value of n?

• -6

• 6

• 3

• -3