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A scalene triangle has 3 angles ABC in degrees, where A = (3x + 7), B = (4x + 5), C = (x + 8). Find the value of largest angle.

Equate all the angles to 180 degrees.3x+7+4x+5+x+8=1808x+20=1808x=160Therefore, x=20 .Hence, A =3(20)+7= 67B =4(20)+5= 85C =20+8= 28 Therefore the largest angle is B.
AP
Answered by Alexander P. • Maths tutor
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25= x2 + 10 - 6. Find X

first take the 6 to the other side. 31 = x2 + 10Then take the 10 to the other side by taking it away from 3121= x2square root 21 inorder to find xx= 4.58
AN
Answered by Akhil N. • Maths tutor
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Differentiate y = 5x^3 + 7x + 3 with respect to x

When differentiating with respect to x, we multiply the coefficient of the 'x' by the power of the 'x', and subtract one from the power of 'x'. For example:y = 5x^5dy/dx = (5 5)x^(5-1) = 25x^4If the power of...
JK
Answered by Jordan K. • Maths tutor
4518 Views

How to factorise equations, or expand factorised equations?

Factorising x 2 -100: As there is no common element in x 2 or 100, we know this must consist of two sets of brackets not just one. we know both brackets must contain and x, and that which ever two numbers mu...
HH
Answered by Harleen H. • Maths tutor
3459 Views

(Core 2) Show that the region bounded by the curve y = 7x+ 6 - (1/x^2), the x axis and the lines x = 1 and x = 2 equals 16

The question wants us to confirm the answer so the marks will be in the method unlike most questions which require you to find the answer. How to approach this is by thinking what ways can we calculate areas...
LJ
Answered by Lewis J. • Maths tutor
4470 Views