1) In Grade 7-Silang there are 60 students, 25 students like Math class and 47 students like English class. Find the number of students who both like Math and English class.

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.