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Work Out (2+11/15 )-(1+1/3)

= (30/15+11/15) - (3/3+1/3) = (41/15)-(4/3) = (41/15)-(20/15) = (21/15) = (7/5)
JC
Answered by Jack C. • Maths tutor
3348 Views

Find two values of k, such that the line y = kx + 2 is tangent to the curve y = x^2 + 4x + 3

There will be intersection when x^2 + 4x + 3 = kx + 2. Our goal is to find the values of k which would only give one solution to this quadratic equation, which would make the lines 'tangent' to each other. F...
AN
Answered by Andrew N. • Maths tutor
35876 Views

Factorise the following expression: 2(x^4) + 4(x^2) - 32(x^3)

2x 2 (x 2 + 2 - 16x)
TF
Answered by Tom F. • Maths tutor
3446 Views

Can two shelves of 0.72 meters long each store 50 30mm wide textbooks?

First, convert the units so you can compare more easily. 0.72m = 72cm = 720mm So 1 shelf is 720mm and 1 textbook is 30mm wide. To find the maximum number of books that can be stored on a shelf, you divide th...
VL
Answered by Valerie L. • Maths tutor
3765 Views

How do radians work? Why can't we just keep working with degrees in school?

Degrees are a made up unit; mathematicians simply decided that a complete revolution of a circle has 360 degrees, without that number actually meaning anything. Tecnically any number could have been picked t...
HD
Answered by Hans D. • Maths tutor
2392 Views