How do you add with decimals step by step?

From the beginning of the day the temperature rose 15 degrees so that by 4 pm it was 87 degrees. what was the temperature at the start of the day

|2x - 6| > 10 {x|x < -8 or x > 2} {x|x < -2 or x > 8} {x|-2 < x < 8}

Check all that apply. f is a function. f is a one-to-one function. c is a function. c is a one-to-one function.