We need to find how many students have at least one social media account.
We know that there are 120 students in the class.
We also know that there are 65% of students that have at least one social media account.
To find your answer, would multiply 120 by 0.65:
120 · 0.65 = 78
This means that 78 of the students has at least one social media account.
Answer:
78 students
The equation is y = -x - 1
Given:
cat carrier : 39.99
cat tower: 19.99
1st discount : 5%
2nd discount: 15% - cat tower
39.99 * 5% = 1.99
39.99 - 1.99 = 38
19.99 * (5% + 15%) = 19.99 * 20% = 3.99
19.99 - 3.99 = 16
38 + 16 = 54
Andrea estimated correctly.
Matrix are used to represent numbers in rows and columns.
The position of the matrix elements are:
Matrix elements are named using the row and column, the element belongs to.
For instance:
The name of an element in the third row and fifth column of a matrix b is 
Using the above explanation, the name of 7, -5 and -1 is as follows;
7 belongs to row 2 and column 1
So, the name is: 
-5 belongs to row 3 and column 4
So, the name is: 
-1 belongs to row 1 and column 2
So, the name is: 
Read more about position of matrix at:
brainly.com/question/17409182
Applying the tangent ratio, the height, in feet, of the lamppost is calculated as: D. 10(tan50°)
<h3>What is the Tangent Ratio?</h3>
Tangent ratio, is, tan ∅ = opposite side / adjacent side of the right triangle.
Given the following:
∅ = 50°
Opposite side = AB (height) = ?
Adjacent side = 10 feet
Apply the tangent ratio:
tan 50 = AB/10
AB = 10(tan50°)
Learn more about the tangent ratio on:
brainly.com/question/4326804
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