Which of the following equations have exactly one solution? Choose all answers that apply:
-5x + 12 = 52 + 12
-5x + 12 = 5x - 5
--5x + 12 = -52 - 12
-5x + 12 = -122 - 12

The average human heart beats 1.15 \cdot 10^51.15⋅10 5 1, point, 15, dot, 10, start superscript, 5, end superscript times per day. there are 3.65 \cdot 10^23.65⋅10 2 3, point, 65, dot, 10, start superscript, 2, end superscript days in one year.how many times does the heart beat in one year? write your answer in scientific notation, and round to one decimal place.

Adiverr from the university of florida women’s swimming and diving team is competing in the ncaa zone b championships

Alex measured the length of an item to be 3.7 cm. the actual length is 3.5 cm. what is alex’s percent error?