Which is a certificate of debt issued by corporations and governments?

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

Convert the mixed numbers into improper fractions. convert the improper fraction to mixed numbers.

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