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Expand (1+2x)(4x+3)

Deploy the FOIL method; First Outer Inner Last(1+2x)(4x+3) = 4x+3+8x^2+6x = 8x^2 + 10x + 3

BR
Answered by Ben R. Maths tutor
2557 Views

Work out 2 1/7 + 1 1/4.

It is important to notice that this is the addition of two mixed fractions which firstly needs to be changed into improper fractions. Take 2 1/7 - first multiply the denominator by the whole number to giv...

GH
Answered by Georgia H. Maths tutor
30222 Views

Solve the simultaneous equation: 2x - 5y = 9 , x + 6y = -4

First multiply the second equation by 2, so it becomes 2x + 12y = -8. Then subtract the second equation from the first one which gives (2x - 2x) + (-5y - 12y) = (9 - -8), -17y = 17. Therefore y = -1. Plug...

AC
Answered by Anagh C. Maths tutor
3840 Views

What is the distance between the points with co-ordinates (3,2) and (7,9)?

This question can be approached using the Pythagoras Theorem, with the line connecting these 2 points being the hypotenuse (longest side of the triangle). Side lengths:1) 7-3=4 2) 9-2=7Therefore, the dist...

SS
Answered by Shanmukan S. Maths tutor
2572 Views

The perimeter of a right-angled triangle is 72 cm. The lengths of its sides are in the ratio 3 : 4 : 5 Work out the area of the triangle.

Draw the triangle - recognising that it is a right angled trianglefind the scale factoruse the formula: 0.5 x base x height = area To find the scale factor you must divide the total perimeter by the sum o...

SC
Answered by Stella C. Maths tutor
2598 Views

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