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3 years ago

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

Readme [11.4K]

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

Find x (btw if you answer this randomly just to get the point I'm reporting ur acc

NNADVOKAT [17]

Answer:

3.5 times 2 equals 7 so try 2.5 times 2 which would be 5, 5 could be the answer but im not sure :)

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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

yulyashka [42]

16 is the rational number, hope this is helpful

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3 years ago

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