Answer:
7 & a half hours
Step-by-step explanation:
390÷52= 7.5hr or 7 & a half hours
So try to isolate a by division and such
K=4a+9ab
we use reverse dstributive which is ab+ac=a(b+c) so
undistribute a
4a+9ab=a(4+9b)
k=a(4+9b)
divide both sides by (4+9b)

=a
a=
You have to write more for me to solve the question
Step-by-step explanation:
I didn't understood thr question and I'm pretty sure that u made a mistake while writing it
Answer:
<h2><u><em>
66,130</em></u></h2>
I just guessed random numbers until I got 66 and 130.