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2 years ago

X+4y=-4, x+10y=-16, solve using systems of equations, elimination

Mathematics

1 answer:

lora16 [44]2 years ago

6 0

Answer:

x = 4

y = -2

Step-by-step explanation:

x + 10y = -16

-x -4y = 4 <-- ( multiplied x+4y=-4 with -1 so the x's cancel)

6y = -12

y = -2

put -2 back in the equation to get x

x + 10y = -16

x -20 = -16

x = 4

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Answer:

<u>The model is 64.62 inches of height or 5.39 feet</u>

Step-by-step explanation:

1. Let's review the information given to us to answer the question correctly:

Height of the Willis Tower in Chicago = 1,454 feet

Scale of the model = 2 inches : 45 feet height

2. How tall is the height?

For answering that question, we will use the following expression:

Height of the model = Height of the Willis Tower in Chicago/Scale in feet * Scale in inches

Replacing with the real values, we have:

Height of the model = 1,454/45 *2

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