Number of students in senior class is 130
<em><u>Solution:</u></em>
Given that Every student in the senior class is taking history or science
85 of them taking both history and science
106 seniors takes history
109 seniors takes science
To find: number of students in senior class
Let A be the set of the students of the senior class that take history
Let B be the set of students of senior class that they science
The number of students in senior class is given by:
Where,
A = 106 and B = 109 and |A n B| = 85
Thus number of students in senior class is 130
Cool story. I think you might be asking how long they had to walk and ride.
3.5*.66 = 2.31 miles drove
3.5*.33 = 1.15 miles walked
Answer:
D
Step-by-step explanation:
a² - b² ← is a difference of squares and is factored in general as
(a + b)(a - b)
42² - 38² ← is a difference of squares and factors as
42² - 38² = (42 + 38)(42 - 38) = 80(4) = 320 → D
2nd one its like one big right angle so must add to 90
So (x+9)+2x=90
Answer
-4.25
Step-by-step explanation:
I used this site: https://www.symbolab.com/solver/algebra-calculator
Have a great day !