Solve the system of equations using Gaussian Elimination method.

x + y + z - t = 4

2x - y + 2z + 3t = - 8

-x + 2y - 3z + t = 4

3x + y + 2z - 3t = 9

Which scatterplot suggest a linear relationship between x and y

Write an expression for the calculation divide 15 into thirdsand subtract from 14 divided in half

The length of a rectangle is 3 cm greater than its width. The perimeter is 24 cm. Find the dimensions of the rectangle.

Dan has 20 books in his library. He bought several books at a yard sale over the weekend. He now has 71 books in his library. How many books did he buy at the yard sale?

Andy enters in a futures contract allowing him to sell 5,000 troy ounces of gold at $1,000 per ounce in 36 months. After that time passes, the market price of gold is $950 per troy ounce. How much did Andy make or lose? Choose one.

Circular gears P and Q start rotating at the same time at constant speeds. Gear P makes 10 revolutions per minute and Gear Q makes 40 revolutions per minute.

A triangle with vertices (0, 1), (4, 1), and (1, 5) is reflected across the x-axis. What are the new vertices of the reflected triangle?

Using only whole numbers Nikki wrote as many multiplication equations as she could with 12 as the product what where her equations

The price of an item is $12.25. You give the cashier a $10 and a $5 bill. What is the change?

In a group of 50 people 28% of them has flue shots done. What is the probability to choose from this group 15 people that didn't have flue shot.