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Solve the equation: x^2 + 9x + 20 = 0

This is a quadratic equation. There are different ways to solve quadratic equations including factorising them and using the quadratic formula. This is a simple equation so it cn be solved by factorising....

FM
Answered by Francesca M. Maths tutor
8060 Views

What is 3/5 of 65.

Break this question into 2.

  1. Divide 65 by 5 = 13

  2. 13 x 3 = 39

AA
Answered by Alice A. Maths tutor
11226 Views

In a sale, a bag goes on sale and the price is reduced by 20%. The sale price is £29.40. What is the original price of the bag.

The price of the bag has been reduced by 20% therefore the sale price of the bag is 80% of the full price. If we divide the sale price by 80 to get 1% of the price, we get £29.40/80 = £0.3675. We then mut...

AM
Answered by Aleyna M. Maths tutor
4082 Views

f(x)=3x+c g(x)=cx+8 fg(x)=6x+d Work out c and d.

fg(x) means f of g of x

fg(x) = 3(cx+8) + c = 3cx + 24 + c = 6x + d

3cx = 6x 3c=6 c=2

24 + c = d 24+2=d=26

CF
Answered by Ceri F. Maths tutor
3024 Views

let y=6x^-0.5+2x+1, find dy/dx.

dy/dx = -6(0.5)x^-1.5+2

         = -3x^-1.5+2

RL
Answered by Rodger L. Maths tutor
3511 Views

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