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a) If x=4, work out 3(x^2). b) Solve 6x-3=x+11

a) Our first step is to replace 3(x^2) with 3(4^2) as x=4. Remembering BIDMAS (Brackets, Indices, Division, Multiplication, Addition, Subtraction), we know we must first work out the value of 4 squared, and ...
DH
Answered by Dina H. • Maths tutor
5130 Views

Express 56 as the product of its prime factors.

56 = 2 x 2 x 2 x 7.Prime numbers are the basic building blocks of all numbers. They can't be divided by any number apart from 1, or themseslves.
IR
Answered by Isiah R. • Maths tutor
36977 Views

Find the turning point of the line y = x^2 + 2x -1

d(x 2 +2x-1)/dx = 2x+2when dy/dx = 0, x = -1when x = -1, y = -2 therefore the turning point is (-1,-2)
EO
Answered by Ebun O. • Maths tutor
5178 Views

Solve the following simultaneous equations: 2x + y = 17, x - y = 4

2x + y = 17 x-y = 4 ---> x = 4 + y2(4+y) + y = 17 ------> 8 + 2y + y = 17 -----> 8 + 3y = 17 --------> 3y = 9 -----> y=3 x = 4+y ------> x = 7
GN
Answered by Gavra N. • Maths tutor
5985 Views

Solve the following simultaneous equation: 3x+y= 11 and 2x+y=8.

X= 3y= 2
LD
Answered by Lara D. • Maths tutor
4393 Views