Calculate the area of a square with sides that are 4cm long.
16cm^2
Solve:
2x + 7 = 13
x = 3

Right angle
Substitute x = 2 into 2x - 4
0
A rectangle has a width of 6cm and a length of 10cm. Calculate the perimeter
32cm
a x b = 18 and a + b = 9
What are the numbers?
3 and 6
Solve:
4j - 8 = 20
j = 7

Acute angle
Substitute x = 4 into 8x - 2
30
Find the value of each variable:
a + a = 10
a + b = 7
a - b + c = 4
a = 5
b = 2
c = 1
2x
___
9
Solve:
-8x + 3 = -13
x = 2
How many degrees in a straight angle?
Substitute t = 10 into 0.5t + 0.25
5.25
What is the area of a triangle with a height of 3cm and a base length of 10cm?
15cm^2
Sally can write 10 words every minute but has to subtract 2 words because of errors. Write an equation for this using m for minute and w for words.
w = 10m - 2
Solve:
(x+12) / 12 = 3
x = 24
An obtuse angle is between ___ and ___ degrees.
90 and 180 degrees
-2x - 16 = 10
Substitute x = -13
I am a number that is not attached to a variable. What am I?
A constant term
I am always at the front of a variable. What am I?
Coefficient
Solve:
(0.5c + 8) / 15 = 10
c = 284
How many degrees in a full revolution?
360 degrees
Substitute a = 3 and b = 7
a + (7b + 4) - 2b
= 42
Use prime factorisation to to factorise 48
3 x 2 x 2 x 2 x 2