Find value of 7.2 is equal to : ( in fraction form )

Find the value of 7^2 - 5^2

Find the value of, 72)^(2

87/7 is equal to the mixed fraction ________.

Find the value of (2/7)^-2

8 2/7 is equal to the improper fraction _______.

Find the value of | -7 | + | -2 |

In a fraction if both the numerator and the denominator are decreased by 1, it it is equal to 1/2. if the numerator is increased by 2 it is equal to 2/3 .find the fraction.

Find value of k if the equation having equal roots x^(2)-2x(1+3x)+7(3+2x)=0