4 + 5 = 9
180 ÷ 9 = 20
Sand = 20×4 = 80
Cement = 20×5 = 100
The answer would be A. 5x^2 + 3x + 4.
No, as correlation does not necessarily imply causation. For example, although the number of ice creams sold and the number of people that fainted may have a strong positive association, this does not mean that buying ice creams causes people to faint - they are both responding to the variable temperature: this is known as a common response.
