Search our library of homework questions

Top answers

All subjects

All levels

Solve algebraically the simultaneous equations x^2 + y^2 = 25 and y - 3x = 13

Start to solve by substitution: eqn 1 x^2 + y^2 = 25eqn 2 y - 3x = 13 => y = 3x + 13Substitute eqn 2 into 1: x^2 + (3x +13)^2 = 25expand and simplify the equation ...5x^2 + 39x + 72 = 0

Answered by Rosita R. • Maths tutor

2579 Views

Discuss the perfect competition model?

many buyers and sellershomogenous goodsno barriers to entry and exitperfect knowledge No sunk costsunrealisticno place for monopolies/oligopolies

Answered by Perdita S. • Economics tutor

1524 Views

Discuss ageing populations and policies to counteract this

example japan creates issues of high dependency, especially on young population reduces work force and causes social burden
policies:increase retirement ageencourage children: eg subsidies in France ...

Answered by Perdita S. • Geography tutor

1605 Views

Describe the structure of proteins in terms of Primary, Secondary, Tertiary and Quaternary structures

The primary structure comprises of the original sequence of amino acids resulting in a polymer of amino acids. These are joined to adjacent amino acids through by peptide bonds, formed by condensation rea...

Answered by Kashif Q. • Biology tutor

4015 Views

What are the differences between mitosis and meiosis?

Both are forms of cell division Mitosis"Normal" cell division- how cells increase in number 1 "parent" cell produces 2 "daughter" cells All the cells involved are gene...

Answered by Amy B. • Biology tutor

2270 Views