The series is 84(1+1/5+1/25+...)=84(1/(1-1/5)=84÷4/5=84×5/4=21×5=105. Upper limit is 105.
Hey There!
To find the blank you have to multiply

*

=
Answer:
yes, all of it is correct
Step-by-step explanation:
For the two triangles to be congruent, you would need the following angles and lengths to be congruent with each other.
Answer:
x+5=2x-7
-x=-12 /÷(-1)
x=12
JK = x+5
JK = 17
simple equations no need to know geometry