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Bumek [7]
3 years ago
12

Your friend says "Multiplying a number by 5 is a 500% increase" Describe and correct the error in your friend's reasoning.

Mathematics
1 answer:
telo118 [61]3 years ago
7 0
An increase is adding, not multiplying. they meant that 5 times a number is 500% of something. it would be a 400% increase as one plus four is five.
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Divide £30 between 2 people in the ratio 1:2
yuradex [85]
1+2=3.
30/3=10
10x1=10
10x2=20
So the answer would be £10:£20
And to check if it’s right £10 + £20= £30
3 0
4 years ago
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50 points please help me
skelet666 [1.2K]

Answer:

0

Step-by-step explanation:

The slope of the line is 0 as it is parallel to x-axis.

Slope = (y2 - y1)/(x2 - x1)

= (2-2)/(4-(-2))

= 0

8 0
2 years ago
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What is the solution to 0.4(12 – 3x) = 0.3(12x – 16)?
TiliK225 [7]

Answer:

x = 2

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

  • Multiplication Property of Equality
  • Division Property of Equality
  • Addition Property of Equality
  • Subtract Property of Equality

Step-by-step explanation:

<u>Step 1: Define</u>

0.4(12 - 3x) = 0.3(12x - 16)

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

  1. Distribute:                                4.8 - 1.2x = 3.6x - 4.8
  2. Add 1.2x on both sides:          4.8 = 4.8x - 4.8
  3. Add 4.8 on both sides:           9.6 = 4.8x
  4. Divide 4.8 on both sides:       2 = x
  5. Rewrite:                                   x = 2
8 0
3 years ago
Write the equation of the line fully simplified slope-intercept form.
inessss [21]
Pick any two points
(0, 3), (-1,9)
Find slope (y2-y1)/(x2-x1)
(9-3)/(-1-0) = 6/-1 = -6
Y = -6x + b
Plug in a point
3 = 0 + b, b= 3
Final equation: y = -6x + 3
5 0
3 years ago
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The area of one triangle is 150 square centimeters when it's height is 20 centimeters and it's base length is 15 centimeters. Wh
Anna007 [38]
Formula for finding the area of a triangle: A = \frac{1}{2}bh
Where b is the base and h is the height.

Substitute the variables for the values.

A = \frac{1}{2}(30)(18)
A = \frac{1}{2}540
A = 270

So, the area is 270 square centimeters.


3 0
3 years ago
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