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You have a bag of 60 coloured marbles. 1/10 are red, 3/5 are blue, and the rest are green. How many green ones are there?

1/10 * 60=6 red marbles 3/5 * 60=36 blue marbles Therefore the amount of green marbles must be 60-(6+36)=18
IC
Answered by Isabelle C. • Maths tutor
4790 Views

What is a radian?

A radian is the angle in a segment that gives an arc length of 1 radius. This is another way to measure angles instead of degrees. As the circumference of a circle is 2 pi r, we have 2 pi radiuses in the cir...
PA
Answered by Prince A. • Maths tutor
5443 Views

When using trigonometry to calculate side lengths/angles, how do you know which identity to use?

Choosing whether to use sin, cos or tan is what will gain you the majority of marks for a trig question. Firstly, you should label the three sides of the triangle as hypothenuse, adjacent and opposite. In a ...
RP
Answered by Rimka P. • Maths tutor
3761 Views

The equation of a circle is x^2-6x+y^2+4y=12. Complete the square to find the centre and radius of the circle.

When we complete the square, we're looking for an equation that looks like (x-a) 2 + (y-b) 2 = r 2 , where (a,b) is the centre and r is the radius. When we expand brackets using FOIL, the x part is (x 2 -2ax...
HA
Answered by Hubert A. • Maths tutor
5722 Views

differentiate- X^3- 2X^2+3

3-1=2 2X2 = 4 2-1= 1 =3x^2- 4x
RT
Answered by Radhika T. • Maths tutor
4829 Views