Quiz 1 Investigating Linear Algebra & Matrices

Which graph shows the solution to the following system of inequalities?

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CCSS.HSA.REI.D.12

A farm has an area of 50 hectares (Ha). It is to be planted with tomatoes and potatoes. At most $8000 can be spent on planting. The planting cost for potatoes is $100/Ha and for tomatoes $200/Ha. Choose the graph that best shows the area of each crop that can be planted.

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CCSS.HSA.REI.D.12

What are the dimensions of the matrix associated with this table?

• 3 x 4

• 4 x 4

• 4 x 3

• 4 x 5

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CCSS.HSN.VM.C.6

Which matrix below represents a 2 x 2 identity matrix?

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CCSS.HSN.VM.C.10

The following matric represents the clothing inventory of a school bookstore. How many large sweaters does the bookstore have in stock?

• 285

• 65

• 550

• 175

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CCSS.HSN.VM.C.6

You own a store that sells small appliances. The matrix below shows the revenue, expenses, and profit for the first three months of the year. What is the entry in the second row and third column? What does this number represent?

• $82,528

  February's revenue

• $64,371

  February's expenses

• $18,211

  February's profit

• $85,422

  March's expenses

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CCSS.HSN.VM.C.6

Simplify.

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CCSS.HSN.VM.C.7

Matrix A represents the cost if he cars a used car dealer has on inventory ay the start of the month. Matric B represents the cost of the cars the same dealer has on inventory at the start of the next month. If the dealer has not added cars to his inventory, which matrix represents the costs the dealer has recovered over the month?

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CCSS.HSN.VM.C.6

The matrix below shows employees' hourly wage rates at a convenience store. The wage rates depend upon the type of job and the years of experience. The store is giving $0.35 raises to all stickers, $0.40 raises to all cashiers, and $0.50 to all service clerks. Write a matrix that can be added to the matric below to find the new wage rates after raises are given.

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CCSS.HSN.VM.C.6