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Factorise a^2 - 5a – 14.

Step 1: (a )(a ) Step 2: identify numbers that can multiply to 14: 1 & 14, 7 & 2 Step 3: Identify which pair of numbers add together to make -5: 2 - 7 = -5 Step 4: Check signs: +2 and -7 Step 5: Answ...
JC
Answered by Jasmine C. • Maths tutor
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Solve the folllowing quadratic equation: y=x^2+x-6

y=x 2 +x-6 x= (-b+/- sqrt(b 2 -4ac))/2a a=coefficient of x 2 b=coefficient of x c=constant sub values in and find two solutions
EH
Answered by Eashan H. • Maths tutor
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3kg of meat costs £54, Nina buys 2 kg of the meat. Work out how much Nina pays. (non-calculator)

I used ratios in this context3kg : £54Using this ratio to work out the price of 2kg 2kg: £? To get from the number '3' to '2', I have to divide 3 by 3, then multiply it by 2So, using this same method (as I w...
PR
Answered by Phazilah R. • Maths tutor
16204 Views

work out 20% of 14000

First work out 10% of 14000.You do this by dividing 14000 by 10 as this will than be a 10th of 14000 and therefore 10%14000 divided by 10 = 1400as the question asks for 20% you will need to add another 10%14...
Answered by • Maths tutor
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Ball P is shot at 18m/s horizontally from the top of a 32m mast. Ball Q is shot at 30m/s at an angle 'a' to the horizontal from the bottom of the mast. They collide mid-air. Prove that cos'a' = 3/5

Consider the positions of each ball as a function of time. Distance (position) is equal to velocity times time. We want 'cos' in the answer, so we'll work with the x axis. For ball P, the position is equal t...
AF
Answered by Andrew F. • Maths tutor
3750 Views