Top answers

Find the co-ordinates of the turning point of the line with equation y = x^2 + ax + b that passes through (1, 47) and (2, 60)

y = x 2 + ax + bWhen x=1:47 = (1) 2 + a(1) + b47 = 1 + a + b46 = a + bWhen x = 260 = (2) 2 + a(2) + b60 = 4 + 2a + b56 = 2a + b Let this be equation 1Let 46 = a + b be equation 2Subtract equation 2 from equa...
HM
Answered by Henry M. • Maths tutor
3190 Views

John wants to invest £100 into a savings account for 15 years. If he invests in saving account A he will receive 3.5% simple interest and if he invests in savings account B he will receive 3% compound interest. Which account should he choose and why?

100 + (3.5 x 15) = 152.50 100 x 1.03 15 = £155.80 Therefore he should choose savings account B because after 15 years he will have gained more money through interest than in account A.
VD
Answered by Victoria D. • Maths tutor
3281 Views

ABC is an isosceles triangle such that AB = AC A has coordinates (4, 37) B and C lie on the line with equation 3y = 2x + 12 Find an equation of the line of symmetry of triangle ABC. Give your answer in the form px + qy = r where p, q and are integers (5

As we know that AC = AB, then it must be the case that BC is the base of the triangle (because it is isosceles). Therefore, the line of symmetry of the triangle ABC goes through the point A, and is perpendic...
SS
Answered by Sanjay S. • Maths tutor
18853 Views

Convert 0.22222222... (recurring) into a fraction

x=0.22222222...10x= 2.222222...10x-x=9x=2x=2/9=0.2222222... x=2/9
RG
Answered by Rachel G. • Maths tutor
12845 Views

Work out the gradient and y-intercept of the straight line with points A(3,8) and B(-2,-7)

Y= mx + cFinding m : change in y/ change in x => (8--7)/(3--2) = 3Finding c : input a pair of coordinates => 8 = (3 x 3) + c .... c = -1y = 3x -1
KR
Answered by Kim R. • Maths tutor
3102 Views