The answer to the first one is ' D '.
(All the angles inside a triangle have to add up to exactly 180 degrees.)
The answer to the second one is ' C ' .
(If two sides are equal, then the sides opposite them are also equal.)
Answer:
b) -5
Step-by-step explanation:
-5 x/x
We can cancel the x/x because it equals 1
-5 (1)
-5
Answer: Y = 4
the output is 4
Step-by-step explanation:
substitute the given input value, 3, for x and solve
Y= 10 -2x
Y = 10 -2(3) multiply -2 × 3 to get -6
Y = 10 -6 . subtract
Y = 4
Answer: C , triangles reflected across the line Y=X
Explanation: The line Y=X intersects through the origin and has a slope of positive 1, so if you imagine that line on the graph shown, you're able to see how the triangles are reflected across it.
Also, when the X and Y coordinates are "flipped" for each triangle, you can tell that it's reflected across Y=X. For example, the point at the right angle for the red triangle is (1,-1), while the corresponding point on the black triangle is at (-1,1), "flipping" the coordinates.
Hope this helps!!! :)
