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erica [24]
3 years ago
9

Check whether these statements are wff or not:(a) (p˅q) ∧∼r

Mathematics
1 answer:
Free_Kalibri [48]3 years ago
4 0

Answer:

It is a well formed formula

Step-by-step explanation:

1 - p,q,r are well formed formulas.

2 - p \ \lor \ q  is a well formed formula as well.

3 - \neg r is a well formula as well

4 - (\ p \ \lor \ q) \ \land \ \neg r is a well formula as well.

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You are making a new type of deodorant from two different mixtures the first mixture is 30% smell proof and the second mixture i
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Answer:

600 L of 30% proof and 400 L of 80% proof is needed

Step-by-step explanation:

Let the amount of 30% smell proof be x while that of 80% smell proof is y

Then;

x + y = 1000 •••••(i)

Also;

30% of x + 80% of y = 50% of 1000

0.3x + 0.8y = 500 •••••(ii)

From i, x = 1000 - y

Put this into ii

0.3(1000-y) + 0.8y = 500

300 - 0.3y + 0.8y = 500

0.5y = 500-300

0.5y = 200

y = 200/0.5

y = 400 L

But x = 1000 - y

x = 1000 - 400 = 600 L

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2 years ago
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NNADVOKAT [17]

Answer:

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2 years ago
Choose the correct slope and y-intercept of the line indicated by this linear equation.
stellarik [79]
The correct answer is m=-2 (slope) and b=4 (y-intercept).
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3 years ago
Which of the following is a rational number (4 points) 15 ,16,21,22
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Read 2 more answers
For the 405 highway that car pass through a checkpoint, assume the speeds are normally distributed such that μ= 61 miles per hou
Strike441 [17]

Answer:

Z = 1

Step-by-step explanation:

Z - score

In a set with mean \mu and standard deviation \sigma, the zscore 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 pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 61, \sigma = 4

Calculate the Z value for the next car that passes through the checkpoint will be traveling slower than 65 miles per hour.

This is Z when X = 65. So

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

Z = \frac{65 - 61}{4}

Z = 1

4 0
3 years ago
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