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Factorise 2x^2 - 7x -4

2 x -4 = -8 -8 x 1 = -8 (2x^2-8x)+(x-4) 2x(x-4) + 1(x-4) (2x+1)(x-4)
NM
Answered by Nicola M. • Maths tutor
3776 Views

A right-angle triangle has a hypotenuse of 8cm and an angle of 30 degrees. What is the opposite's length?

sinx = o/h sinx x h =o sin30 x 8 = 4cm The opposite is 4cm
NM
Answered by Nicola M. • Maths tutor
3945 Views

Solve the simultaneous equations 5x+2y=13 and x-2y=5.

5x+2y=13 + x-2y = 5 6x =18Firstly you need to either add or subtract one equation from the other. The way to decide this is to either focus on the x's or the y's. The trick to solving these simultaneous equa...
AJ
Answered by Amy J. • Maths tutor
5984 Views

Raya buys a van for £8500 plus VAT at 20%. Raya pays a deposit for the van. She then pays the rest of the cost in 12 equal payments of £531.25 each month. Find the ratio of the deposit Raya pays to the total of the 12 equal payments.

First find total cost with VAT. £8500 1.2 = £10200 To find deposit:£10200 - (12 £531.25) = £ 3825 To find ratio:3825 : (12*531.25)3825 : 63751 : (6375/3825)1 : 1.6 .
MP
Answered by Meg P. • Maths tutor
5870 Views

There is a Wheel of Fortune. The Wheel is numbered 1-15. Each section is equal in size. If the spinner lands on your number you win a prize. Ali has the number 6. What is the probability that he wins a prize? Give answer as percentage to 2 d.p

So because the wheel is split into equal segments. We can assume that if Harry has a single number then there is a 1/15 chance of Harry's number being chosen. To find the percentage you need to type 1 divide...
AO
Answered by Ama O. • Maths tutor
3928 Views