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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

Answered by Alexander P. • Maths tutor

2895 Views

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
2605 Views

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 = (55)x^(5-1) = 25x^4If the po...
JK
Answered by Jordan K. • Maths tutor
3550 Views

How to factorise equations, or expand factorised equations?
Factorising x²-100: As there is no common element in x² 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 whi...
HH
Answered by Harleen H. • Maths tutor
2762 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 ar...
LJ
Answered by Lewis J. • Maths tutor
3710 Views

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Top answers

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.

25= x2 + 10 - 6. Find X

Differentiate y = 5x^3 + 7x + 3 with respect to x

How to factorise equations, or expand factorised equations?

(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

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