ANSWER
The correct answer is B
<u>EXPLANATION</u>
The first function is

We make y the subject to obtain;

Let us quickly write this in the vertex form.



Since the
is negative, the graph opens up.
The vertex is at 
The y-intercept is 
The x-intercept is found by equating the function to zero.





With these information we can quickly sketch the graph as shown in the attachment(the red graph).
For the second function,

we again make y the subject to obtain,

This is a basic quadratic function that can be graphed easily. Note that it is also a maximum graph.
From the graph the solution to the two functions is

Q7: D
Q8: B
Step-by-step explanation:
Q7:
A cuboid is a three-dimensional shape, having six faces, where all the faces (top, bottom, and lateral faces) of the prism are rectangles, and every two opposing side faces are identical.
Therefore a cuboid is a rectangular prism.
Q8:
Volume of a cube
= l³
= 6 x 6 x 6
= 216 m³
Answer:
In the explanation. :)
Step-by-step explanation:
Find the exact value using trigonometric identities.
50
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3 p
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t
Hope this helps. Have a great day!
Answer:
18.46
Step-by-step explanation:
find the area using SSS, then solve for height