Here are the test marks of 6 girls and 4 boys.

girls: 5 3 10 2 7 3

boys: 2 5 9 3

work out the mean mark of all students.

Which is bigger 15%or 1/5?

A mixed number greater than 12/4 and less than 15/4

42km in 180 minutes how many km per hour

Describe and correct the error in identifying the like terms in the expression 3x - 5 + 2x*2 + 9x = 3x + 2x*2 + 9x - 5 like terms:3x, 2x*2, and 9x

Quadrilateral PQRS has vertices P (-3, 2), Q (-1, 4), and R (5, 0). For each of the given coordinates of vertex S, determine whether the quadrilateral is a parallelogram, a trapezoid that is not a parallelogram, or neither.

432432 divided by the difference between 279279279 and 6363

The heights of women aged 20 to 29 are approximately normal with mean 64 inches and standard deviation 2.7 inches. men the same age have mean height 69.3 inches with standard deviation 2.8 inches.

Write this number in expanded form 208,000,478

How do fine the volume of a cone

Where do the lines modeled by the equations y = -7.8x+1.4 and y - 3.4x + 1.2intersect