Answer: There are 20 students and 4 students are not here today.
Step-by-step explanation:
If the number of students = 4
Let the number of students be 'x'.
Fraction of students absent = 
If the number of students = 5
Fraction of students absent = 
And Jen came back,
So, the fraction of student absent is also written as

According to question, it becomes,

Hence, there are 20 students in our school.
And number of students are not here today is 
Answer:
The final answer is 16.
Gd luck with your work! :)
The unit of time that will make the statement true is "day"
<h3>What unit of time will make the statement true?</h3>
The conversion equation is given as:
Seconds + Seconds/? * day = seconds
Represent the blank with a variable (x)
So, we have:
Seconds + Seconds/x * day = seconds
Subtract "seconds" from both sides of the equation
So, we have:
Seconds/x * day = seconds
Divide both sides of the equation by "seconds"
So, we have:
1/x * day = 1
Multiply both sides by x
x= day
Hence, the unit of time that will make the statement true is "day"
Read more about time at:
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Solution:
Given:

To determine if an ordered pair is a solution, we substitute the x and y-values into the inequality and check if it is true.
Thus,




Therefore, the correct answers are selected as shown below;
The ratios of sin x° and cos y° are 15/8.
We have given that,
Use the image below to answer the following question.
We have to determine to find the value of sin x° and cos y°.
By applying Pythagoras theorem in the triangle given in the picture,
<h3>What is
the Pythagoras theorem?</h3>
(Hypotenuse)² = (leg 1)² + (leg 2)²
PO² = (15)² + 8²
PO² = 225 + 64
PO = √289
PO = 17
By applying the sine rule in the given triangle,
sin(x°) = Opposie side/hypotenous
= 15/17
cos(y°) = Adjucent side/hypotenous
= 8/17
The relation between the ratio of sin(x) and cos(x) will be,


Therefore the ratios of sin x° and cos y° are 15/8.
To learn more about the trigonometric function visit:
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