(2a+4b)(2a-7b)=
2a(2a-7b)+4b(2a-7b)=
4a^2-14ab+8ab-28b^2=
4a^2-6ab-28b^2
Answer:
the real answer is (8,-4)
Step-by-step explanation:
Answer:
C. -20
Step-by-step explanation:
Step 1: 
+ (-n) Write down equation
Step 2: 
+ (-12) insert values into equation
Step 3: 
- 12 Simplifying fraction and parentheses
Step 4: -8 - 12 Simplifying fraction 24/-3 = -8
Answer: -20
The diagonal fencing will be the hypotenuse of a right triangle with sides 120yds long so:
h=√2(120^2))
h=√28800 yd
And the surrounding fencing will just be four times the side length of 120yds so:
s=480yd
So the total fencing needed is:
f=480+√28800 yards
f≈649.71 yd (to nearest hundredth of a yard) which is
f≈650 yds (to nearest whole yard)
But, I wasn't sure, if they just want the diagonal fencing needed then it is just:
f=√28800
f≈170 yds (to nearest yard)
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