Answer:
30 - (20 ÷ x) ⋅ 4
Step-by-step explanation:
expanding the brackets makes this:
-63g – 36 + 14g² + 8g
simplifying it more makes this:
14g²–55g–36
hope that helped:)
Square has 4 equal sides so it would be the same for all the corresponding sides.
area of square =

=

=

area of triangle =

=

=

=

total area =
The cardinality of the union between two sets is given by

In fact, if an element is in both A and B, it is counted in both N(A) and N(B), so we're counting it twice. By subtracting the cardinality of the interserction, we're taking back one of these "extra-counted" element, and the count is correct. In your case, the numbers are

This means that the two sets cover, without repetitions, 43 of the 66 elements in the sets. So, there are

elements which are in neither A nor B