Search our library of homework questions

Top answers

All subjects

All levels

When a nerve impulse arrives at a synapse, it causes the release of neurotransmitter from vesicles in the presynaptic knob. Describe how.

A nerve impulse is an electrical current that is transmitted down the axon of a neurone and to the synaptic knob. The impulse depolarises the membrane and causes a change in voltage across the membrane. T...

Answered by • Biology tutor

2622 Views

Evaluate the extent to which the process of selecting presidential candidates is deeply flawed

The primary process is criticised for being undemocratic due to the amount of power elites have in it. Staggered primaries are also criticised as they over exaggerates the importance of unrepresentative s...

Answered by Alicia B. • Politics tutor

15298 Views

¿Qué te gusta hacer en tu tiempo libre?

This question is to help with the speaking exam for GCSE. It is a very common question asked by examiners as it allows the student to show off vocabulary that they have learnt and allows different tenses ...

Answered by • Spanish tutor

7044 Views

A circle has equation: (x - 2)^2 + (y - 2)^2 = 16. It intersects the y-axis (y > 0) at point P and the x-axis (x < 0) at point Q. Find the equation of the line connecting P and Q and of the line perpendicular to PQ passing through the circle's centre.

(x - 2)² + (y - 2)² = 16 x = 0 --> 4 + (y - 2)² = 16 --> y - 2 = ±2sqrt{2} --> y = 2 ± 2sqrt{2} --> P(0,2 + 2sqrt{2})y = 0 --> (x - 2)² + 4 = 16 ...

Answered by • Maths tutor

3126 Views

Show that (x + 1)(x + 2)(x + 3) can be written in the form ax3 + bx2 + cx + d where a, b, c and d are positive integers.

(x + 1)(x + 2) = x^2 + 2x + x + 2 = x^2 + 3x+2therefore(x + 1)(x + 2)(x+3)= (x^2+3x+2)(x+3) = x^3 + 3x^2 + 2x + 3x^2 + 9x + 6 = x^3 + 6x^2+ 11x + 6where a=1 b=6 c=11 and d=9expansion of brackets can be do...

Answered by Jeremy T. • Maths tutor

3017 Views