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2 years ago

15

There are 500 seats on a plane flying to San Francisco. 20% of the seats are next to a window. How many of the seats are next to

a window?

1 answer:

Cloud [144]2 years ago

7 0

Answer: 100

500 Is 100%

500 ÷ 100 = 5

5 Is 1%

5 x 20 = 100

100 Is 20%

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The water level in an ocean bay changes at an average rate of 6 meters every 12 hours. How many meters does the ocean bay change

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Answer:

2 meters an haur

Step-by-step explanation:

12 haurs= 6 meters

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What is the prime factorization of 450

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2 years ago

2. A carpenter wants to cut a wood board that is feet long

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Answer:

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Step-by-step explanation:

divide 5/6 by 5/16 = 2 2/3 pieces

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2 years ago

What is the solution to the pair of simultaneous equations? 2x+y=5. 3x-2y=4

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Answer:

(2, 1)

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Distributive Property

Equality Properties

Multiplication Property of Equality
Division Property of Equality
Addition Property of Equality
Subtraction Property of Equality<u> </u>

<u>Algebra I</u>

Coordinates (x, y)
Terms/Coefficients
Solving systems of equations using substitution/elimination

Step-by-step explanation:

<u>Step 1: Define Systems</u>

2x + y = 5

3x - 2y = 4

<u>Step 2: Rewrite Systems</u>

<em>Manipulate 1st equation</em>

[Subtraction Property of Equality] Subtract 2x on both sides: y = 5 - 2x

<u>Step 3: Solve for </u><em><u>x</u></em>

<em>Substitution</em>

Substitute in <em>y</em> [2nd Equation]: 3x - 2(5 - 2x) = 4
[Distributive Property] Distribute -2: 3x - 10 + 4x = 4
[Addition] Combine like terms: 7x - 10 = 4
[Addition Property of Equality] Add 10 on both sides: 7x = 14
[Division Property of Equality] Divide 7 on both sides: x = 2

<u>Step 4: Solve for </u><em><u>y</u></em>

Substitute in <em>x</em> [Modified 1st Equation]: y = 5 - 2(2)
Multiply: y = 5 - 4
Subtract: y = 1

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3 years ago

faltersainse [42]

Anything less than 90, i hope this helps

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2 years ago