19mm equivalent to how many cm

Dylan has 200 marbles. If Dylan has 10 times as many marbles as Robert, write an equation that shows how many marbles Robert has. Use r to represent the number of marbles of Robert has.

What is the simplified form of the equation 4/5n - 1/5 = 2/5n? A.) n = - 2 B.) n = 4 C.) n = fraction 1 over 2 D.) n = fraction 2 over 3

Write an equation of a line that is parallel to y = 3x + 4 and has a y - intercept of - 3

Hannah has a grid of squares that has 12 rows with 15 squares in each row. She colors 5 rows of 8 squares in the middle of the grid blue. She colors the rest of the squares red. How many squares does Hannah color red?

Misty wishes to obtain 85 ounces of a 40% acid solution by combining a 72% acid solution with a 25% acid solution. How much of each solution should Misty use?

Which equation can be used to find the volume of the cylinder?

F (x) = Square root of 4x+9

The spanish club has 78 members, 42 girls and 36 boys whats the ratio

Ribbon A is 1/3m long. Ribbon B is 1/4m longer than ribbon A. The length of ribbon C is 1 1/2 times the length of ribbon B. What is the length of ribbonC

Factor and simplify: 4a^2c^2 - (a^2-b^2+c^2) ^2