The equation that can be used to find x, the length of a new dry wall screw is . The minimum allowable length for a new dry wall screw is , and the maximum allowable length is .

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.

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)

You need to solve a system of equations. you decide to use the elimination method. which of these is not allowed? 3x - 2y = 7 3x + 4y = 17 equation 1 equation 2