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If x is directly proportional to y^3 ad x = 32 when y = 2. Find the Equation connecting x and y.
x = 4y^3
108 identical book have a mass of 30 kg. Find the mass of 150 books.
41 2/3 kg
Eight men can build a bridge in 12 days. Find the time taken for 6 men to build the same bridge. 16
16 days
If x is inversely proportional to y and x = 40 when y = 5. Write the equation connecting x and y.
x = 200/y
Give the equation for this graph.
y = 9
Give the equation of this line.
x = 3
What is the value of y in the equation 2x -3y = 2, when x = - 0.5
y -1
- x +2y = 4 is a line. (r, 0.5) lines on the graph. Find the value of r.
-3
Give the coordinates of the intersection.
(2,2)
Use the elimination method to solve 3x-y= 12 and 2x +y = 13.
x=5 an y =3
Use Elimination method to solve 7x - 2y = 21 and 4x +y = 57
x = 9 and y = 21
Simplify -3x(3-4x) = -9x + 12x^2
-9x + 12x^2
(3x+8)(5x-9)
15x^2 +13x - 72
Factorise x^2 - 7x +12
(x-3)(x-4)
Expand (5n - 4)^2
25n^2 - 40n + 16
Factorise 4u^2 - 8u -21
(2u+3)(2u-7)
Expand (2x+7)^2
4x^2 + 28x + 49
Solve the equation x(x+6) = -5
x is -1 or -5
What are the coordinates of the maximum point and give the equation for the line of symmetry.
(-2, 4) x = -2