Find three ratios that are equivalent to 20:25

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

This is so hard and it’s for a test

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