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Iteru [2.4K]
3 years ago
13

Estimate the sum of the decimals below by rounding each summand to the

Mathematics
1 answer:
Dimas [21]3 years ago
7 0

Answer:

18

Step-by-step explanation:

8.355 rounds to 8

1.533 rounds to 2

8.260 rounds to 8

8 + 2 + 8 = 18

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55% as a fraction in simplest form.
nirvana33 [79]
Answer: 11/20
55/100 simplified is 11/20
3 0
3 years ago
What is the solution to 4 x + 6 less-than-or-equal-to 18?
DerKrebs [107]

Answer:

Answer

4.0/5

58



amna04352

Genius

6.9K answers

39.6M people helped

Answer:

x-less than-or-equal-to 3

Step-by-step explanation:

4x + 6 < 18 (less than or equal to)

4x < 12 (less than or equal to) x < 3 (less than or equal to)

5 0
3 years ago
X to the power of 2 subtract 3x for x=4
Helen [10]
First, X^2 while x is 4 =4^2, which is 4x4, which is 16 
3X while x is 4 is 12. 16-12=4. So the answer is 4
6 0
2 years ago
Find the geometric sum 4 + 12 + 36 + . . . + 236,196.
Zolol [24]
The answer choices are sufficiently far apart that you can work this backward. The sum will be ...
  236,196*(1 + 1/3 + 1/9 + 1/27 + ...)
so a reasonable estimate can be given by an infinite series with a common ratio of 1/3. That sum is
  236,196*(1/(1 - 1/3)) = 236,196*(3/2)

Without doing any detailed calculation, you know the best answer choice is ...
  354,292


_____
There are log(236196/4)/log(3) + 1 = 11 terms* in the series, so the sum will be found to be 4(3^11 -1)/(3-1) = 2*(3^11-1) = 354,292.

Using the above approach (working backward from the last term), the sum will be 236,196*(1-(1/3)^11)/(1-(1/3)) = 236,196*1.49999153246 = 354,292

___
* If you just compute log(236196/4)/log(3) = 10 terms, then your sum comes out 118,096--a tempting choice. However, you must realize that the last term is larger than this, so this will not be the sum. (In fact, the sum is this value added to the last term.)
3 0
3 years ago
Line j is parallel to line k. Find the m
Rufina [12.5K]

Answer:

- 8.14 = m = slope

Step-by-step explanation:

We know from the diagram that  8x-7  + 5x+18  = 180    so x = 13

  so 8x -7  =  97

slope = tan 97 = -8.14

8 0
2 years ago
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