Algebra
Solve for y:
y = 4x + c
x = 3
c = -5
What is 7?
y = 4 * 3 - 5
y = 12 - 5
y = 7
Round this number:
672 cm to (1sf)
What is 700 cm?
1 significant figure is the first information holding number.
The rest are rounded.
The total internal angle of a triangle:
What is 180o
Convert 4370 ml to L
What is 4.37 L ?
Divide by 1000.
The name of this famous expression:
C2 = A2 + B2
What is Pythagoras's theorem?
Simplify:
3x2y2 * 4xy3
What is 12x3y5 ?
When multiplying powers of exponents you add them!
Simplify into the smallest fraction possible:
24/44
What is 6/11?
Both can be divided by 4!
Complementary angles add up to:
That is 90o?
21000 mm3 given as cm3:
What is 21cm3 ?
you need to divide by 10 three times,
one for each dimension!
The name of all 3 trigonometry functions:
What is:
Sine
Cosine
and Tangent?
Expand and simplify
(x - 9)(x + 3)
What is x2 -6x -27 ?
x2 +3x -9x -27
= x2 -6x -27
0.00315 mol in standard form:
What is 3.15 x10-3 mol ?
The decimal is moved back 3 places to make one number the place holder.
The formulae used to calculate the total internal angle of any polygon:
What is 180*(n-2)?
The weight of a chocolate bar is 55 g.
The weight (in kg) of a box of 50 chocolate bars is:
What is 2.75kg
55 g x 50 g = 2750 g
2750 g / 1000 = 2.75 kg
The trigonometric ratio of the opposite side divided by the Hypotenuse:
What is sine?
Factorize:
x2 -5x - 24
What is: (x - 8)(x + 3) ?
-8 * 3 = -24
-8 + 3 = -5
To decrease a number by 15% you multiply by:
What is Multiply by 0.85 ?
Convert the percentage to a decimal, then subtract this from 1.
All three angles of this shape are 60o:
What is an equilateral triangle?
A box is 3cm by 6cm by 10cm
This box can hold ____ ml:
What is 180 ml?
3 x 6 x 10 = 180 cm3
180 cm3 = 180 ml
These are used to find the angle in a right angle triangle:
What is inverse Trigonometric functions?
The equation for this sequence:
1, 4, 7, 10, 13
What is: y = 3x -2 ?
First difference = 3
3 x 1 = 3 (need to subtract 2)
There is a ratio of 6:4 boys to girls at a concert.
If there is 24 boys there is ____ girls
What is 16 girls?
24 / 6 = 4
4 x 4 = 16
Opposite angles of this shape add to 180o
What is a cyclic quadrilateral?
The formulae
v = 4/3 * pi * r3
is used to calculate the volume of:
What is a sphere?
Trigonometry and Pythagoras are only used to solve:
What is a right angle triangle?