This is no mistake he is the one
You can use the is/of = %/100 formula, and just simply input the values.
Therefore, 170/580=%/100
580x=170,000
29.31
<span>8x² - x + x² + 4x - 9x² = 18
3x = 18 | 8x</span>² + x² - 9x² = 0<span>
x = 6 | divide by 3
Answer: x = 6</span>
20 and 0 are your answers
Area of parallelogram = base x height
Area = 6 x 5
= 30 unit ^2