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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.

Answered by Jacob M. • Maths tutor

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Integrate 3x^2

3x^2 Integrate you add one to the power and divide by that number. In this case:3x^2 = (3x^3)/3 = x^3

Answered by Jiano P. • Maths tutor

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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

Answered by Sharon C. • Maths tutor

8476 Views

The graph of y = x^2 – 1 is translated 3 units to the left to give graph A.The equation of graphA can be written in the form y=x^2 +bx+c Work out the values of b and c.

identify what the question is asking -> both translation rules and expansion of bracketstranslation rule --> translation of 3units left on x-axis actually gives a the graph of y=(x+3)^2 -1. This is ...

Answered by Georgia P. • Maths tutor

6594 Views

Solve simultaneously: 3x+2y=7 & x-2y=-3

Add the 2 eqns together to eliminate the y's to give: 4x=4. Divide by 4 to give x=1Now substitute x=1 into the first eqn: 3+2y=7. Subtract 3 from both sides -> 2y=4. Divide by 2 to give y=2.Now, check ...

Answered by Katie L. • Maths tutor

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