For which of the following compound inequalities is there no solution ?

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

Which expression is equivalent to 16 in exponential form? a) 4 × 4 b) 8 × 2 c) 23 d) 24

Use the method of cylindrical shells to find the volume v generated by rotating the region bounded by the curves about the given axis.y = 7ex, y = 7e^-x, x = 1; about the y-axis