Write and equation of a line perpendicular to X = -7 and passes through the point (4,9) Please help

Evaluate the expression for the given value of the variable 7a - 4a for a =8

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

The point of intersection of the diagonals of a rectangle is 4 cm further away from the smaller side then from the larger side of the rectangle. the perimeter of the rectangle is equal to 56 cm. find the lengths of the sides of the rectangle. 16 points answer quick