Could anyone help me please?

What is the standard form of -5x^2+2x^4-11+x^3+3x

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?

The frequency table shows the results of a survey comparing the number of beach towels sold for full price and at a discount during each of the three summer months. the store owner converts the frequency table to a conditional relative frequency table by row. which value should he use for x? round to the nearest hundredth. 0.89 0.90 0.92 0.96