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at a shop in the US tax is added onto the price of an item at the till. this shop adds 5.7% of the items value to the total cost. if you buy a ball priced as $15, how much will you have to pay ?

0.057 x 15 = 0.855 total = 15 + 0.988 = 15.855
MB
Answered by Merlin B. • Maths tutor
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Explore some of the imagery in Lord of the Flies

-Pathetic fallacy - the weather foreshadows events in the future, for example people getting killed after storms.-Piggy's glasses being broken symbolise a departure from society, and also foreshadows his dea...
EO
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With a bag of 5 blue marbles, 7 green marbles, and 3 red marbles. What is the probability of picking out two blue marbles? Pick them one at a time and do not replace them.

So there are 15 marbles in total (5 + 7 + 3) The probability of the first marble will be the number of blue marbles / total number of marblesTherefore, you do 5/15 = 1/3 Then for the second marble you do the...
CB
Answered by Christopher B. • Maths tutor
5123 Views

How do I solve the simultaneous equations 2x - y = 3 and 3x + y = 9

First of all you need to spot a way we can add or subtract these two equations together so that we can get rid of one of the terms . This is easily spotted by writing the equations like so:2x - y = 13x + y =...
JB
Answered by Joshua B. • Maths tutor
6469 Views

How do you factorise a quadratic expression using the formula

To factorise an expression of the formax 2 +bx+c We use the formulaX=(-b+/- (b^2-4ac)^(1/2))/2aExample:Factorise 3X 2 +2X+-1So here a=3 b=2 c=-1From the formula we get X=1/3 and X=-1And so our factorisation ...
KS
Answered by Kaitrin S. • Maths tutor
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