How do I find the area of a triangle?

Laura has scored 75, 85, 81, 67, and 91 on her previous five tests. What score does she need on her next test so that her average (mean) is 77?

The scale of a model train is 4 inches to 30 feet. One of the cars of the model train is 6 inches long. What is the length, in feet, of the actual train car?

Which is greater 7cm or 3in

A building casts a 103 foot shadow at the Same time a flagpole that is 32 feet tall casts a shadow 34.5 feet long how tall is the building

Of the students at Milton Middle School, 153 are girls. If 45% of the students are girls, how many total students are there at Milton Middle school?

X^2+y^2+3x=0 Find the x and y intercepts

Joan is building a sandbox in the shape of a regular pentagon. The perimeter of the pentagon is 35y4 - 65x3 inches. What is the length of one side of the sandbox? 5y - 9 inches 5y4 - 9x3 inches 7y - 13 inches 7y4 - 13x3 inches

Find the volume of the triangular prism. The base of the triangle is 4cm and the height of the triangle is 6cm. The length of the prism is 3cm

Problem construct a triangle with interior angle measures of 60° and 60° let one of the side lengths beaten what are the length of the other side

Is - x^2 = 0 a quadratic equation?