A man 6ft tall casts a 21ft shadow. At the same time a tree casts a 70ft shadow. How tall is the tree?

What makes solar energy "green"?

2x-4y=8 x+2y=4 How many solutions (x, y) are there to the system of equations above? explain

5 Aaron wants to draw rectangles that each have an area of 36 square inches. The length and width of each rectangle are whole numbers of inches. Tell whether each statement about Aaron's rectangles is True or False a.

What is the exact distance from (-5, 1) to (3,0) ?

Javier bought 48 sport cards at a yard sale. Of the cards 3/8 were basketball cards. How many cards were baseball cards?

The total value of a collection of nickels and dimes is $3.05. If the number of nickels is 19 greater than the number of dimes. Which equation determines how many coins there are of each kind?

Write two decimals, each less than 1, which multiply to make 0.1

The sugar sweet company will choose from two companies to transport its sugar to market. The first company $3743 to rent trucks plus an additional fee of $225.75 for each ton of sugar.

8 less than a number n is less than 11

9a - [7 - 5 (7a - 3) ]