0.8rad\(s^{-1}\)
2 rad\(s^{-1}\)
4 rad\(s^{-1}\)
8 rad\(s^{-1}\)
16 rad\(s^{-1}\)
Correct answer is C
V=rw, 8=2w, w=8/2= 4rad/s
0\(cm^3\)
9\(cm^3\)
10\(cm^3\)
90\(cm^3\)
100\(cm^3\)
Correct answer is C
V = \(\frac{m}{p} \, ice volume= 90 cm^3;water volume =100 cm^3\\
Volume change = (100-90) cm^3= 10 cm^3\)
Solve the equation log8x - 4log8x = 2
1/4
1/2
1
2
4
Correct answer is A
log8x - 4log8x = 2; log8x - log8x4 = 2
log8x/x4 = 2
x/x4 = 82 = 1/x3 = 64
x3 = (1/4)3; x = 1/4
Factorise: 6x\(^2\) + 7xy - 5y\(^2\)
(6x + 5y)(x - y)
(2x + 5y)(3x - y)
(3x + y)(2x - 5y)
(3x + 5y)(2x - y)
(2x + y)(3x - 5y)
Correct answer is D
\(6x^2 + 7xy - 5y^2\)
= \(6x^2 + 10xy - 3xy - 5y^2\)
= \(2x(3x + 5y) - y(3x + 5y)\)
= \((2x - y)(3x + 5y)\)
Which of the following is a root of the equation x\(^2\) +6x = 0?
0
1
2
3
It does not have any root.
Correct answer is A
\(x^2 + 6x = 0\)
\(x(x + 6) = 0\)
\(x = 0\) or \(x = -6\)