Top answers

How do you find dy/dx for a set of parametric equations?

Using the chain rule:If the parameter used is 't', differentiate each equation with respect to 't' so that you have answers for dy/dt, and dx/dt.From the chain rule it is known that: "dy/dx=dy/du * du/d...
FC
Answered by Federico C. • Maths tutor
9349 Views

expand and simplify x(3x-2)(x+1)

first expand the brackets (3x-2)(x+1) to get 3x 2 -2x+3x-2, then we can simplify this to get 3x 2 +x-2.Then multiply this by x to get the final answer: 3x 3 +x 2 -2x.
NA
Answered by Natalia A. • Maths tutor
9942 Views

Bananas cost 30p each. Oranges cost 45p each. Write an expression, in pence, for the cost of x bananas and y oranges..

Each banana cost 30p so the total price for bananas will be "number of bananas x 30". Here, bananas are called by the variable x so this number can be written as "30x" and will change dep...
LP
Answered by Léa P. • Maths tutor
5616 Views

Describe the life cycle of a virus.

Attachment. A virus, for example a bacteriophage attaches to the surface receptor of the host bacterial cell.Penetration. The virus injects the viral DNA genome through the cell wall and the cell membrane an...
CA
Answered by Celine A. • Biology tutor
4143 Views

Find the Maximum Point of this curve - -X^2 -7X -20

(-7/2,-31/4)
VN
Answered by Vishvan N. • Maths tutor
3633 Views