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A washing machine costs £500 in a sale and was reduced by 20%. What was its original price?

Maths is pretty straight forward, you just need to get the key information out the question.So, we have a washing machine that costs £500 on sale. It has been reduced by 20%, so we need to find the origin...

RS
Answered by Raghavi S. Maths tutor
4282 Views

Use calculus to find the set of values of x for which f(x) = x^3 - 9x is an increasing function.

f(x) is an increasing function when its gradient is positive. To find the the gradient of the the function we must differentiate it:d/dx f(x) = 3x2 - 9. To differentiate we multiply the exponen...

Answered by Maths tutor
5283 Views

Define the term gland and give two examples of endocrine glands in the human body.

Definition: an organ or tissue that synthesises and secretes a chemical messenger such as a hormone into the blood plasma.Examples: pituitary gland, thyroid gland (other relevant).

Answered by Biology tutor
3125 Views

What is the difference between 'je serai' and 'je serais'?

Although both of these sounds the same when spoken out loud, 'je serai' is the first person singlular simple future conjugation of 'etre' - 'to be', (as in 'je serai, tu seras, il/elle/on sera, nous seron...

LP
Answered by Lily-Ann P. French tutor
21381 Views

3 green balls, 4 blue balls are in a bag. A ball is removed and then replaced 10 times. What is the probability that exactly 3 green balls will be removed?

(Binomial)P(G=3) : (10C3)(3/7)3(4/7)7

Answered by Maths tutor
3100 Views

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