−
50
54

−
100
40

+1.65=minus, start fraction, 54, divided by, 50, end fraction, minus, start fraction, 40, divided by, 100, end fraction, plus, 1, point, 65, equals

12x + 1 = 25 solve the following equation. then place the correct number in the box provided.

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.

Given the expression (7 ? 4i) ? (2 + 6i), perform the indicated operation and write the answer in the form a + bi.