Answer: 8cm
Step-by-step explanation:

Solve for h;



There are 15 mystery books are on the shelf
Answer:
perimeter: 22ft
area:
be warned, i dont know if the are is correct but that is what I calculated.
Step-by-step explanation:
The area is measurement of the surface of a shape. To find the area of a rectangle or a square you need to multiply the length and the width of a rectangle or a square. Area, A, is x times y.
The perimeter is the length of the outline of a shape. To find the perimeter of a rectangle or square you have to add the lengths of all the four sides. x is in this case the length of the rectangle while y is the width of the rectangle. The area is measurement of the surface of a shape.
Answer:
x=18
Step-by-step explanation:
y²+y²=(9√(2))²
2y²=81*2
y²=162/2
y²=81
y=9
hypotenuse: 2y=x 2*9=18
x=18
Yes...this is linear because when graphed, makes a straight line