n=9
step-by-step explanation:
7 times a number = 7n
decreased by 13 = 7n-13
same as is =
5 times the number = 5n
increased by 5 = 5n+5
7n-13 = 5n+5
2n=18
d .tv
the side tv is included in both triangles. this means it corresponds to itself in the transformation.
this is justified by using the reflexive property, which states that anything is congruent to itself.
3x^3-2x^2+4x-3= -3
x^2+3x+3= 3
-3÷3= -1