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3 years ago

Find the square root of -36

Mathematics

2 answers:

My name is Ann [436]3 years ago

6 0

The square root is 6i and the i is there because there is a negative sign

dimulka [17.4K]3 years ago

5 0

$i=\sqrt{-1}-\text{the imaginary number}\\\\\sqrt{-36}=\sqrt{(36)(-1)}=\sqrt{36}\cdot\sqrt{-1}=\boxed{6i}$

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What is 2,798 divided by 20

Sholpan [36]

2798 divided by 20 equals 139.9

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3 years ago

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tankabanditka [31]

% spent on books = 456/2400 × 100%
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3 years ago

Please help meeeeeeeeeeeee directions: use substitution to solve the solution

dimaraw [331]

Answer:

(-3, 13)

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Equality Properties

Multiplication Property of Equality
Division Property of Equality
Addition Property of Equality
Subtraction Property of Equality

Algebra I

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

Step-by-step explanation:

Step 1: Define Systems

y = -4x + 1

11y = x + 146

Step 2: Solve for x

Substitution

Substitute in y: 11(-4x + 1) = x + 146
Distribute 11: -44x + 11 = x + 146
[Addition Property of Equality] Add 44x on both sides: 11 = 45x + 146
[Subtraction Property of Equality] Subtract 146 on both sides: -135 = 45x
[Division Property of Equality] Divide 45 on both sides: -3 = x
Rewrite/Rearrange: x = -3

Step 3: Solve for y

Define original equation: y = -4x + 1
Substitute in x: y = -4(-3) + 1
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Add: y = 13

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3 years ago

What single percentage change is equivalent to a 15% decrease followed by a 16% decrease?

Tomtit [17]

Answer:

Decrease of 28.6%.

Step-by-step explanation:

The multiplier for a increase of a% is 1 + a/100.

The multiplier for a decrease of b% is 1 - b/100.

Decrease of 15%

1 - 15/100 = 1 - 0.15 = 0.85

Decrease of 16%

1 - 16/100 = 1 - 0.16 = 0.84

Both:

0.85*0.84 = 0.714

Change:

The initial percentage is 100% = 1.

0.714 - 1 = -0.286

Negative, so a decrease

The answer is a decrease of 28.6%.

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3 years ago

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yaroslaw [1]

Answer:

divide 150 by 12 ( because there are 12 inches in one foot) and your answer would be 12.5 feet.

Step-by-step explanation:

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4 years ago

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