Why don't parrallel lines cross

Markus is 5 feet 8 inches tall. He stands next to a tree on a sunny day and has a friend measure the length of his shadow and the tree's shadow. Markus's shadow is 8.5 feet long. The shadow of the tree is 39 feet long. How tall is the tree?

Find the surface area of the cylinder. 5 cm 8 cm

6. A hemispherical dome of a building needs to be painted. if the circumference of the base of the dome is 17.6 m, find the cost of painting it, given the cost of painting is Rs. 5 per 100 cm2

What is the value of the modulus of 2-6i? Answer as a simplified radical.

What is (10) (9 1/4) (1/5)

How to find the sum of the squares of the roots of an equation?

Manuela solved the equation below 2 (x+2) = x-4

C=-3. a=2 b=4 (2) 2 (3c+7)

1) x+3 - 5x + 7 + 4y

Amanda's computer weighs 56 ounces. how many pounds does it weigh?