Tina solved 15 hard puzzles.
We can use the system of equations:
X represents the easy puzzles
Y represents the hard puzzles
x+y=50
3x+6y=195 (I just divided everything by 10 to make things easier)
Then I multiplied the first equation by -3 to be able to cross out x and solve for y.
So now we have -3x-3y=-150.
Now we can add the equations together and we get:
-3x-3y=-150
3x+6y=195
+________
3y= 45
y=15.
That means that Tina solved 15 hard puzzles and 45 easy puzzles.
Hope this helps! (Plz thank)
The value of the limit expression 
is 9, and it means that the function approaches 9, as x approaches 3.
<h3>How to evaluate the limit?</h3>
The limit expression is given as:
This means that we determine the value of the function as x approaches 3.
So, we have:
Limit = √(3^2 + 7) + 5
Evaluate the square
Limit = √(9 + 7) + 5
Evaluate the sum
Limit = √16 + 5
Evaluate the square root
Limit = 4 + 5
Evaluate the sum
Limit = 9
Hence, the value of the limit is 9
Read more about limits at:
brainly.com/question/14143957
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Joining together two COMPLETE phrases.
When joining together two sentences with a conjunction, you would use a comma.
It wouldn't be used to describe a list or show that someone is stuttering.
I hope this helps!
~cupcake
A ti se te dañó el auto anoche.
The verb "dañar" implies the production of damage to a certain or determinable thing or person.
Thus, the sentence refers to damage that happened to the car of the person to whom the sentence refers. In addition, this damage occurred in the past tense, that is, on the night before the sentence is pronounced.
Learn more about Spanish in brainly.com/question/903988
Data is collected only once from a participant is not a characteristic of a longitudinal study. Thus, the correct option is A.
<h3>What is a Longitudinal study?</h3>
A Longitudinal study may be defined as a scientific approach to a specific research that involves recounted compliances of the duplicate variables over short or long periods of time.
A longitudinal study involves the collection of data from the same participants at different points in time, collection of data from a large sample size at the same time, and collection of data that can span over several years.
Therefore, the correct option for this question is A.
To learn more about Longitudinal study, refer to the link:
brainly.com/question/25681723
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