NEED ANSWERS RN. WORTH 100

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.

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}

Which value of m will create a system of parallel lines with no solution? y = mx - 6 8x - 4y = 12