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Expand the following brackets: a) 4(x+3) b) 3(x-1)-2(x+5) c) (y-3)^2 d) (y-2)^2 + (y+3)^2

a) 4x + 12 For this question you must expand out the bracket by multiplying the subjects within by the number at the front. 4x + (4 x 3) = 4x + 12 b) x - 13 Although this question looks more confusing, you s...
JF
Answered by Jasmin F. • Maths tutor
5791 Views

If a car drives at 5 ms^-1 for 10 seconds and then 6 ms^-1 for 5 seconds, how far has it travelled in total?

The equation used here is speed = distance / time (s=d/t). Firstly the 30 ms^-1. Rearrange the equation to find distance (st=d). 5ms^-1 x 10s = 50m. The second stint is 6ms^-1 x 5s = 30m. This makes the tota...
MP
Answered by Marcus P. • Physics tutor
3227 Views

what are the different kinds of adaptations?

Adaptations can be split into three categories: behavioural, physiological, and anatomical. Behavioural adaptations are those that change the way an organism acts, such as how it interacts with the environme...
CJ
Answered by Charlotte J. • Biology tutor
10548 Views

Find the equation of the tangent to the curve y = x2 -3x +5 at the point (1,3).

Find the equation of the tangent to the curve y = x 2 -3x +5 at the point (1,3).The tangent is a straight line of the form y = mx+cTo find the gradient, m, we first differentiate the function:dy/dx = 2x -3Th...
TD
Answered by Tilly D. • Maths tutor
7438 Views

Explain the major and minor keys using the circle of fifths.

The circle of fifths is an expression used to describe the relationship between the twelve chromatic notes of the musical scale (A-G with sharps and flats in between). By using the circle of fifths, you can ...
OG
Answered by Orla G. • Music tutor
5910 Views