Answer:
The product is the difference of squares is 
Step-by-step explanation:
Explanation
- The given expression is (5 k+6)(5 k-6).
- We have to multiply the given expression.
- Square the first term 5k. Square the last term 6 .
Let the first car travel east (to the right) and the second car west (to the left). Call the distances traveled e and w respectively.
The first car starts out an hour before the second car (that is, at hour 0), traveling at 55 mph. During the first hour, this car travels 55 miles east. A general equation for the distance traveled from the starting point as a function of x (time) is e=(55 mph)(1 hour) + (55mph)x
The other car starts out at time = 1 hour, at 75 mph. A general equation for the distance traveled from the same starting point as a function of x is then w = (75 mph)x.
We want to know when the total distance traveled in opposite directions by the two cars is e + w = (55 miles) + (55 mph)x + (75 mph)x = 380 mi
Solve for x. 55 miles + (55+75)(mph)x = 380 miles
(130 mph)x = 325 miles
Divide both sides by (130 mph):
(130 mph) x 325 miles
------------------ = -------------------- = 2.5 hours (answer)
(130 mph) 13 mph
This makes no sense could you rewrite it please
7 + 0.5 + 0.5 = 8
7 x 8 = 56
7 x 0.5 = 3.5
3.5 x 4 = 14
56 - 14 = 42cm^2
