£30 /hr

Joe D.

Degree: Philosophy, Politics and Economics (Bachelors) - Durham University

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#### Subjects offered

SubjectLevelMy prices
Maths A Level £30 /hr
Biology GCSE £30 /hr
Chemistry GCSE £30 /hr
Maths GCSE £30 /hr
Physics GCSE £30 /hr
Maths 11 Plus £30 /hr

#### Qualifications

EconomicsA-LevelA
Government and PoliticsA-LevelA
MathematicsA-LevelA
 CRB/DBS Standard No CRB/DBS Enhanced No

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#### Ratings and reviews

4.9from 79 customer reviews

Joslin (Student) March 22 2017

good

Dena (Parent) November 10 2016

Great explanation of numerical methods! thanks

Rayhaan (Student) November 1 2016

very good

Oyinda (Parent) August 15 2016

Very helpful and explained everything well
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### Differentiate with respect to x and write in its simpliest form, Y=(2x-3)/x^2?

Y=(2x-3)/x2 Quotient Rule: dY/dx(u/v)=(u'v-v'u)/v2 dY/dx=(2x2-2x(2x-3))/x4 =(6x-2x2)/x4    (Collect numerator x terms.) =(6-2x)/x3         (Cancel the fraction by a factor of x.) dY/dx=(6-2x)/x3

Y=(2x-3)/x2

Quotient Rule: dY/dx(u/v)=(u'v-v'u)/v2

dY/dx=(2x2-2x(2x-3))/x4

=(6x-2x2)/x4    (Collect numerator x terms.)

=(6-2x)/x3         (Cancel the fraction by a factor of x.)

dY/dx=(6-2x)/x3

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1 year ago

557 views

### State and explain two adaptations of a red blood cell?

Red blood cells have a biconcave disk shape, meaning that it increases their surface area and allows for more rapid diffusion of oxygen into and out of the cell. Red blood cells do not have a nucleus so they can contain more haemoglobin, this is what combines with oxygen to form oxyhaemoglo...

Red blood cells have a biconcave disk shape, meaning that it increases their surface area and allows for more rapid diffusion of oxygen into and out of the cell.

Red blood cells do not have a nucleus so they can contain more haemoglobin, this is what combines with oxygen to form oxyhaemoglobin and so the fact that red blood cells do not contain a nucleus means that they can maximise their oxygen carrying capacity.

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1 year ago

655 views

### Write a balanced chemical symbol equation for a reaction between Potassium and Water, including state symbols?

2K(s) + 2H2O(l) = 2KOH(aq) + H2(g) Potassium (K) is a group 1 metal, which is a solid. Water (H2O) reacts with Potassium to form Potassium Hydroxide (KOH) and Hydrogen (H2). Hydrogen exists naturally as a diatomic molecule and is usually a gas at room temperature, so it is written as H2(g).

2K(s) + 2H2O(l) = 2KOH(aq) + H2(g)

Potassium (K) is a group 1 metal, which is a solid.

Water (H2O) reacts with Potassium to form Potassium Hydroxide (KOH) and Hydrogen (H2).

Hydrogen exists naturally as a diatomic molecule and is usually a gas at room temperature, so it is written as H2(g).

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1 year ago

7221 views
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