108 identical books have a mass of 30 kg. Find the mass of 150 such books
the number of such books that have mass of 20 kg

The height of a triangle is 4 in. greater than twice its base. the area of the triangle is no more than 168 in.^2. which inequalitycan be used to find the possible lengths, x, of the base of the triangle?

Find the values of the variables and the lengths of the sides of this kite.

Right triangle abc has three sides with lengths ab= 119, bc = 169, ca= 120. find the value of cos c. hint: draw and label the triangle. the hypotenuse is always the longest.