If 3p = 4q and 9p = 8q - 12, find the value of pq.
...If 3p = 4q and 9p = 8q - 12, find the value of pq.
12
7
-7
-12
Correct answer is A
9p = 8q - 12
9p = 2(4q) - 12
9p = 2(3q) - 12
9p = 6p - 12
3p = -12
p = -4
\(\frac{3 \times -4}{4} = \frac{4q}{4}\)
q = 13
pq = -3 x -4
= 12
A man bought a car for N800 and sold it for N520. Find his loss per cent ...
lf sin θ= \(\frac{-1}{2}\), find all the values of θ between 0° and 360°....
What is the equation of the curve? ...
Simplify 3\(\sqrt{45} - 12\sqrt{5} + 16\sqrt{20}\), leaving your answer in surd form....
In the figure, TSP = PRQ, QR = 8cm, PR = 6cm and ST = 12cm. Find the length SP...
If y varies directly as \(\sqrt{n}\) and y = 4 when n = 4, find y when n = 1\(\frac{7}{9}\)...