1)Follow order of operations to simplify the following expression:

5- __30_____

9 - 3 - (8 + 3)

2)Evaluate the expression using the values given for the variables.

yx + x2 + x; use x = -9, and y = 6

3)Simplify the expression.

5(7n - 10) - 10(4n - 2)

4)Simplify the expression and explain the answer as a fraction in lowest terms.

7 - (-1) +( 7)

5(8)

Use a proportion to set up and solve the following problem. Round your answer to the nearest tenth if necessary.

A 6.3 ft tall baby giraffe standing next to a tree stump casts a 24.6 ft shadow. If the tree stump casts a shadow that is 19.1 ft long, then how tall is it?