A group of students take a test. The group consists of 12 boys and 8 girls.

The mean mark for the boys is 18

The mean mark for the girls is 16.5

Calculate the mean mark for the whole group.

Simplify: fraction numerator a to the power of 6 b to the power of minus 5 end exponent over denominator a to the power of minus 5 end exponent b to the power of 6 end fraction a-11b-11 a11b11 a to the power of 11 over b to the power of 11 a over b

The rectangle shown represents the base of a cracker box shaped like a rectangular prism. Use the ruler provided to measure the length and width of the rectangle to the nearest 1/4 inch. The height of the box is 6 inches.

Write (-32) ^2 as an expression without a negative exponent

What 3-d shape has 4 triangular faces and 1 rectangular face

Find the lowest common multiple of 14 and 18

63 is 25% of what number?

Finding a sales price original 280.00 discount 80%

Euler's formula, V - E + F = 2 relates the number of vertices V, the number of edges E, and the number of faces F of a polyhedron. How many faces does a polyhedron with 5 vertices and 8 edges have?

12. x2 - 25 = 0 solve for square roots

How many solutions does the equation have? |p - 4| = - 5