6+6=12 so if there is 239 people in the first 6 rows, the other six rows also has the same amount of people. So you add 239+239 and you got your answer, 478 people are in the first 12 rows
Answer:
30
Step-by-step explanation:
If the triangle is equilateral, that means all angles are equal
180/3 = 60 so all angles equal 60 degrees
<Y is an angle in the triangle so it equal 60 degrees
4/3x +20 = 60
Subtract 20 from each side
4/3x +20-20 = 60-20
4/3x = 40
Multiply each side by 3/4 to isolate x
4/3x * 3/4 = 40*3/4
x = 30
First semester: 2:7
Second semester: 5:4
5*15 = 75
15*4 = 60
75:60 (art class - gym class)
2:7
2*15 = 30
7*15 = 105
There were 30 students in art class and 105 students in gym class second semester.
The values are a = 7, b = -9, c = -18.
<u>Step-by-step explanation:</u>
The given quadratic equation is 
The general form of the quadratic equation is 
where,
- a is the coefficient of x².
- b is the coefficient of x.
- c is the constant term.
Now, you have to modify the given quadratic equation similar to the general form of quadratic equation.
So, bring the constant term 18 to the left side of the equation for equating it to zero.
⇒ 
Compare the above equation with general form 
⇒ a = 7
⇒ b = -9
⇒ c = -18
Therefore, the values of a, b, and c are 7, -9 and -18.