Waec Mathematics Past Questions For Year 1989

Question 6

The graph above is that of a quadratic function y = 2x² - x - 6

The roots of the equation are

waec 1989

• A. 1.5, 2
• B. -1.5, 2
• C. 1, -6
• D. 1, 6
• E. -1, 6

Question 7

Evaluate \(\frac{0.009}{0.012}\), leaving your answer in standard form.

waec 1989

• A. 7.5 x 10²
• B. 7.5 x 10¹
• C. 7.5 x 10^-1
• D. 7.5 x 10^-2
• E. 7.5 x 10^-3

Question 8

Factorize 35 - 2b - b²

waec 1989

• A. (35-2b)(b-1)
• B. (7+b)(5-b)
• C. (3+7b)(5-b)
• D. (35-b)(3b+7)
• E. (7+b)(5+b)

Question 9

Evaluate, using logarithm tables \(\frac{5.34 \times 67.4}{2.7}\)

waec 1989

• A. 1.332
• B. 13.32
• C. 133.2
• D. 1332
• E. 13.320

Question 10

Using the above graph, if 10^o < x < 60^o, what is the value of x for which sin x = cos x?

waec 1989

• A. 0^o
• B. 20^o
• C. 30^o
• D. 45^o
• E. 50^o