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Fantom [35]
3 years ago
11

Which property is illustrated by the following? a + 4 = a + 4

Mathematics
2 answers:
iogann1982 [59]3 years ago
8 0

Answer: communitive

Step-by-step explanation:

The opposite sides have the same equations

neonofarm [45]3 years ago
8 0

Answer:

4

Step-by-step explanation:

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What is 66 rounded to nearest hundredth
Alchen [17]
Welp, looking at the number: 66

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The second digit "6" is up to or more than 5.

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So, we can clearly round it up.

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In this case, we are rounding to the nearest hundredth.

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Hm, 100 is pretty close to 66. 

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We can now say that the nearest hundredth is 100.

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BAM! *drops mic*
4 0
3 years ago
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use the angle diagram to solve for x and y. state the angle relationships used to write your equations. show all work when solvi
dlinn [17]

Answer:

X=20

Y=85

Step-by-step explanation:

6x-25=4x+15

2x=40

x=20

6(20)-25

120-25

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360-190

170

2y=170

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8 0
3 years ago
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Explain how you can use compatible numbers to estimate the whole-number quotient of 925÷29.​
alukav5142 [94]

Answer:

below

Step-by-step explanation:

Round 925 to 900

Round 29 to 30

900/30

= 30

Answer to 925/29:

31.89

7 0
2 years ago
I need help.............​
amid [387]
I didn’t know which problem you specifically needed help with, but I hope this helps.

7 0
3 years ago
Estimate the following quantities without using a calculator. Then find a more precise result, using a calculator if necessary.
zubka84 [21]

Explanation:

a. It is so easy to double a number that no approximation is necessary.

  31,000 × 200 = 3.1×10⁴ × 2×10² = 6.2×10⁶ exactly

__

b. 6.2×10³ × 5.2×10⁶ ≈ 6×5×10⁹ = 3×10¹⁰ approximately

The approximation can be refined a bit by taking the ".2" into account:

  6.2×10³ × 5.2×10⁶ ≈ (6×5 + .2×(6+5))×10⁹

  = 32.2×10⁹ = 3.22×10¹⁰ approximately

Actual product: 3.224×10¹⁰.

For most purposes, the approximation is an adequate approximation, as it it within 10% of the actual value.

__

c. 9×10⁶ -2.3×10⁴ ≈ 9×10⁶ approximately

A better approximation is to actually subtract an approximation of the smaller number:

  9×10⁶ -2.3×10⁴ ≈ (9 - 0.02)×10⁶ ≈ 8.98×10⁶ approximately

The actual value uses all of the digits of the smaller number:

  9×10⁶ -2.3×10⁴ ≈ (9 - 0.023)×10⁶ = 8.977×10⁶ exactly

As in part B, either approximation is adequate for most purposes, as the difference from the actual value is less than .3%.

_____

The accuracy required of an approximation, hence the work you expend improving accuracy, should depend on the need in the final application of the number. Often, approximations are used for budget or resource planning purposes where some "slop" is allowed or even expected.

They can also be used in engineering applications, where the error needs to be on the side of more safety (rather than less).

7 0
3 years ago
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