explain why parentheses are needed. (2x)3 , (a +2)4, y(-x)z,

(Solution: because the parentheses determine the order of calculation.)

determine which expresion is to be raised to the fifth power. (-x)2,-(xy)5,(-xy)z5,(4-x)5, (-xy)5, x5/y

(Solution:(-xy)5  )

write the following phrases as algebraic expressions. Remember to place parentheses when needed. do not simplify -n subtract from m, the oroduct of -a and - b, -n divided by -m, the sum of x,p and y, b/a raised to the tenth power, 2ab squared, the opposite of -2a/7, the opposite of -2a/-7,

Solution: -n-m, (-a)(-b), (-n)/(-m), x+p+y,(b/a)^10, (2ab)^2, -(-2a/7),-(-2a/-7)

use the letter x to represent a number and write the following phrases as algebraic expressions. do not simplify, on eight of a number,

a nimber multiply by -3: x(-3)

a number subtracted fron -3: x-(-3)

the product of AB and a number. give anser in algebraic form: ABx

John has x dollars in his bank account. how much money will John have in the bank, after he withdrwas $100? (Answer: x-1000)

John's salary is x dollars. He got a new job and his salary doubled. How much money does John earn in his nwe job? (Answer: 2x)

if a family has x children, and the each of those children has 3 children of his own, how many grandchilren are there? (Answer: 3x)

Let t be a variable on a given day.Use the variable to write the following statement as an algebraic expression. The temperature on the given day increased by 5 degrees.(Answer: t+5)

The temperature on the given day decreased by 5 degrees(Answer: t-5)