First turn each denominator into a number they all have in common. And then do blank times blank to numerator and denominator to all of them and just add them all up
= a^3 +3a^2-7a+4a^2+12a-28
=a^3 +7a^2+5a-28
9514 1404 393
Answer:
correct as marked (145°)
Step-by-step explanation:
Angles ABC and DBE are "vertical" angles. As such, they are congruent.
∠ABC = ∠DBE = 145°
Help is when you are needed of someone to help you
Answer:
We want to find the percentage of values between 147700 and 152300

And one way to solve this is use a formula called z score in order to find the number of deviations from the mean for the limits given:

And replacing we got:


So then we are within 1 deviation from the mean so then we can conclude that the percentage of values between $147,700 and $152,300 is 68%
Step-by-step explanation:
We define the random variable representing the prices of a certain model as X and the distirbution for this random variable is given by:

The empirical rule states that within one deviation from the mean we have 68% of the data, within 2 deviations from the mean we have 95% and within 3 deviations 99.7 % of the data.
We want to find the percentage of values between 147700 and 152300

And one way to solve this is use a formula called z score in order to find the number of deviations from the mean for the limits given:

And replacing we got:


So then we are within 1 deviation from the mean so then we can conclude that the percentage of values between $147,700 and $152,300 is 68%