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(1/2)x(5/8)=5/16

100/16=6.25

6.25 x 5 = 31.25

In order to answer this question you need to find out how much cement, sand and gravel is needed to make 180kg of concrete mix. To do this you must find out how many parts the concrete mix ratio is made u...

This question asks how students can formulate linear equations from worded questions. 

The first step is to give each person an algabraic symbol. j for John, s for Sandra and k for Kathy works fine...

Let's reorgansie the information we've been provided with in the question: Colour of marble - number of marbles in the bag Blue - 2x Green - 7 Red - 7x + 5 Orange - 4x - 3 Probability of the green marble ...

Factorise the numerator: x^2 + x - 6 = (x+3)(x-2)

Factorise the denominator: 3x^2 + 9x = 3x(x+3)

Cancel '(x+3)'

Answer: (x-2)/3x