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1 year ago

Help me out with this math problem for 50 points!!!

Mathematics

2 answers:

belka [17]1 year ago

6 0

1. 25% of 8$ is 2$, so dividing 16 and 2, it takes 8 weeks for 16 dollars

2. 400 is 80% of what number?, y=400x100/80
Y= 500

lisov135 [29]1 year ago

5 0

8 weeks is the correct anwser

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Artemon [7]

Answer:

$x=\pm2i\sqrt{5}$

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Algebra I

Standard Form: ax² + bx + c = 0
Quadratic Formula: $x=\frac{-b\pm\sqrt{b^2-4ac} }{2a}$

Algebra II

Imaginary Numbers: √-1 = i

Step-by-step explanation:

Step 1: Define Equation

x² + 20 = 0

Step 2: Identify Variables

a = 1

b = 0

c = 20

Step 3: Find roots x

Substitute: $x=\frac{-0\pm\sqrt{0^2-4(1)(20)} }{2(1)}$
Exponents: $x=\frac{-0\pm\sqrt{0-4(1)(20)} }{2(1)}$
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Subtract: $x=\frac{\pm\sqrt{-80} }{2}$
Factor: $x=\frac{\pm\sqrt{-1} \sqrt{80} }{2}$
Simplify: $x=\frac{\pm4i\sqrt{5} }{2}$
Divide: $x=\pm2i\sqrt{5}$

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2 years ago

What is the area of a house with 3 rooms and each room is 4 by 9

Olegator [25]

Answer:

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Step-by-step explanation:

4*9 = 36

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3 0

3 years ago

Read 2 more answers

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Firdavs [7]

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