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3 years ago

12

I need help. A building with a height of 48 m casts a shadow that is 30 m long. A person standing next to the building casts a s

hadow that is 0.8 m long. How tall is the person?

1 answer:

lutik1710 [3]3 years ago

8 0

Answer:

1.28 m

Step-by-step explanation:

48/30 = x/.8

cross multiply

30x = 48(.8)

30x = 38.4

x = 38.4/30

x = 1.28 m

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What is the slope of the line that passes through the pair of points (-1, 4), (3,12)

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Answer:

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General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right<u> </u>

<u>Algebra I</u>

Coordinates (x, y)
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Step-by-step explanation:

<u>Step 1: Define</u>

<em>Identify</em>

Point (-1, 4)

Point (3, 12)

<u>Step 2: Find slope </u><em><u>m</u></em>

Simply plug in the 2 coordinates into the slope formula to find slope <em>m</em>

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Answer:

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Explanation

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y = 3x + 2

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Solving both equations will yield the values of x and y;

Solution:

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y = -2x - 8 ------ (ii)

Using substitution method, input equation i, into ii

3x + 2 = -2x - 8

Collect like terms and solve;

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Then put x = -2 into i, to find y

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