Not sure what x' means but
seems to be the reverse distributive property
normally written as
a(b+c)=ab+ac
we can see the similarity
a(x'+y)=ax+ay
distributive property
Product of two polynomials can be done by distribution of multiplication over addition. The product of 
<h3>What is distributive property of multiplication over addition?</h3>
Suppose a, b and c are three numbers. Then we have:

(a(b+c) means a multiplied to (b+c). The sign of multiplication is usually hidden when using symbols and both quantities which are in multiplication are written together without space)
The product result of the given expression is obtained as:

Thus,
The product of
Learn more about polynomial product here;
brainly.com/question/9106484
Check that the radar pistol has an error of 7 mph.
Then we have that:
59 mph - 7 mph = 52 mph approximately.
52mph <55mph
Answer:
He does not have irrefutable evidence that the car was speeding in a 55 mph zone
<span>Try to substitute w = 36 in your formula D=4*w+30</span>