Waec Mathematics 2018 Past Questions and Answers

Question 51:

• WAEC 2018

The graph of y = x\(^2\) and y = x intersect at which of these points?

A. (0,0), (1,1)
B. (0,0), (0,1)
C. (1, 0), (0, 0)
D. (0, 0) (0, 0)

Question 52:

• WAEC 2018

A used car was purchased at N900,000.00. Its value depreciated by 30% in the first year. In each subsequent year, the depreciation was 22% of its value at the beginning of the year. If the car was bought on the 1st of March, 2011, calculate, correct to the nearest hundred naira, the value of the car on the 28th of February, 2015.

Question 53:

• WAEC 2018

(a) The graph of \(y = 2px^{2} - p^{2}x - 14\) passes through the point (3, 10). Find the values of p.
(b) Two lines, \(3y - 2x = 21\) and \(4y + 5x = 5\) intersect at the point Q. Find the coordinates of Q.

Question 54:

• WAEC 2018

(a) The diagonals of a rhombus are 10.2 cm and 9.3 cm long. Calculate, correct to one decimal place, the perimeter of the rhombus.
(b) Given that \(\sin x = \frac{3}{5}, 0° < x < 90°\), find the value of \(5\cos x - 4\tan x\).

Question 55:

• WAEC 2018

(a)
In the diagram
(i) The value of x; (ii)
(b) If \(2N4_{seven} = 15N_{nine}\), find the value of N.