What are the values of ∠, ∠, ∠ and ∠ in the given figure? Explain or show your work.

20 POINTS PLEASEPLEASE HELP

ABC = 72, CBF = 108, DBE = 18, and ABD = 90

Step-by-step explanation:

You can immediately tell that ABD is 90 based off of the square. Next, see that ABC is equal to EBF, making it 72 as well. To find the other two, first subtract 72 from 180 to get 108, or CBF. Then, subtract 90 from 108 to get DBE.

Hope this helped!

if the eqn of the parabola is f(x) = (x-4)(x+2), we need to mult. this out to find the coordinates of the vertex.

then f(x) = x^2 + 2x - 4x - 8, and f(x) = x^2 - 2x - 8.

one way in which you can find the vertex is to calculate x = -b / (2a).   here, that comes to

        )

x = = 1.   f(1) = 1^2 - 2(1) - 8 = - 9.   vertex is at (1, -9).

        2(1) 

find another point on the curve:   let x=0, for which y=-8.   then (0, -8) is on the curve.   plot the vertex and this point and draw a smooth parabola thru both.

hope this

question: how many people can she serve?

answer: she can serve 16.66666667 people. so she can only give 16 people a complete serving.

question: does she have enough ice cream for her guests?

answer: no. explanation: she only has enough for 16 people to have a full serving. however, she can give a 17th person a partial serving.