Answer:
Write the quadratic equation in general form then choose the value of “b”.
(2x-1)(x+5)=0
<u>A.)9</u>
B.)10
C.)11
Step-by-step explanation:
Expand 
Which is 

So the value of B is 9
The pair of numbers that would have 20 as their lcm is 4 and 5
I strongly believe your answer is correct
I'd prefer 5/7 because both numbers would be in decimals and you dont need decimals
I think the answer is chunking.
This is due to effect of chunking because chunking is basically the multi-store memorizing method.