Choose an expression that matches the following sentence: The sum of 5 times a number plus 2. A. 5x + 2 B. 5 + 2 C. 5x – 2 D. 2 + 5 + x E. 2 - 5

With this one. will mark brainliest

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.

Prove that quadrilateral is a rhombus.