What is the algebraic expression of the sum of 3 coins and c coins

The Amazon River, one of the longest rivers in the world, is about 6,400 kilometers long, IF 1 mile equals 1.6 kilometers, what is the length of the Amazon River in miles?

In a tornado the wind velocity in meters per second can be described by the function v (p) = 12.3 sqrt 1134-3p where 'p' is th air pressure in millibars. What is the air pressure of a tornado in which the wind velocity is 49.3 meters per second?

g Suppose we have a simple random sample of 400 households drawn from a city with 40,000 households. A 95% confidence interval estimate for the population mean number of children per household is [1.1,2.3].

Which number is irrational a. 0.14 b.√6 c.√4 d. 1/3

What are three way that you can call a rhombus?

I'm thinking of a number. When you triple my number and subtract 8 you get 7. What is my number?

Is 100 a solution because it is much greater than 35. True or false

What is the formula to convert kilometers to miles?

Solve the following and make sure to write your answer in scientific notation. (1.5 x 105) (5 x 103)

the length of a rectangular parking lot at the airport is 2/3 is mile. if the area is 1/2 square mile, what is the width of the parking lot