Simplify
x2 + y2
x2 + y2
(x +1)(x - 1)
x2 - 1
3(x+7)
3x+21
Josh is twice as old as Bob when Bob was 6. How old is Josh when Bob is 20?
26 y/o
2x = 14
x = 7
x2y3x4y-5
x6/y-2
(3x + 3)(2x - 1)
6x2 +3x - 3
3x(3x+2)
9x2 +6x
Albert and Robert’s ages together sum to 20. What will be the sum of their ages next decade?
40 y/o
3x - 9 = 25
x = 11.33
(2x5y5)11
2048x55y55
(x3 - 5x)(x2 + 2)
x5 - 3x3 - 10x
8-(7x+11)
-7x - 3
The length of a rectangle is 6 less than 3 times the width. What is the width if the perimeter is 28 m?
5 m
2(8 - x) = 2x+16
x = 0
(3x6y)2(xy3)
9(x^13)y^5
(x2 + 3x + 4)(2x - 5)
2x3 + x2 - 7x - 20
7x(x+x5)
7x6 + 7x2
Thomas invested $880, part at 9% annum and the rest at 12% per annum. After one year the total interest earned was $79.50. How much did he invest at each rate?
$870 at 9% and $10 at 12% per annum
[3x-4]/x = 12-9
N/A
(50x2y3)3(32x5) / x(x4)2(y2)3
9x2y3
(x2 + 3)(-2x + 1)(x - 2)
-2x4 + 5x3 - 8x2 + 15x - 6
3x(x3+4x+x)
3x4 +15x2
A big bus traveled a total of 630000 meters in 12 hours. The bus was travelling at 60 km/h for the first part of the ride. In the second part, they saw a unicorn and had to slow down and travel at 30 km/h. How long did they travel at 100000 cm/m? How much longer did they travel at 60 km/h than 30 km/h?
9 h, 6 h
[15x2 - 40] / x = 5[2x - x]
x = 2