The price of a visit to the dentist is $50. If the dentist fills any cavities, an additional charge of $100 per cavity gets adde
2 answers:
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Answer:
54 cents
Step-by-step explanation:
The cost of bookmarks relating to the number of bookmarks is given by the graph shown. Therefore:
From the graph, we can determine the relationship between the cost of bookmarks and the number of bookmarks by using two points. The equation of a line passing through points is:
From the graph, y represents the cost of bookmarks in cents and x represent the number of bookmarks. we can see that it passes through the point (2, 30) and (7, 90). Hence:
The cost of 4 bookmarks (x = 4):
y = 12(4) + 6
y = 54 cents
Given a quadratic equation , we define the discriminant as
The number of real solutions of the equation depend on the sign of :
- If
the equation has two solutions
- If
the equation has one double solution
- If
the equation has no real solutions
In this case, we have
And so this equation has no real solutions.