Mathematics Past Questions and Answers

If tan y = 0.404, where y is acute, find cos 2y

A 0.035
B 0.719
C 0.808
D 0.927

Question 1042:

The ratio of boys to girls in a class is 5:3. Find the probability of selecting at random, a girl from the class

A \(\frac{1}{8}\)
B \(\frac{1}{3}\)
C \(\frac{3}{8}\)
D \(\frac{3}{5}\)

Question 1043:

\(\begin{array}{c|c} x & 1 & 4 & p \\ \hline y & 0.5 & 1 & 2.5\end{array}\). The table above satisfies the relation y = k\(\sqrt{x}\), where k is a positive constant. Find the value of K.

A 0.5
B 1
C 1.5
D 2

Question 1044:

\(\begin{array}{c|c} x & 1 & 4 & p \\ \hline y & 0.5 & 1 & 2.5\end{array}\). The table below satisfies the relation y - k\(\sqrt{x}\), where k is a positive constant. Find the value of P,

A 2
B 4
C 10
D 25

Question 1045:

What must be added to x² - 3x to make it a perfect square?

A \(\frac{9}{4}\)
B \(\frac{9}{2}\)
C 6
D 9