Question 3
1 answer:
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11. The given parabola has equation:
We complete the square to have the function in the vertex form:
The vertex is (-3,-8), the graph opens down because a=-3<0
Ans: B. Vertex: (−3, −8), opens downward
12. We know the graph of is a parabola that opens up and has its minimum point at the origin.
The range of this function is
A straight line that has its y-intercept below the x-axis (y=3x-6) will not intersect and hence will form a system with no solution.
Ans: D. y equals x squared, y equals 3x minus 6
14. We want to find the zeros of
The factored form is
Ans: C. x = −7, −9
15. The given quadratic expression is
We split the middle term to obtain:
We factor by grouping to get:
Ans: D. 6x − 5
Answer:
800
Step-by-step explanation:
Given: The selling price of bed is 2400.
Discount offered is 25%
Lets assume the cost of bed be "x"
Discount offered on the cost price of bed=
∴ Discount offered on the cost price of bed= 0.25x
We know the selling price of bed after discount provided.
Finding the cost price of the bed.
⇒
⇒
cross multiplying both side.
∴
∴ Cost price of the bed is 3200.
We know selling price of the bed is 2400.
Now, finding the saving.
Saving on the price of bed= Cost price- selling price
Saving=
Hence, saving on the purchase of the bed is 800.