∠a and
∠
b
∠b are supplementary angles. if m
∠
a
=
(
5
x
+
23
)
∘
∠a=(5x+23)
∘
and m
∠
b
=
(
4
x
−
5
)
∘
∠b=(4x−5)
∘
, then find the measure of
∠
a
∠a.

Which of the following is the shape of a cross section of the figure shown below

Parabolas y=−2x^2 and y=2x^2+k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.

Stefanie is painting her bedroom. she can paint 2 1/3 square feet in 4/5 of an hour. how many square feet can she paint in one hour?