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Sarah used to earn 80£ per week, however she was given a 5% pay rise, what are her weekly earnings now?

METHOD 1:Required Formula: Percentage Change(%)=100x(Final value -Initial value)/(Initial value) Percentage Change = 5% (this is positive 5% since Sarah has a price raise, if Sarah had a 5% wage decrease the...
JK
Answered by Jonathan K. • Maths tutor
4259 Views

x = 3t - 4, y = 5 - (6/t), t > 0, find "dy/dx" in terms of t

2t -2
TJ
Answered by Tariq J. • Maths tutor
8827 Views

Work out the number of people in the office.

In an office there are twice as many females as males. 1/4 of the females wear glasses. 3/8 of the males wear glasses. 84 people in the office wear glasses. Work out the number of people in the office.Let th...
LL
Answered by Linyu L. • Maths tutor
4803 Views

3/5 of a number is 162. what is the number?

SOLVING ALGEBRAICALLY3/5 of "a number" = 3/5 of "x"3/5 of x is equivalent to (3x)/5(3x)/5 = 162Move the "5" to the other side by multiplying:3x = (162x5) = 810We now have 3x = 8...
FJ
Answered by Fred J. • Maths tutor
4240 Views

Show that tan(x) + cot(x) = 2cosec(2x)

For this we have to use trignometric identities, e.g Tan(x)= sin(x)/cos(x), sin 2 (x) + cos 2 (x) = 1, 1/sin(x) = cosec(x) tan(x) + cot(x) = sin(x)/cos(x) + cos(x)/sin(x) = [sin 2 (x) + cos 2 (x)]/sin(x)cos(...
MB
Answered by Moin B. • Maths tutor
12081 Views