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
Answer:
88
Step-by-step explanation:
You're trying to find the circumference of a circle. The general formula is: pi•D. D is the Diameter. 22/7 is the fraction version of Pi, so just do 3.14x28 and you will get your answer. 88
If the numbers are the percentage then the answer would be 10
Multiplication property of equality