Which of the following equations has a solution that is negative? A. 0 -0.4x + 4 = -1.6
B. -0.4(x + 1.6) = 1.6
C. -0.4(-x + 1.6) = 1.6
D. O- 0.4x - 4 + 1.6x = - 1.6

Plz i want answer and i would appreciate it is is a b c or d

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.

What is the ratio of the change in y-values to the change in x-values for this function? a) 1: 13 b) 2: 5 c) 5: 2 d) 13: 1