2 the answer is two I put it in the calculator
When you reflect in the y axis, the x co - ordinate is reversed but the y co - ordinate stays the same. (10, -4) is in the form (x, y).
Answer : (-10, -4)
Please feel free to ask any questions you may have
I would say that the tree is 12 feet high.
And to find out the answer you could use the quadratic formula :)
Use A' for A complement, etc. and n = intersection ∩.
n(A' n B')
=n(A u B)' by the de Morgan's law
=nU-n(nA+nB-n(AnB)) n(A u B) = nA + nB - n(AnB) and nX'=nU-nX
=400-(135+80-60)
=400-155
=245