Top answers

find 12% of £550 (non calculator)

First find 10% which is £55Next find 1% which is 55/10 = £5.50As 12% = 10% + 1% + 1%,12%= £55 + £5.5+ £5.5= £66
SV
Answered by Sachin V. • Maths tutor
6188 Views

How many thirds are there in 9?

In 1 there are 3 thirds so in 9 there will be 3x9 thirds which is 27 thirds.
SV
Answered by Sachin V. • Maths tutor
4066 Views

give the values of x when 2x^2+5x-3=0

First we need to find two numbers that multiply to make ac and add to make b which are -6 and 5 in this case.The two numbers that do this are 6 and -1. Now we separate the 5x into 6x and -x. Putting this int...
SV
Answered by Sachin V. • Maths tutor
3245 Views

Integrate the function f(x) = 1/(4x-1)

t Using the fact that d/dx ( ln g(x)) = g'(x)/g(x), we can see that the integral of this function will be an ln function. From observing f(x) we see that if the answer was ln(4x-1) then f(x) would need to be...
SV
Answered by Sachin V. • Maths tutor
9601 Views

In a tennis club, there are twice as many male members as female members. 1/3 of the males wear hats when they play. 1/4 of the females wear hats when they play. 66 members wear hats. How many members does the club have?

Let m be the number of males. Let f be the number of females. (1/3)m + (1/4)f = 66 (1) m = 2f (2) (1/3) * 2f + (1/4)f = 66 (substitute (2) into (1)) (2/3)f + (1/4)f = 66 (8/12)f + (3/12)f = 66 (11/12)f = 66 ...
NS
Answered by Neil S. • Maths tutor
4049 Views