Solve the following simultaneous equations: x+ y = 3/2; x...
Solve the following simultaneous equations: x+ y = 3/2; x - y = 5/2 and use your result to find the value of 2y + x
-2
-1
1/2
1
31/2
Correct answer is D
x + y = 32 ... (i)
x - y = 52 ... (ii)
(i) - (ii):
2y = −22 = -1
y = −12
x + y = 32
x - 12 = 32
x = 32+12
= 42
x = 2
∴ 2y + x = 2(-\frac{1}{2}) + 2
= -1 + 2 = 1.
In \triangle PQR. T is a point on QR such that \(\angle QPT = 39^o and \angle PTR = 83^o. Calcul...
If x : y : z = 3 : 3 : 4, evaluate \frac{9x + 3y}{6z - 2y}...
A solid cylinder of radius 3cm has a total surface area of 36\picm2. Find its height...
In the diagram, QPS = SPR, PR = 9cm. PQ = 4cm and QS = 3cm, find SR. ...
Three boys shared some oranges. The first received \frac{1}{3} of the oranges, the second receiv...
Simplify \frac{3^{-5n}}{9^{1-n}} \times 27^{n + 1}...
If the scores of 3 students in a test are 5, 6 and 7, find the standard deviation of their scores...
Simplify, correct to three significant figures, (27.63)^2 - (12.37)^2 ...