Answer:
0.67038
Explanation:
One z-value is negative and the other is positive.
This means we are looking for area between the two given z-values on opposite sides of the mean.
From z-table attached, the area at z = -2.31 is 0.98956
Also, from the second z-table attached, the area at z = 0.47 is 0.68082
But since we are looking for the area between both z-scores, we will now have;
P(-2.31 < x < 0.47) = (0.98956 + 0.68082) - 1
P(-2.31 < x < 0.47) = 0.67038
Answer:
-12
Explanation:
We are given information to solve for 2 variables x and y. To solve this I substituted 3x for y in the equation 5x - 4y = 21
So substituting gets us 5x - 4(3x) = 21
and we can solve the equation for x
5x - 12x = 21
-7x = 21
x = -3
Now that we have found x, we can find y simply by putting it in the equation y = 3x
y = 3(-3) = -9
Once we have both variables, we can find the answer to x + y
-3 + -9 = -3 - 9 = -12
So the answer to the question
x + y = -12
The statement "Heating chemicals is defined by the process of combustion" is false, combustion is a chemical reaction in which fuels combine with oxygen from the air to release heat.
<h3>What is combustion?</h3>
- It is a rapid oxidation process of certain fuel elements, that is, consisting mainly of hydrogen, carbon and sometimes sulfur.
- All combustion processes require the participation of an oxidant, mainly oxygen from the air.
- It is based on the exothermic chemical reaction of a substance or mixture of substances called fuel.
Therefore, we can conclude that a combustion process is a type of exothermic reaction that causes a rapid oxidation process therefore the statement "Heating chemicals is defined by the process of combustion" is false.
Learn more about the process of combustion here: brainly.com/question/17580726
High student loan payments can affect many decisions but not the decision of getting married.
<h3>What are the effects of high student loan payments?</h3>
High student loan payments mainly affect the money people have every month after paying the loan. This factor can affect money-related decisions such as:
- The money they can spend on food, housing, clothing, etc.
- The possibility of buying a house or a car.
- The amount of money they can save.
<h3>What life decisions are not affected?</h3>
Decisions that are not directly related to money such as getting married are not affected by high loan payments.
Note: This question is incomplete because the options are missing; here is the missing section:
a)getting married
b)buying a car
c)being able to afford food
d)buying a house
Learn more decisions in: brainly.com/question/14019418
