There are 21 key rings. how many groups of 3 key rings can you make?

What is bigger 25 milligrams or 25 centigrams

What is 2:1/3 in a mathematics problems

Item 7 Solve the system of linear equations by substitution. -2x-5y=3 3x+8y=-6 solution: ( , )

Select the decimal number that is equivalent to the mixed number 94 79 / 100.

How many times larger is 9 * 1013 than 3 * 108?

Malia solved an equation, as shown below:Step 1: 6x = 48Step 2: x = 48 - 6Step 3: x = 42Part A: Is Malia's solution correct or incorrect? If the solution is incorrect, explain why it is incorrect and show the correct steps to solve the equation.

the lengths of the rectangle have been measured to the nearest tenth of a metre work out the following, writing down all the figures on your calculator display: a) The upper bound for the perimeter of the rectangle.

The measure of an angle is 28 greater than its complement. Find the measure of each angle.

Round 2.41 to the nearest whole number

How would I write 8 centimeters as a fraction