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What are tariffs and why are they used?

Tariffs are a tax a government puts on good which are imported into a country. This increases the price per unit of the imported good and is often used by governments o attempt to encourage individuals to pu...
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Answered by Nathan F. • Economics tutor
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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...
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Answered by Jasmin F. • Maths tutor
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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...
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Answered by Marcus P. • Physics tutor
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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...
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Answered by Charlotte J. • Biology tutor
10238 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...
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Answered by Tilly D. • Maths tutor
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