What is the second step you would take to solve the equation - 4x + 18 = 15?
A. Multiply both sides by 2.
B. Divide both sides by -2.
C. Divide both sides by -4.
D. Multiply both sides by 4.

Identify whether the figure has plane symmetry, symmetry about an axis, or neither.

5× 1/2 = ? a) more than 5 because you are multiplying by a whole number b) 5/10 because you multiply the numerator and denominator by 5 c) less than 5 because you are multiplying by a number that is more than 1 d) less than 5 because you are multiplying by a number that is less than 1

An automated water dispenser fills packets with one liter of water on average, with a standard deviation of 5 milliliter. the manual says that after a year of operation the dispenser should be tested to see if it needs recalibration. a year later a number of filled packets are set aside and measured separately. it is found that the average packet now contains about 0.995 liters. does the dispenser need calibration? explain your answer.