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marissa [1.9K]
3 years ago
5

A publisher prints 1912 copies of a book in each print run.If they print 305 runs,the manager wants to know about how many books

will be printed. What is a reasonable estimate?
Mathematics
1 answer:
sineoko [7]3 years ago
3 0

Answer:

A reasonable estimate is [tex]1,900 * 300 = 570,000[tex]

Step-by-step explanation:

This is because 1,900 is the closest multiple of 100 for 1,912, and 300 is the closest multiple of 100 for 305. And [tex]1,900 * 300[tex] is [tex]19 * 3 * 10,000[tex].

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What is the missing value in the proportion 4/5 = x/30?
ra1l [238]

Answer:

\displaystyle x = 24

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
  • Subtraction Property of Equality<u> </u>

Step-by-step explanation:

<u>Step 1: Define</u>

<u />\displaystyle \frac{4}{5} = \frac{x}{30}<u />

<u />

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

  1. [Multiplication Property of Equality] Cross-multiply:                                      \displaystyle 5x = 120
  2. [Division Property of Equality] Divide 5 on both sides:                                \displaystyle x = 24
4 0
3 years ago
Haley is twice as old as Riley. The sum of their ages is 39. Write an equation that represents (x) , Riley's age.
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Answer:

X=39×2. Answer: 39×2= 78

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