7 apples cost $8. How many apples can i buy with $8? (Note:You can not buy a portion of an apple, so round down to the nearest whole number!!)

Quick! what is the area of this trapezoid?

How many different three-digit numbers can be formed using the digits 1 comma 2 comma 9 comma 6 comma 4 comma 3 comma and 8 without repetition? for example, 664 is not allowed.

Which function has an inverse function? a. f(x)= |x+3|/5 b. f(x)= x^5-3 c. f(x)= x^4/7+27 d. f(x)= 1/x²