Answer:

Step-by-step explanation:
2x² + 3x + 3 = 20
⇔ 2x² + 3x + 3 - 20 = 0
⇔ 2x² + 3x - 17 = 0
<u>Using the Quadratic Formula to solve a Quadratic Equation</u> :

In the equation 2x² + 3x - 17 = 0
a = 2 , b = 3 and c = -17
Then
b² - 4ac = 3² - 4×2×(-17)
= 9 + 8 × 17
= 9 + 136
= 145
Then
b² - 4ac > 0
Then

Then

I think I'll be 6/13= 0.4615
425 tickets, if only 3 student tickets were sold... 428 total minus 3 student tickets = 425 adult tickets + 3 sold student tickets.
5x - 6 = 29
Add 6 to both sides
5x = 25
Divide both sides by 5
x = 5
Answer and Step-by-step explanation:
Abel is incorrect.
denotes that the two terms are being multiplied. Instead of multiplying, Abel added these two terms.
The correct solution would be:
