Top answers

y is proportional to x^2. When y=45, x=3. Find a formula for y in terms of x.

If y is proportional to x then you can write y=kx^2 where k is a constant you are trying to find. Then substitute in the values you have been given for x and y. This gives you 45=k(3)^2. Then work to solve t...
AP
Answered by Abbey P. • Maths tutor
19689 Views

What is the difference between the perfect and imperfect tenses in French and when are they used?

There are mainly two tenses used in French to discuss what happened in the past, these being: the perfect and imperfect.However, both of these tenses are used in different ways based on what the speaker inte...
JH
Answered by Joe H. • French tutor
5798 Views

Find the inverse of a 2x2 matrix

Consider the 2x2 matrix M , consisting of elements a , b , c and d . To find its inverse one must first find the determinant of M . This is achieved by calculating the result of the expression ad - bc . The ...
GD
Answered by Giovanni D. • Maths tutor
5800 Views

Explain why a demerit good is overconsumed, if left to market forces.

A demerit good is a good which has a negative impact on its consumer and others in society. An example of this is alcohol, which can cause health problems for people who drink it, but also leads to external ...
HH
Answered by Henry H. • Economics tutor
16455 Views

Find the stationary point of the graph of y = 2x + 5 + 27x^(-2)

y = 2x + 5 + 27x -2 To find a stationary point, find the gradient function by differentiating with respect to x:y' = 2 -54x -3 To find a stationary point, let the gradient function equal zero:2- 54x -3 = 02 ...
HH
Answered by Henry H. • Maths tutor
4193 Views