Answer:
No graph so we'll use the quadratic formula
x^2+x-4=0
a = 1
b = 1
c = -4
x = -1 +- sqr root (1^2 - 4 * 1 * -4) / 2
x = (-1 +- sqr root (1 +16) ) / 2
x1 = (-1 + sqr root (17)) / 2
x2 = (-1 - sqr root (17)) / 2
Step-by-step explanation:
Answer:
3
Step-by-step explanation:
What are you confused by?
The equation that best models this situation would be: y=40+30x
Discount amount:
10% of $10.95 = 10/100 × $10.95
= $1.095
Discounted sales:
$10.95 - $1.095 = $9.855 ≈ $9.86 (2 d.p.)