(2a-b)(2n-m)
(2a+b)(m-2n)
(2a-b)(m+2n)
(2a-b)(m-2n)
Correct answer is C
m(2a - b) - 2n(b - 2a)
= m(2a - b) - (-2n)(2a - b)
= m(2a - b) + 2n(2a - b)
= (m + 2n)(2a - b)
Simplify \(3\sqrt{12} + 10\sqrt{3} - \frac{6}{\sqrt{3}}\)
\(7\sqrt{3}\)
\(10\sqrt{3}\)
\(14\sqrt{3}\)
\(18\sqrt{3}\)
Correct answer is C
\(3\sqrt{12} + 10\sqrt{3} - \frac{6}{\sqrt{3}}\)
= \(3(\sqrt{4 \times 3}) + 10\sqrt{3} - (\frac{6}{\sqrt{3}})(\frac{\sqrt{3}}{\sqrt{3}})\)
= \(6\sqrt{3} + 10\sqrt{3} - 2\sqrt{3}\)
= \(14\sqrt{3}\)
The volume of a cylinder of radius 14cm is 210cm3. What is the curved surface area of the cylinder?
15cm2
30cm2
616cm2
1262cm2
Correct answer is B
\(V = \pi r^2 h\\
210 = \frac{22}{7} \times 14^2 \times h \\
h = \frac{210}{22 \times 28}\)
Curved surface area \(= 2r\pi h\\
= 2 \times \frac{22}{7} \times 14 \times \frac{210}{22 \times 26} = 30cm^2\)
35.75m
25.00m
22.98m
19.28
Correct answer is A
\(\tan 40° = \frac{30}{|PQ|}\)
\(|PQ| = \frac{30}{\tan 40°} = \frac{30}{0.839}\)
= 35.75m
42o
39o
38o
30o
Correct answer is A
No explanation has been provided for this answer.
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