Answer:
4.2
Step-by-step explanation:
4.1553
15 -> 2
4.2
Answer:
this is just trial and error. Answer is 3
Answer:
33.5
Step-by-step explanation:
just separate this shape into triangles and rectangles and find the area of those shapes separately then add them altogether.
hope this helped (:
The first step in solving this is to substitute x with 3 and y with 2, so that

becomes

Then simply solve using the order of operations.
First exponents (there are no parentheses)

Then multiply and divide

And finally add and subtract

Therefore the value <span>of 1/3 x^2 + 5.2y when x=3 and y=2 is 13.4</span>
Answer:
See below
Step-by-step explanation:
<em>Vector argument</em>
Vector DF is (5, -4) - (5, 5) = (0, -9).
Vector EG is (2, 2) - (8, 2) = (-6, 0).
The dot-product of these two vector is (0, -9)•(-6, 0) = 0·(-6) + (-9)·0 = 0.
When the dot-product of two vectors is zero, those vectors are at right-angles to each other. Therefore diagaonal DF ⊥ diagonal EG.
_____
<em>Alternate argument</em>
The x-coordinates of points D and F are the same, so diagonal DF is a vertical line. The y-coordinates of points E and G are the same, so diagonal EG is a horizontal line. Vertical lines are perpendicular to horizontal lines, so DF ⊥ EG.