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3 years ago

Find the value of x

Mathematics

1 answer:

anastassius [24]3 years ago

4 0

It would be 67 because its the same decrease as the other.

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How to get 2|5 of 84.78

Elza [17]

You can see 84.78 as $\frac{84.78}{1}$ .

So, you can see the problem as $\frac{84.78}{1} * \frac{2}{5}$

First, multiply all the numerators together and all the denominators together.

You end up with $\frac{169.56}{5}$

=33.912

4 0

3 years ago

For what values of N will the product 3n be less than 50

Butoxors [25]

3n<50

n<50/3

The variable N represents a whole number.
For what values of n will the sum of n+3 be less than 50?

6 0

3 years ago

Read 2 more answers

Complete the following two-column proof. Given: 5x - 2 = -12 Prove: x = -2

kolezko [41]

Answer:

I really don't know! Hope you have a good grade :)

Step-by-step explanation:

5 0

3 years ago

Help I cannot figure this question out.

netineya [11]

Answer:

B. x = -1 ± i

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

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

Algebra II

Imaginary Numbers: √-1 = i

Step-by-step explanation:

Step 1: Define

x² + 2x = -2

Step 2: Identify Variables

Rewrite Quadratic in Standard Form [Addition Property of Equality]: x² + 2x + 2 = 0
Break up Quadratic: a = 1, b = 2, c = 2

Step 3: Solve for x

Substitute in variables [Quadratic Formula]: $\displaystyle x=\frac{-2 \pm \sqrt{2^2-4(1)(2)}}{2(1)}$
[√Radical] Evaluate exponents: $\displaystyle x=\frac{-2 \pm \sqrt{4-4(1)(2)}}{2(1)}$
Multiply: $\displaystyle x=\frac{-2 \pm \sqrt{4-8}}{2}$
[√Radical] Subtract: $\displaystyle x=\frac{-2 \pm \sqrt{-4}}{2}$
[√Radical] Factor: $\displaystyle x=\frac{-2 \pm \sqrt{-1}\sqrt{4}}{2}$
[√Radicals] Simplify: $\displaystyle x=\frac{-2 \pm 2i}{2}$
Factor: $\displaystyle x=\frac{2(-1 \pm i)}{2}$
Divide: $\displaystyle x = -1 \pm i$