Search our library of Maths questions

Top answers

Maths

All levels

y=x^2+5x+6 solve for x

to solve a quadratic we can use the quadratic formula: (-b+_sqr(b²-4ac))/2a
y=x²+5x+6
a=1b=5c=6
to get x=3 or x=2

2605 Views

The sides of a right triangle are equal to A=3 cm, B=4 cm. The hypotenuse of a second triangle similar to the first one is 15 cm. Find sides of the second triangle.

Firstly based on the Pythagoras Theorem which claims that the square of the hypotenuse is equal to the sum of the squares of the other two sides, we will find the hypotenuse of the first triangle. To make...

Answered by Esma X. • Maths tutor

2359 Views

Line L1 is y = 4x + 5, line L2 is 4y - 16x -2 = 0. Show that the lines are parallel to each other

4y-16x-2=04y=16x+2y=4x+0.5L1: y=4x+5 L2: y=4x+0.5Both lines have the same gradient and are therefore parallel to each other

Answered by Myles D. • Maths tutor

1934 Views

When rolling two dice, what is the probability of rolling 7?

16.7% or 1/6.The combinations for (dice 1, dice 2) which total 7 are: (6,1), (5,2), (4,3), (3,4), (2,5), (1,6).Total possible cocmbinations = 36.Hence 6/36=1/6=0.166... or 16.7%

Answered by Krzysztof J. • Maths tutor

2556 Views

(x + a)(x + 3)(2x+1) = bx^3 + cx^2 + dx -12, find the values of a, b, c and d.

This question is an example of expanding algeba and equating coefficients. If the brackets on the left-hand side are expanded the unknown values can be found from the coefficients on the right-hand side.S...

Answered by Joe S. • Maths tutor

6916 Views