What's the Estimate of 615-342

I don't know the answer to this question 5286-k=4319 k=?

Nina has B coins. Clayton has 4 fewer coines than 6 times the number of coins Nina has. Write a simplified expression for the total number of coins.

The combined yearly interest for x dollars invested at 13% and 20,000-x dollars invested at 8% is

Given the function f (x) = 2|x+6|-4 for what values of x is f (x) = 6

A certain bacteria is growing at a rate of 4 percent each day. If the culture of bacteria has 5,000 bacteria today, how many bacteria will be present 10 days from now?

The equilateral triangle shown is rotated about line a. Each side of the triangle measures 20 mm. What shape is created by the rotation and what is the approximate circumference of the base? Circumference of a circle: C = 2πr

How many ways can you add 3 non-negative integers so the sum is less than 10?

The minimum level of inventory needed to meet customer demand is called the

Find the surface Area of 2,3,4

35, 32, 29, 26 find common difference