Use the grouping method to factor this polynomial.
x2 + 3x2 + 3x +9
a. (x+3)(x+3)
b. (x2 +2)(x+3)
c. (x2+2)(x+2)
d. (x2 + 3)(x + 2)

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.

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

Which table represents a linear function? i'll give brainliest to first answer ^'^