Determine the domain of the function f(x) = √x x² - 64 (Give your answer as an interval in the form (*, *). Use the symbol oo for infinity, U for combining intervals, and an appropria type of parenthesis " (", ") ", " [", "]" depending on whether the interval is open or closed. Enter Ø if the interval is empty. Express numbers in exact form. Use symbolic notation and fractions where needed.) Write co for positive infinity (without a '+' sign).

2.3 Rewrite without using the absolute value lx^2 + 2l. Check your answer by plugging x=1.  *those are supposed to be absolute value signs*

2. The new cookbook you just got gives all the oven temperatures in degrees Celsius but your oven uses degrees Fahrenheit. Additionally, your oven runs hot and you always have to decrease the prescribed temperature by 15° F. Write an expression using a composition of functions that will determine how high you have to preheat your oven when a recipe from your new cookbook calls for a temperature of t° F. (Hint: C-(F-32) and F=C+32 are the equations to convert between degrees Celsius C and degrees Fahrenheit, F.)

Ex1. For each relation, state the domain and range and whether the relation in a function a) b) c) d) 个y 个y 个y 4- 4- 10- 4- 2- 2- 2- 10 -5 5 10 -4 -2 -2- 4 4. -4-2 -2- 4 - 2- -5- –10- -4- -4-