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Expand and simplify (x-3)(3x+5)

This question requires us to know how to multiply out the brackets and collect like terms together. It is worth 3 marks in total. First, we draw a smiley face on the brackets in the question: link the x and ...
MP
Answered by Martha P. • Maths tutor
6039 Views

Solve simultaneously: x^2+y^2=25 and y-3x=13

The substitution method means we have to rearrange the linear equation to find a variable, either x or y, then substitute it into the quadratic (and more difficult to solve) equation, as follows...x 2 +y 2 =...
SC
Answered by Saffron C. • Maths tutor
3750 Views

Expand and simplify (x – 2)(2x + 3)

This question is 3 marks, looking for 2 marks of working and 1 for correct answer. This type of question is called expanding brackets. A simple way to do this is using the acronym FOIL (First, Outside, Insid...
FC
Answered by Freddie C. • Maths tutor
5432 Views

Simplify (14y^2)/y + 5y x 2

(14y^2)/y = 14y5y x 2 = 10y14y + 10y = 24yThe division and multiplication must be performed before the addition. This can be remembered with the acronym BIDMAS.
JM
Answered by Jacob M. • Maths tutor
3383 Views

10 girls and 15 boys sit a test. The mean mark for the boys is 70. The mean mark for girls is 82. Work out the mean mark for the whole class.

boys' total = 70 x 15 = 1050 girls' total = 82 x 10 = 820 Total = 1870 mean = 1870/ 25 = 74.3
SC
Answered by Sharon C. • Maths tutor
10989 Views