Answer:
55
Step-by-step explanation:
CBZ+ZBA=CBA
x=6
9(6)+1=55
Answer:
11x + 8 +8x +12 =27 (drop the parenthesis, there's no actual need for them)
19x +20 =27 (i combined like terms and then subtracted 20 from both sides)
19x = 7 (divide both sides by 19 to get x alone)
x= 7/19 or 0.36842105 (the answer)
Step-by-step explanation:
Answer:
And we can find this probability using the complement rule and with the normal standard table or excel:
Step-by-step explanation:
Previous concepts
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".
The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".
Solution to the problem
Let X the random variable that represent the average household spent of a population, and for this case we know the distribution for X is given by:
Where
and
We are interested on this probability
And the best way to solve this problem is using the normal standard distribution and the z score given by:
If we apply this formula to our probability we got this:
And we can find this probability using the complement rule and with the normal standard table or excel:
Answer:
w = -5
Step-by-step explanation:
Hello there!
9+7w-9=5w-10
Add 9 and -9 since we can add those
7w=5w-10
Use subtraction Prop of Equality (combining/simplifying like terms)
2w = -10
Now isolate the w by dividing 2w by 2 and use the division prop of equality
w = -5
Hope this helps. Feel free to comment for further explanation.
Answer:
x = 9
y = 4
Step-by-step explanation:
Substitution! View images attached ^^