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Solve: 2x^2 + x = x^2 - 4(x+1)

First we need to start by multiplying the brackets on the right, which will give us:2x^2 + x = x^2 - 4x - 4Then we need to move everything that is on the right to left:2x^2 + x - x^2 + 4x + 4 = 0Here a co...

Answered by Rumen G. • Maths tutor

2949 Views

You are given a triangle ABC with sides length AB = 20cm, BC = 100cm and angle A = 70 degrees. Find the angle of C in degrees.

Always draw a diagram first to help with clarity.Correct use of Sine Rule:sin(A)/BC = sin(C)/ABTherefore sin(C) = ABsin(A)/BC sin(C) = 20sin(70)/100 sin(C) = 0.188 (rounded to 3 Significant Figures) C = a...

Answered by Arron P. • Maths tutor

2915 Views

Work out 5/6 + 3/7. Give your answer as a mixed number.

5/6 + 3/7= ((5 x 7) + (3 x 6))/(6 x 7)= (35 + 18)/42= 53/42= 1 11/42

Answered by Thomas R. • Maths tutor

10132 Views

Solve the equation 7x + 6 = 1 + 2x

7x + 6 = 1 + 2x7x + 6 -2x = 15x + 6 = 15x = 1-65x = -5x = -1

Answered by Thomas R. • Maths tutor

3005 Views

solve: [(3x-2)/4] - [(2x+5)/3] = [(1-x)/6]

On the first look, you may think that this question looks a bit complex, but if you have ,mastered the basics then you will have absolutely no trouble! Before you jump into this question, you should start...

Answered by Diana A. • Maths tutor

6902 Views