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Pre-test
Choose the letter of the correct answer. Write the chosen letter on a separate sheet of pas
1. If x = 5 and y = -2, what is the value of x2 + 3y?
A. -31
B-19
C. 19
D.31
2. Evaluate 2x2 - 5x + 10 if x = 4,
A. -22
B-6
C.6
D. 22
Pre-test
Choose the letter of the correct answer. Write the chosen letter on a separate sheet of pas
1. If x = 5 and y = -2, what is the value of x2 + 3y?
A. -31
B-19
C. 19
D.31
2. Evaluate 2x2 - 5x + 10 if x = 4,
A. -22
B-6
C.6
D. 22
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Answer:
1. x^2 + 3y = 5^2 + 3(-2)
= 25 + (-6)
= 19
2. 2x^2 - 5x + 10 = 2(4^2) - 5(4) + 10
= 2(16) - 20 + 10
= 32 + 10 - 20
= 42 - 20
= 22