Q. Evaluate the expression shown below and write your answer as a fraction in simplest form.−57+72Answer:
Find Common Denominator: To solve the expression, we need to find a common denominator for the fractions−57 and 72. The common denominator for 5 and 7 is 35.
Convert to Equivalent Fractions: Now we convert each fraction to an equivalent fraction with the common denominator of 35. For the first fraction, we multiply both the numerator and the denominator by 7: −57×77=−3549. For the second fraction, we multiply both the numerator and the denominator by 5: 72×55=3510.
Add Fractions: Next, we add the two fractions with the common denominator: −3549+3510=35−49+10.
Perform Numerical Addition: We perform the addition in the numerator: −49+10=−39.
Final Combined Fraction: Now we have the combined fraction: (−39)/(35). This fraction is already in its simplest form because 39 and 35 have no common factors other than 1.