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xxTIMURxx [149]
3 years ago
7

Perform the indicated operation. 8/a - 6/a + 7/a

Mathematics
1 answer:
Jlenok [28]3 years ago
3 0

Answer:

9/a

Step-by-step explanation:

8/a - 6/a + 7/a

Since the denominators are the same, we can add the numerators

8-6+7 =9

Then put it over the common denominator a

9/a

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The mean for a data set is 60. The Z-score for
Vladimir [108]

Answer:

D. a = 60 and b = 58.8

Step-by-step explanation:

Z-score:

In a set with mean \mu and standard deviation \sigma, the z-score of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

Z-score for data point a is 0.

This means that a is the mean, that is, a = 60.

The z-score for data point b is -0.4.

This means that b must be a value below the mean, that is, a value below 60.

The option that satisfies a = 60 and b < 60 is option D, which is the answer.

7 0
2 years ago
Istanbuldaki marmaray hattında tren maksimum 100km/sa'tir Trenin saniyedeki hızı kaç m/sn'dir​
Tanzania [10]

Answer:

27,77

1 saatte 3600 saniye var

100 km de 100.000 metre yapar o halde

100.000/3600 = 27,77 m/sn yapar

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7 0
3 years ago
The hourly wages for employees at a hardware store are shown. ​
NemiM [27]

Answer:

do you have a picture

Step-by-step explanation:

instructions uncleat

8 0
3 years ago
$30 before tax <br> discount 20% tax 6.4% <br> tip 15%
jeyben [28]

Answer: $30.44

Step-by-step explanation:

$30 20% of tht is 6

30-6=24

tax is 6.4% which is 1.94

24+1.94 which equals $25.94

tips is 15% 4.5 so we add that to $25.94

 so total is $30.44

4 0
2 years ago
Read 2 more answers
A student used a compass and a straightedge to construct <img src="https://tex.z-dn.net/?f=%5Coverline%7BCE%7D" id="TexFormula1"
Luba_88 [7]

Answer:

2) ∠ACE ≅ ∠BCE

Step-by-step explanation:

Considering the complete question attached in Figure below, geometry shows that ∠ACB is bisected into two angles ∠ACE and ∠BCE and we know that bisection means to divide an angle into two equal angles. According to this the resultant angles ∠ACE and ∠BCE must be equal and congruent.

7 0
3 years ago
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