Multiply 3x9 and it gives u 27
And -3 plus -9 equal -12
= 6.37 * 10^4 = 637 * 10^2 = 63700
In short, Your Answer would be Option A
Hope this helps!
Answer:

Step-by-step explanation:
<em>Nothing can be done with the equation because there is no quotient. </em>
If there was, would be able to solve for x.
A=90 degrees divide by 5
=18 degrees
2c+a=90
2c+18=90
2c=90-18
2c=72
divide each side by 2
c=36
therefore:
2c=72
b=4a+c
b=4(18)+36
b=72+36
b=108
17-6×10÷2+12
Apply bodmas
=17-6×5+12
=17-30+12
=17-18
=-1