Mr Brown gives his class a test. The 15 girls in the class get a mean mark of 75%
The 20 boys in the class get a mean mark of 60%
Nick says that because the mean of 75 and 60 is 67.5 then the mean mark for the whole
class in the test is 67.5%
Nick is not correct.
Is the correct mean mark less than or greater than 67.5%?
You must justify your answer.

Lucy and donavan measured the length of the school garden. lucys measurement is 11.3m and donavans measurement is 113 cm. could both be correct? explain

Complete each statement from the information given and the triangle criterion you used. if the triangles cannot be shown to be congruent, leave the box for the second triangle blank and choose for reason “cannot be determined.” carbon - regular hexagon. ∆can ≅ ∆ by

The volume, v, of a rectangular prism is determined using the formula, where / is the length, w is the width, and his theheight of the prism. carltren solves for w and writes the equivalent equation w=using this formula, what is the width of a rectangular prism that has a volume of 138.24 cubic inches, a height of 9.6 inches,and a length of 3.2 inches?