Search our library of homework questions

Top answers

All subjects

All levels

What is 2/5 + 3/4 ?

2/5 = 8/20 3/4 = 15/20

8/20 + 15/20 = 23/20

23/20 = 1 and 3/20

Answered by Kaya S. • Maths tutor

2268 Views

i) Using implicit differentiation find dy/dx for x^2 + y^2 = 4 ii) At what points is the tangent to the curve parallel to the y axis iii) Given the line y=x+c only intersects the circle once find c given that c is positive.

I don't know how effectively I can communicate this answer via text without the whiteboard but I'll try.

i) First implicitly differentiate with respect to x: 2x + 2y * dy/dx = 0.

Rearranging...

Answered by James D. • Maths tutor

4581 Views

Solve the simultaneous equations, 2x+y-5=0 and x^2-y^2=3

2x+y-5=0, y=5-2x (put into second equation)

x²-y²=3, substituting in we get, x²-(5-2x)²=3, expand, x²-(25+4x²-20x)=3, simplify, x

Answered by Joshua S. • Maths tutor

11742 Views

Explain why, for Locke, extension is a primary quality?

Locke founded the idea that we perceive qualities differently. He argued that primary qualities such as extension, size, shape and weight do not change when we perceive them. They are mind independent, ob...

Answered by Joshua S. • Philosophy tutor

9503 Views

How do you know which case to use after German prepositions?

There are three possible cases that follow prepositions: accusative, dative or genitive. The following prepositions are followed by the accusative case: bis,durch, fuer, gegen, ohne, um Example- Ich will ...

Answered by Thorkild V. • German tutor

9019 Views