William bought 5 rulers for $7.50. If r represents the cost of one ruler, which equation represents this situation? Group of answer choices

5r = 7.50

r/5 = 7.50

r + 5 = 7.50

7.50r = 5

1. which of the following algebraic equations is equivalent to ? x^n = a a^n = x a^x = n x^a = n 2. 16^1/4= 1/2 2 4 3. (-36)^1/2= -6 1/6 no real number 4. 8^2/3= 4 8 16√2 )^5/2= 7,776 1/7,776 no real number 6. m ^ the square root of a^2m simplified is: 7. the square root of 3^3 times the square root of 2 simplified and in radical form is:

Math each whole number with a rational,exponential expression

Can someone me with the property questions for 12 13 and 14 plz