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Points A and B have coordinates (–2, 1) and (3, 4) respectively. Find the equation of the perpendicular bisector of AB and show that it may be written as 5x +3 y = 10.

Formula for a straight line y-y 1 =m(x-x 1 ), where m is the gradient substituting in the values given to find the gradient we get 4-1=m(3+2), therefore m= 3/5the midpoint of the two points is ((x 1 + x 2 )/...
PM
Answered by Paige M. • Maths tutor
8536 Views

Find the values of x for which f(x) is an increasing function given that f(x)=8x-2x^2

When a function is increasing, it’s derivative is positive. So first let us differentiate f(x). To differentiate x n we multiply by n and then reduce the power by 1. So f’(x)=8-2*2x=8-4x. We want to find the...
RL
Answered by Ruby L. • Maths tutor
12563 Views

Benjamin has a 0.7 chance of passing his driving test the first time and a 0.85 chance of passing the second time. What is the probability of his passing on either the first or second try?

The probability of passing at either the first or second time round is P(passing first time) + P(taking the test for a second time then passing) = 0.7 + (0.85 x 0.3) = 0.7 + 0.255= 0.955 Clarification: you m...
RF
Answered by Rob F. • Maths tutor
4796 Views

Expand the brackets (2x + 3)(3x - 1)

Use the crab claw method to expand the bracket. Draw two lines above the equation from the 2X, one to the 3X and one to the -1. Draw another two lines below the equation from the +3, one to the 3X and one to...
CM
Answered by Caitlin M. • Maths tutor
8948 Views

Solve x^2-3x+2=0

Factorise into (x-1)(x-2) = 0 to find that x = 1 or x = 2
JY
Answered by Jason Y. • Maths tutor
3624 Views