Which math expression represents the phrase? 4 times the sum of a number and 9

a. 4 · n + 9

b. 4 · (n · 9)

c. 4 + (n + 9)

d. 4 · (n + 9)

Nicholas wrote the steps below to simplify the fraction 20/30. Find his error and correct 20/30 = 20/5=4 30/6 = 5

What are some different ways you could rewrite 32. y using the commutative property of multiplication

At the beginning of year 1 Lisa invests $500 at an annual compound interest rate of 3% she makes no deposits to or withdrawals from the account which explicit formula can be used to find the accounts's balance at the beginning of year 6 what is the

The roman empire was established in 509 B. C. and fell 985 years later. in what year did the empire fall?

Insert commas in the correct positions for the number3790241068

A certain type of bacteria, given a favorable growth medium, doubles in population every day. If you begin with 10 bacteria, how many days will it take for the population to reach 20,000

If you wanted to find the depth of a submarine during a dive, would it be more reasonable to use an equation with the rate in feet per minute or feet per hour? Explain your reasoning.

What value of satisfies the equation 2n-3 (4n+5) = -6 (n-3) - 1

A supplier has delivered 9 pallets of material to the hardware store. The delivery needs to be inventoried in 1.5 hours. How many pallets must be inventoried per hour?

Solve x for 3 х - 1 = - 13