Top answers

For a given function F(x), what does the graph of the function F(x+2) look like in comparrison to F(x)?

F(x+2) is simply F(x) but whenever you see an 'x' replace it with 'x+2'. So when x is say 3, F(x) is F(3) and F(x+2) is F(5). If we draw this out on a graph, we see that this has the effect of shifting the g...
JS
Answered by James S. • Maths tutor
3952 Views

Why do you want to become a doctor and not a nurse?

In my work experience I was able to sit in with both a doctor and a nurse to be able to thoroughly understand how their roles are similar and different; to be able to understand myself which career path I am...
VD
3121 Views

Emma wants to buy a radio, the full price is £80. In the shop, she is given a discount. A year later, she sells the radio for £78, giving her a profit of 30% of what she bought it for the year before. What discount did she receive? (4)

Finding what Emma paid for her radio £78 / 1.3 = £60 (M1) (A1) Finding what percentage of £80 that is £60 / £80 = 0.8 or 80% (M1) Recognising the discount is 20% ie. 1-0.8=0.2 (A1)
HR
Answered by Helena R. • Maths tutor
3464 Views

Explain the photoelectric effect, when does it occur and what is its significance in understanding the nature of light ? (6)

metal (unlike insulators ) contains free electrons (1) kinetic energy transferred from the light incident on the surface to the free electrons (1) The maximum kinetic energy of the electrons depends on the f...
HR
Answered by Helena R. • Physics tutor
2372 Views

In a class of 30, the ratio of boys to girls is 2 : 3 , how many girls are there?

If the ratio is 2 : 3 then in a class of 5 there would be 2 boys and 3 girls. So we can say that 2/5 of the class are boys and 3/5 of the class are girls. And we know that to calculate 3/5 of 30 we must firs...
RE
Answered by Rebecca E. • Maths tutor
49636 Views