Thursday
May 23, 2013

# Posts by PDF

Total # Posts: 18

trigonometry
Verify that following are identities: 1. cos 3t = 4 cos³ t-3 cos t 2. sin 4x = 8 sin x cos³ x-4 x cos x (use a double-angle identity)

math
1 letter - 4 (c, a, r, t) 2 letters - 6 (ca, cr, ct, ar, at, rt) 3 letters - 4 (car, crt, art, cat) TOTAL = 14 words Note: The total number of subsets of the word "CART" are 16, including the 4-letter word and an empty set.

Mathematics 1
In audition for school play, 70% passed the quality of the jurors for the first week. of those remaining, 20% were chosen. if only 7 were qualified, how many tried their luck?

MATHEMATICS_algebra
A man accepts a position at Php9000 a month with the understanding that he will receive an increase of 10% a year computed on the previous years salary. Form an equation that will compute how much he will receive a month after 10 years of service.

MATHEMATICS_algebra
X is a point between A(-5,-2) and B(5,13) such that AX:XB = 2:3. Find the coordinates of X.

MATHEMATICS_algebra
A man accepts a position at Php9000 a month with the understanding that he will receive an increase of 10% a year computed on the previous years salary. Form an equation that will compute how much he will receive a month after 10 years of service.

MATHEMATICS_ratio&proportion
X is a point between A(-5,-2) and B(5,13) such that AX:XB = 2:3. Find the coordinates of X.

geometry
Volume of a cube = s^3 then, the length of each side is 5 cm...

MATHEMATICS_algebra
A rectangular brass sleeve has a square base of side (x) cm and height (h) cm, its weight (w) kg is given by a formula w= (3x^2h)/10. How is w changed if x is trebled and h is halved?

MATHEMATICS_algebra
Find the speed of a train if an increase of 6kph lowers the time for a journey of 72 km by 10 minutes.

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