(2y-5)(5y+7) answer this quickly lol

Mathematics

2 answers:

Stolb23 [73]3 years ago

8 0

Well this is a little tricky.. But my guess would be: <span>y = (-1.4, 2.5)</span>

kirza4 [7]3 years ago

7 0

What you need to do to solve this problem is by using the FOIL Method (First, Outside, Inside, and Last) Here are the steps into doing this problem.
Given Answer: (2y-5)(5y-7)
Next, you multiply by the order that has been given: 10y^2 + 14y -25y - 35
After you got the numbers and coefficients, you can combine like terms if necessary: 10y^2 - 11y - 35
Therefore, your answer should be 10y squared - 11y - 35.
I hope this helps. :)

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A bowling leagues mean score is 197 with a standard deviation of 12. The scores are normally distributed. What is the probabilit

Bond [772]

Answer:

0.281 = 28.1% probability a given player averaged less than 190.

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

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.

A bowling leagues mean score is 197 with a standard deviation of 12.

This means that $\mu = 197, \sigma = 12$