the answer to the first question would be 
the answer to the second question will be 
One t-shirt = $19
Number of t-shirts = $57 ÷ $19 = 3
Answer: 3 t-shirts
No because if it was put on a graph it would not go through the origin (0,0)
Answer:
[-3 ±√(89)]/10
Step-by-step explanation:
<u>Points to remember</u>
Quadratic formula for finding the solution of a quadratic equation ax² + bx + c = 0 is given by,
x = [-b ± √(b² - 4ac)]/2a
It is given a quadratic equation,
5x² + 3x - 4
<u>To find the solution using formula</u>
Here a = 5, b = 3 and c = -4
x = [-b ± √(b² - 4ac)]/2a
= [-3 ± √((-3)² - 4*5*(-4))]/2*5
= [-3 ±√(9 +80)]/10
= [-3 ±√(89)]/10
