Give the coordinates for points D and E without using any new variables. Then find the midpoint of DE. The image is of a quadrilateral DEBC drawn on a two dimensional graph. The co-ordinate of C is (-a,0) and of B is (0,-b). Vertices E and D are on x and y axis respectively. A. D(0, b), E(a, 0); midpoint of DE=(b2,a2) B. D(0, a), E(b, 0); midpoint of DE=(b2,a2) C. D(0, b), E(a, 0); midpoint of DE=(a2,b2) D. D(0, a), E(b, 0); midpoint of DE=(a2,b2)

its 8

step-by-step explanation:

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this