Astudent sayd that the slope of the line for the equation y=20-15x is 20 and the y intercept is 15. find and correct the error

Is the orthocenter of a triangle on the inside ?

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.

Find the equation using the point (4,8)