Answer: Option B and option D.
Step-by-step explanation:
We know that a quadrilateral is a 2-dimensional closed shape that has four sides.
By definition the diagonals of a quadrilateral are the lines that connect two non-adjacent vertices.
The following quadrilaterals have diagonals that are perpendicular to each other (also known as perpendicular bisector diagonals), which means that they form four angles of 90 degrees (right angles): <em>Rhombus and Square.</em>
Therefore the answers are: the option B and the option D.
The answer would be -84.
Here are the steps I did.
1. Simplify 4 + 8 to 12 ( -7 * 12 )
2. Now lastly simplify and u get -84.
Answer: 2500
Step-by-step explanation:
C = -840
Isolate C by subtracting 900 on both sides:
C = 60-900
Which then gives u C = -840
Solution: Alyssa is incorrect.
In fact 
.
If we cross-multiply the above equation, we have:
Therefore, they are equal.
Also, if we reduce the given fractions, we have:
And
Since both the fractions reduced to 
, therefore fractions are equivalent.
