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Solve the simultaneous equations: 2x + y = 5 , x + 4y = -22

Showing each step of working is important.First, we need to rearrange one of the equations to solve for x or y.If we rearrange the first equation to solve for y in terms of x we get: y = 5 - 2x ( by subtract...
JF
Answered by Joel F. • Maths tutor
3601 Views

The area of a parallelogram is given by the equation 2(x)^2+7x-3=0, where x is the length of the base. Find: (a) The equation of the parallelogram in the form a(x+m)^2+n=0. (b) The value of x.

(a)STEP 1: Take out the coefficient of x^2 from the x^2 and x terms. 2(x) 2 +7x-3=0 2(x 2 +(7/2)x)-3=0 STEP 2: Complete the Square by finding (b/2) 2 . (b/2) 2 .= (7/4) 2 Therefore, 2[(x+(7/4)) 2 -(7/4) 2 ]-...
MA
Answered by Marco A. • Maths tutor
3203 Views

Solve, using the quadratic formula, the equation x^2 +2x=35

suppose you have a general quadratic equation in the form ax 2 + bx + c = 0, then the solutions to this quadratic equation can be found by the equation x = (-b +/- (b 2 -4ac) 1/2 )/2aThe 'plus or minus symbo...
AS
Answered by Antonia S. • Maths tutor
4728 Views

5 pencils cost 50p , how many would 2 pencils cost?

work out in parts / ratio firstly work out how much one pencil costs, 50p divide by 5 = 10p1 pencil = 10p therefore, 2 pencils = 10p x 2 = 20p
MA
Answered by Marwa A. • Maths tutor
6970 Views

solve two variables quadratic equation system 2x-y=1 10x^2-y^2-x+1=0

To solve the equation, we need to try to make the second equation all in x first.From the first equation 2x-y=1,we could rewrite it into y=2x-1,Then we put y=2x-1 into the quadratic equation 10x 2 -y 2 -x+1=...
KM
Answered by KEYU M. • Maths tutor
3545 Views