Q1.
Put the value of n = 8 to the expressions:
2n + 10 → 2(8) + 10 = 16 + 10 = 26
A: 3n → 3(8) = 24 ≠ 26
B: 2(n + 5) → 2(8 + 5) = 2(13) = 26 :)
C: n² + 5 → 8² + 5 = 64 + 5 = 69 ≠ 26
D: 10n + 2 → 10(8) + 2 = 80 + 2 = 82 ≠ 26
<h3>Answer: B: 2(n + 5)</h3>
Q2.
x = 3, y = 2
L = 5y² - 2x → L = 5(2)² - 2(3) = 5(4) - 6 = 20 - 6 = 14
R = x² + ... → R = 3² + ... = 9 + ...
A: x² + x → 9 + 3 = 12 NOT
B: x² + y → 9 + 2 = 11 NOT
C: xy → 9 + (3)(2) = 9 + 6 = 15 YES
D: 2y → 9 + (2)(2) = 9 + 4 = 13 NOT
5y² - 2x < x² + xy
L = 14, R = 15, L < R CORRECT
<h3>Answer: C: xy</h3>
Q3.
3 + 6² = 3 + 36 = 39
A: 3³ + 12 = 27 + 12 = 39 NOT
B: 5² + 4² = 25 + 16 = 41 > 39 YES
C: 2³ + 5² + 6 = 8 + 25 + 6 = 39 NOT
D: 2³ + 14 + 17 = 8 + 14 + 17 = 39 NOT
<h3>Answer: B: 3 + 6² < 5² + 4²</h3>
