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ra1l [238]
3 years ago
7

Without doing the compotation,explain why or why not 19.7 is a reasonable value for the expression 122.14 divided by 6.2

Mathematics
1 answer:
lisov135 [29]3 years ago
4 0

Rounding 122.14 to the nearest 10 and 6.2 to the nearest whole number gets us the values 120 and 6. Using these estimates for our division gives us the rough result 120 ÷ 6 = 20. 6.2 is a larger number than 6, so division by 6.2 will lower our result, but 122.14 is also bigger than 120, so this increase will raise our result a little as well. The net effect will make the actual quotient come out slightly lower than our estimate of 20, so 19.7 is a perfectly reasonable value.

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ludmilkaskok [199]

Answer:

x ≥ -1

Step-by-step explanation:

the red fully circle in -1 show that -1 is include

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4 years ago
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A rectangle has vertices located at (–4, 4), (2, 4), (2, –4) and (–4, –4). What is the length of a diagonal of the rectangle?
Allisa [31]

Answer:

A diagonal of this rectangle has length 10.

Step-by-step explanation:

The vertices (-4, 4) and (-4, -4) have the same x-coordinate (-4) and different y-coordinates (4 and -4).  These two points are the endpoints of a vertical side of the rectangle which has length 4 - (-4) = 8.

Similarly, the vertices (2, -4) and (-4, -4) have the same y-coordinate (-4) but different x-coordinates (2 and -4).  To find the horizontal dimension of the rectangle, we calculate 2 - (-4), which comes out to 6.

Thus, the width of the rectangle is 6 and the length is 8.

Using the Pythagorean Theorem, we find the length of a diagonal as follows:

d = √(6^2 + 8^2) = √(36 + 64) = √100 = 10.

A diagonal of this rectangle has length 10.

5 0
3 years ago
Please help me!!! Assignment due in an hour and I'm not even 1/2 done!!!!
Tomtit [17]

Answer:

x = -23

General Formulas and Concepts:

<u>Algebra II</u>

  • Exponential Rules

Step-by-step explanation:

<u>Step 1: Define</u>

125^{x+5} = 25^{x-4}

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

  1. Rewrite:                                        5^{3(x+5)} = 5^{2(x-4)}
  2. Define:                                          3(x+5) = 2(x-4)
  3. Distribute:                                     3x+15 = 2x-8
  4. Subtract 2x on both sides:          x+15 = -8
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3 years ago
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jeyben [28]

Answer:

4a)= 2.1m    4b)= 1.9 m    5)= 29.6º

Step-by-step explanation:

4a):

x is the opp

AB is the hyp

BC is the adj

thus,

sin32 = x/4

cross multiply, x= 4*sin32

x= 2.1196.......

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x is the hyp

ac is the opp

bc is the adj

thus,

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C= tan^-1 (2.1/3.7)

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Answer:

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Step-by-step explanation:

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Then we add and subtract from left to right

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3 years ago
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