W(n)=n-5; find(4) evaluate function

Which is the most efficient first step to solve x in the equation 3.7x - 18 = -4.3x -34 a. add 3.7x to both sides of the equation. b. add 4.3x to both sides of the equation. c. subtract 18 from both sides of the equation. d. subtract 34 from both sides of the equation.

The diameter of a circular chip is doubled to use in a new board game. the area of the new chip will be

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class