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Maslowich
4 years ago
14

The average of four numbers is 98. If three of the numbers are 86,87,and 91 what is the fourth number?

Mathematics
1 answer:
timurjin [86]4 years ago
7 0
To find the average, you have to add all the numbers up and then divide by the amount of numbers you added together.

Equation: (86+87+91+x)/4=98
Solve for x:
86+87+91+x=98*4
264+x=392
x=392-264
x=128

The fourth number is 128
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4. What value of x makes the inequality true?<br> 3(2x - 1) - 11x S -3x + 5
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Step-by-step explanation:

<u>Step 1: Define</u>

<em>Identify</em>

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

  1. [Distributive Property Distribute 3:                                                                  6x - 3 - 11x ≤ -3x + 5
  2. [Subtraction] Combine like terms:                                                                   -5x - 3 ≤ -3x + 5
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  4. [Subtraction Property of Equality] Subtract 5 on both sides:                        -8 ≤ 2x
  5. [Division Property of Equality] Divide 2 on both sides:                                  -4 ≤ x
  6. Rewrite:                                                                                                             x ≥ -4
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3 years ago
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Hello from MrBillDoesMath!

Answer:

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