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This is a very common type of question that might be asked in an exam and there are 3 methods we could use to solve this; by substitution, by elimination (or subtraction) or by using straight line graphs....

BIDMAS 

Following BIDMAS, multiply the bracket out before the addition of the 2y.

3y(5y+3) = 15y²+9y 

adding the 2y gives the calculation of 15y² + 9y +2y = 15y<...

Meiosis is a specific type of cell division. Unlike mitosis, which results in 2 identical copies of the mother cell, meiosis creates 4 daughter cells each containing half of a normal gentic material (we r...

32 mmol = 0.032 mol

75cm³ = 0.075dm³

n = c x v    so   c = n / v

c = 0.032mol/0.075 dm³ = 0.426moldm^-3

pH = -log[H+]

pH = -lo...

Cardiac muscle is myogenic i.e has the ability to contract naturally, without external stimuli, such as action potentials arriving via nerves. For the whole heart to contract in an organi...