Which statement describes the first step to solve the equation by completing the square?

3x^2+18x=21

Multiply both sides of the equation by 19 .

Add 9 to each side of the equation.

Multiply both sides of the equation by 13 .

Add 81 to each side of the equation.

Solve the following inequalities and show the solution on a number line. 2x+3< 3(4x+5)

Need match the functions with correct transformation. f(x) = -3x f(x) = |x-1|+3 f(x) = √(x+3) 1/2x² f(x) = (x+1)²-3 4|x| 1. compress by a factor of 1/2 2. stretch by a factor of 4 3. shift to the left 3 4. shift to the left 1 5. shift up 3 6. reflection

He ! a group of farmers planned to clean 80 acres of wheat per day to finish the work on schedule. right before the work started, they received a new piece of machinery that them clean 10 more acres per day than originally planned. as a result of increased productivity in the last day before the deadline they only had to clean 30 acres. how many acres of wheat did the group of farmers have to clean?