Joan’s age is triple the age of her daughter. if joan is 42 years old, how old is her daughter?

10% of 1,900,000. show me how you got the answer

Solve the problem. a student earned grades of c, a, b, and a in four different courses. those courses had these corresponding numbers of credit hours: 4, 5, 1, and 5. the grading system assigns quality points to letter grades as follows: a = 4, b = 3, c = 2, d = 1, and f = 0. compute the grade point average (gpa) and round the result to two decimal places. 3.40 3.50 8.75 2.18

Which property was used to simplify the expression? 3c+9 +4c=3c+4c+9