a) Steve has a broken calculator. When just turned on, it displays 0. If the + key is pressed it adds 51. If the – key is pressed it subtracts 51. If the × key is pressed it adds 85 and if the ÷ key is pressed it subtracts 85. The other keys do not function. Steve turns the calculator on. What...
one route from melbourne to sydney is 950 km. car A leaves melbourne travelling at 90 km/h and car B leaves sydney travelling on the same route at 100 km/h. where will the cars pass each other?
A four sided die and a six sided die, numbered 1 to 4 and 1 to 6 respectively are rolled.
What is the probability of Die 1 greater than or equal to Die 2, given that Die 2 is at least 3.
Please show working
a) Differentiate y=x^2+bx+c, and hence find b and c, given that the parabola is tangent to the x-axis at the point (5,0)
b) Differentiate y=x^2+bx+c, and hence find b and c, when x =3 the gradient is 5, and x=2 is a zero.