Answer:

Step-by-step explanation:
We need to write a quadratic equation so we can use standard quadratic equation:

Plug the given points to get three equations.
for (7,4), we plug x=7 and y=4

...(i)
similarly using other two points, we get:
...(ii)
...(iii)
Now we solve those three equations by any method like substitution, or matrices or by any method and get:

Now plug these values into
, we get final equation as:

Use <span><span> bh</span> + (S</span>1+ S2 + S3<span>)H to find the T.A.
</span>Triangle: base 'b', height 'h', and sides S1, S2 and S3<span>
</span>use L=Ph to find L.A. (<span>the surface area of all sides, or faces, that are not the base)</span>
L= the lateral area of the prism, P= the perimeter of one base, h= the height of the prism
Answer: I’m pretty sure it’s C(x)=0.75(x-5) since it’s the same formula as the question
Step-by-step explanation:
Answer:
11.325 is what I got
Step-by-step explanation:
In a parallelogram the 4 angles need to sum to 360 degrees. There are two sets of identical angles, so one of the other angles would also be 80 degrees.
Now find the other two angles:
360 - 80 - 80 = 200 degrees
200 degrees / 21 = 100 degrees each.
The other 3 angles are: 80, 100 and 100