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kow [346]
3 years ago
11

Please tell me, how do i solve percentages? And yes, i know there is more than one way. Please tell me the methods to solve all

the ways. Like, how to do 45% of 20 or; 85 is 60% of __, or those questions that include stuff like taxes and other complicated things. I am in 6th grade and i am afraid i am about to fail, since i havent been turning in my Google Classroom assignments. Please help, will reward brainliest :(
Mathematics
1 answer:
Bumek [7]3 years ago
5 0
I'll give a practice problem to help explain it a bit better.

Here, let's try to solve 45% of of 60.

First, we convert the percentage into a decimal. To turn any percentage into a decimal you move the point two spaces to the left.

That means 45% as a decimal is .45.

Next, we multiply our number, 60, by the decimal .45.

60×.45=27.

That means 45% of 60 is 27.

To sum it all up, you have to get the percentage, move the decimal point two spaces to the left, and multiply it by the number you were trying to find the percentage of.

Have a wonderful day! :)
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The rational expressionwrite this ratio in the form p(x) + x/(x - 2) Where is some x - 2
loris [4]

Answer:

\frac{2x^2+5x-14}{x-2}=(2x+9)+\frac{4}{x-2}

Step-by-step explanation:

Given rational expression is,

\frac{2x^2+5x-14}{x-2}

x - 2) 2x² + 5x - 14(2x + 9

         <u>2x² - 4x</u>

                  9x - 14

                  <u>9x - 18</u>

                          4

Therefore, \frac{2x^2+5x-14}{x-2}=(2x+9)+\frac{4}{x-2} is the answer.

6 0
2 years ago
Each story of a building is 14.3 feet tall. If the height of the building is 185.9 feet, how many floors does the building have?
zvonat [6]

Answer:

D 13

Step-by-step explanation:

To find out how many floors the building has, we take the height of the building and divide by the size of each floor

floors = 185.9 ft / 14.3ft per floor

           = 13 floors

3 0
3 years ago
Read 2 more answers
Okay so I'm working on solving equations<br><img src="https://tex.z-dn.net/?f=%20-%2015x%20%2B%205%20%3D%20%20-%2010x%20%2B%2025
Ksenya-84 [330]

Answer:

x = -4

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

Equality Properties

Step-by-step explanation:

<u>Step 1: Define</u>

-15x + 5 = -10x + 25

<u>Step 2: Solve for </u><em><u>x</u></em>

  1. Add 15x on both sides:                    5 = 5x + 25
  2. Subtract 25 on both sides:              -20 = 5x
  3. Divide 5 on both sides:                   -4 = x
  4. Rewrite:                                             x = -4
8 0
2 years ago
What error did zacharias make? the –5 should be 5. the 52 should be –52. the 2 in the numerator should be –2. the 2 in the denom
Contact [7]

The error made by zacharias in solving the quadratic equation 0 = -2x² + 5x - 3 using quadratic formula is; the 2 in the numerator should be –2.

<h3>Quadratic equation</h3>

There are four methods of solving quadratic equation. Namely;

  • Factorization method
  • Completing the square method
  • Graphical method
  • Formula method

0 = -2x² + 5x - 3

  • Using quadratic formula

x = -b ± √b² - 4ac / 2a

where,

  • a = -2
  • b = 5
  • c = -3

x = -b ± √b² - 4ac / 2a

x = -5 ± √5² - 4(-2)(-3) / 2(-2)

= -5 ± √25 - (24) / -2

= -5 ± √1 / -2

= -5/2 ± 1/2

= -5/2 - 1/2 or x = -5/2 + 1/2

= -5-1 / 2 or -5+1/ 2

x = -6/2 or -4/2

x = -3 or -2

Therefore, the solution to the quadratic equation is x = -3 or -2

Learn more about quadratic equation:

brainly.com/question/1214333

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6 0
1 year ago
What angles are they ​
Doss [256]

Answer:

option d. vertical opposite angle

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