The State of Texas Assessments of Academic Readiness (STAAR) exam, administered MAY 2017.
More STAAR problems.
Administered May 2017
Read each question carefully. For a multiple-choice question, determine the
best answer to the question from the four answer choices provided. For a
griddable question, determine the best answer to the question.
51. Which expression is equivalent to (7x3)2(x8)1/2?
A 14x10
B 49x10
C 14x7
D 49x7
Answer: B 49x10
= (49x6)(x4)
= (49x10)
For powers of powers, multiply. So 3*2 = 6 and 8*1/2 = 4
For the same base multiplied, add the powers. So 6+4 = 10.
The 7 was squared, so it becomes 49.
52. The function y = 3.75 + 1.5(x - 1) can be used to determine the cost in dollars for a taxi ride
of x miles. What is the rate of change of the cost in dollars with respect to the number of
miles?
F $1.50 per mile
G $3.75 per mile
H $4.25 per mile
J $5.25 per mile
Answer: F $1.50 per mile
The rate of change is the coefficient of x, which is 1.5, or $1.50.
53. Which graph best represents a function with a range of all real numbers greater than or equal to -6?
Answer: C
The range is the y-values. You want a graph where the minimum value for y is -6. Nothing can go below that.
Graphs B and D go down to negative infinity, below -6.
Graph A does not include values for -6 < y < 0
54. What is the value of x in the solution to this system of equations?
y = 1/2 x + 4
F 6/5
G -2
H -10/3
J 3
Answer: G -2
y = 1/2 x + 4
so 1/2x + 4 + 2x = -1
2 1/2 x + 4 = -1
2 1/2 x = -5
x = -2
Checking the answer:
y = 1/2 (-2) + 4 = -1 + 4 = 3
(3) + 2(-2) = -1
3 - 4 = -1
-1 = -1 (check)
END OF EXAM.
More problems to come. Comments and questions welcome.
More STAAR problems.
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