What is the area of the real object that the scale drawings models? I just need someone to explain how to get the answer but I already answered the right one but I guessed.

For the function, f(x) = -5x 2, find f(-4).

What are the sotions to the quadratic equation 9x^2=4

Helll ! 1,400 tons of wheat of two different varieties was delivered to the silo. when processing one variety, there was 2% of waste and 3% during the processing of the second variety of wheat. after the processing, the amount of remaining wheat was 1,364 tons. how many tons of each variety of wheat was delivered to the silo?