Factor 36+12x+x^2 as the product of two binomials
1 answer:
You might be interested in
Answer:
a)
b)
Step-by-step explanation:
a)
Assume that r is a regular price before discount and tax
Including discount, we substract 5 from r. We get (r-5).
Then, we include tax by adding 5% value of (r-5)
Including a tax we may realize by multiplying initial value (r-5) by 1.05, where an ending .05 is percentage value of a tax
b)
in a formula we substitute r=15.50 and calculate the value on the right side of the sign "=".
You solve it too, using a calculator.
If you push the following buttons:
1 5 . 5 0 - 5 = + 5 %
you should get a result 11.025, after approximation to the 2 digits after comma there is 11.03
Answer:
Step-by-step explanation:
a. Given that the mean is 28 and the standard deviation is 2.4.
Let X be the score of our random selection.
-The z-score is calculated using the formula:
-The probability that the score is greater than 30.4 is calculated as:
Hence, the probability of a random score being greater than 30.4 is 0.1587
b. The probability that a randomly selected score is less than 32.8:
Mean=28, sd=2.4 and X=32.8
Hence, the probability that a random selection has a score less than 32.8 is 0.9773
c. The probability that a randomly selected score is between 25.6 and 32.8:
mean=28, sd=2.4 X=25.6, 32.8
Hence, the probability of the score being between 25.6 and 32.8 is 0.8186