Point your mouse to check your answers

Question 1
If x = 5, find the exact value of these expressions:
I		II		III
(a)	2x + 3	(a)	3x2 - 25	(a)	4(x - 2)2
(b)	(2x - 1)(3x + 2)	(b)	(x - 5)(3x + 1)1/2	(b)
(c)	2x2 � 3x	(c)	10x5 � 2x3	(c)

Question 2
If x = 2 and y = - 5, evaluate these expressions:
I		II		III
(a)	3x + y	(a)	3(x + y)	(a)	10 - (x + y)
(b)	5(2x + y)	(b)	(3x - y)(4x + 3y)	(b)	(2x2 + y)(x + y2)
(c)	x3 + y3	(c)		(c)
(d)	5(x + y)2	(d)		(d)

Question 4

Find the value of if x = 4/9, y = - 2/3 and z = 4/7.

Question 5

Given that s = ut + 1/2 at2, find the value of s when u = 30.2, t = 3 and a = 9.8.

Question 6

If , evaluate r when a = 5.5 and b = - 3.2. Give your answer correct to one decimal place.

Question 7

Given that p = 1/2m(v2 - u2), evaluate p when v = 3.5, u = 2.5 and m = 10.

Question 8

Find correct to one decimal place the value of if M = 10.7, m = 7.4 and g = 9.8.

Question 9

Given that A = P(1 + r)n, find correct to two decimal places the value of A when P = 10 000, r = 0.08 and n = 12.5.

Question 10

If , evaluate V when r = 1.61, h = 3.52. Give your answer correct to two decimal places.

Question 11

Given that , find the value of d correct to three significant figures when T = 3.52 � 103 and r = 2.59 � 10-2.