Search our library of Maths questions

Top answers

Maths

All levels

Solve these simultaneous equations; 2y + x = 8, 4 + 4y = 8x

equation 1: 2y + x = 8equation 2: 4 + 4y = 8xSolve by substitution;simplify equation 12y + x = 8 x = 8 - 2ysubstitute into equation 2 4 + 4y = 8(8 - 2y)4 + 4...

Answered by Josephine H. • Maths tutor

3680 Views

Solve 3x + 10 = 10(2x-5)

Multiply out the right hand side so equation becomes 3x+10=20x-50Move x's to one side and numbers to other so 17x = 60x= 60/17

Answered by Devin S. • Maths tutor

3066 Views

Express 126 as a product of its prime factors

(2)(63)-->(2)(3)(21)-->(2)(3)(3)(7)*(1)

Answered by Taner C. • Maths tutor

4168 Views

5 tins of soup have a total weight of 1750 grams. 4 tins of soup and 3 packets of soup have a total weight of 1490 grams. Work out the total weight of 3 tins of soup and 2 packets of soup.

Step 1 - Find the weight of 1 tin of soup: 1750 ÷ 5 = 350 Step 2 - Use this number (350) to find the weight of 1 packet of soup: (4x350) + 3P = 1490, 3P = 90, P=30Step 3 - Work out weight of 4 tins of sou...

Answered by Maddy C. • Maths tutor

10799 Views

Solving quadratic equations using the factorisation method.

The Form of a quadratic equation where a ≠ 0ax²+ bx + c = 0In order to solve we need to create one term made up of factors.One or more of these factors must equal zero.Questions we will work...

Answered by Clem E. • Maths tutor

3417 Views