The absolute value of 15.3 is the opposite of 15.3?

For what value of x does 4x = (1/8) x + 5?

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.

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles