Using symbols. There are 3 shelves. Each shelf has 21 books. How many books are there in all?

How do you shade 1/4 of a rectangle with 12 equal parts

What is the scale of a drawing where a 6m wall is 4 cm long

Between 22 and 28 miles on each gallon. if one gasoline. cost between $3.75 and $3.95 how much would it cost to travel 75 miles

Find the angle of elevation of the sun from the ground to the top of a tree when a tree that is 10 yards tall casts a shadow 14 yards long. Round to the nearest degree. o 54 degrees. o 36 degrees. o 46 degrees. o 44 degrees

How is 6/10 72. How do you get 72?

Equation 1 is - 8x + y = - 13 Equation 2 is y = 8x + 5 The following system of linear equation has how many possible solutions? A. 1 Solution B. Infinite Solutions C. 2 Solutions D. No Solution

How do I simplify x^2*y^-3*y

Alfie thinks that if he cuts a parallelogram along a diagonal, he will get two triangles that have the same shape and size. Is he correct? Construct a math argument to justify your answer.

Find all the real square roots of - 9/16 a. no real root b. - 3/4 c. - 3/4 and 3/4 d. 81/256

a car has 15 gallons of gas in its tank the car travels 35 miles per gallon of gas how much gas does the car used to go 100 miles