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TAKS Exit Level Mathematics 2010 <strong>Re</strong>leased Items Objective 4 2 Which of the following best represents the solution to the system of linear equations shown below? 9 8 7 6 5 4 3 2 3x − 8y =−19 6x + 3y = 22 1 A x C –9 –8 –7 –6 –5 –4 –3 –2 –1 0 –1 1 2 3 4 5 6 7 8 9 –2 –3 –4 –5 9 8 7 6 5 4 3 2 y 1 B x D –9 –8 –7 –6 –5 –4 –3 –2 –1 0 –1 1 2 3 4 5 6 7 8 9 –2 –3 –4 –5 y –6 –7 –8 –9 –6 –7 –8 –9 Page 9 9 8 7 6 5 4 3 2 1 –9 –8 –7 –6 –5 –4 –3 –2 –1 0 –1 1 2 3 4 5 6 7 8 9 –2 –3 –4 –5 9 8 7 6 5 4 3 2 1 –9 –8 –7 –6 –5 –4 –3 –2 –1 0 –1 1 2 3 4 5 6 7 8 9 –2 –3 –4 –5 y –6 –7 –8 –9 y –6 –7 –8 –9 x x
TAKS Exit Level Mathematics 2010 <strong>Re</strong>leased Items Objective 5 1 Which lists the functions of the form y = ax 2 in order from the narrowest to the widest graph? A y =− x 2 , y = x 2 , y = x 2 , y =−2x 2 4 6 3 7 5 4 B y =−2x 2 , y = x 2 , y = x 2 , y =− x 2 6 3 4 5 4 7 C y = x 2 , y = x 2 , y =− x 2 , y =−2x 2 6 3 4 5 4 7 D y =− x 2 , y =−2x 2 , y = x 2 , y = x 2 4 6 3 7 5 4 2 If the graph of a function of the form y = ax 2 + c has a vertex located above the origin and opens downward, which of the following must be true about the values of a and c ? A a < 0 and c > 0 B a > 0 and c > 0 C a < 0 and c < 0 D a > 0 and c < 0 Page 10 3 What is the solution set for the equation 4n 2 − 9 = 23? A {−√ ___ 3.5, √ ___ 3.5} B {−4√ __ 2, 4√ __ 2 } C {−2√ __ 2, 2√ __ 2 } D {−4, 4}
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