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I think of a number. I multiply it by 3 and then subtract 5. I get an answer of 16. What was the number I first thought of?

This question is asking us to work our way back and find the original number. We can refer to this number as 'x'. If we multiply x by 3 we get 3x. The next step is to subtract 5, so our equation now is 3x...

FA
Answered by Fizza A. Maths tutor
18039 Views

Factorise x^2-x-12

To factorise this equation we want to get 2 brackets. We are looking for 2 numbers which multiply to make -12 and add to make -1. So, let's see some factors of -12: -12 = (-1) x 12; (-2) x 6; (-3) x 4; (-...

FA
Answered by Fizza A. Maths tutor
19361 Views

Find the derivative of x(x+3)^5

First we use the product rule, so we multiply x by the derivative of (x+3)5. To find the derivative of (x+3)5 we use the chain rule. So we have 5(x+3)4. So the first part...

JY
Answered by John Y. Maths tutor
3049 Views

How does the pacinian corpuscle produce a generator potential?

A change in pressure causes a change in conformation/shape of stretch mediated ion channelsThis causes Na+ channels to flow across the membraneThis causes depolarisation at the Membrane producing our gene...

OT
Answered by Okuk T. Biology tutor
2626 Views

Describe the process of mitosis

Mitosis is the a form of cell division in which two genetically identical daughter cells are formed. It occurs to grow new tissue e.g. such as skin Before the cell divides it goes through a growth phase w...

OA
Answered by Omolara A. Biology tutor
2209 Views

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