Solve the system of equations using matrices. Use Gaussian-Jordan elimination.

6) 7x - y + 2z = 21

9x - 3z = 0

3y + z = 21

Question 7 the length of a shadow of a building is 29 m. the distance from the top of the building to the tip of the shadow is 38 m. find the height of the building. if necessary, round your answer to the nearest tenth.

Pierce drove to Allentown to baker, averaging 55 miles per hour. His journey back to Allentown using the same route took 3 hours longer because he averaged only 40 miles per hour.

How do you round off 89,659 to the nearest 100,000

Answer to 3+2 + (5-1) + 5=

Two numbers total 59 and have a difference of 23. Find the two numbers

Determine whether the graph is discrete or continuous. Explain your reasoning. "the number of completed passes depends on the number of attempted passes"

How to make an exponential model from a table

Each day, a factory produces a total of 280 containers of ice cream. The flavors are vanilla, chocolate, and strawberry.

If a wood floor costs $4.50 per square foot, how much is that per square yard?

Show FSS Find the area of the remaining pizza if the radius 10 centimeters.