Simultaneous equations - Jamb Mathematics Past Questions and Answers

Question 26:

• JAMB 1990

Given that x² + y² + z² = 194, calculate z if x = 7 and \(\sqrt{y}\) = 3

A. \(\sqrt{10}\)
B. 8
C. 12.2
D. 13.4

Question 27:

• JAMB 1991

Find the two values of y which satisfy the simultaneous equation 3x + y = 8, x\(^2\) + xy = 6.

A. -1 and 5
B. -5 and 1
C. 1 and 5
D. 1 and 1

Question 28:

• JAMB 1991

Find the positive number n, such that thrice its square is equal to twelve times the number

A. 1
B. 2
C. 3
D. 4

Question 29:

• JAMB 1993

Solve the following simultaneous equation for x. x² + y - 5 = 0, y - 7x + 3 = 0

A. -2, 4
B. 2, 4
C. -1,8
D. 1, -8

Question 30:

• JAMB 1994

If a = 1, b = 3, solve for x in the equation \(\frac{a}{a - x}\) = \(\frac{b}{x - b}\)

A. \(\frac{4}{3}\)
B. \(\frac{2}{3}\)
C. \(\frac{3}{2}\)
D. \(\frac{3}{4}\)