Answer:
42.4 mph
Step-by-step explanation:
5÷212= 42.4mph (average speed)
Answer:
The perimeter of the square is ![36\sqrt{x}\ cm](https://tex.z-dn.net/?f=36%5Csqrt%7Bx%7D%5C%20cm)
Step-by-step explanation:
step 1
Find the length side of the square
we know that
The area of a square is equal to
![A=b^{2}](https://tex.z-dn.net/?f=A%3Db%5E%7B2%7D)
where
b is the length side of the square
we have
![A=81x\ cm^{2}](https://tex.z-dn.net/?f=A%3D81x%5C%20cm%5E%7B2%7D)
substitute and solve for b
![81x=b^{2}](https://tex.z-dn.net/?f=81x%3Db%5E%7B2%7D)
square root both sides
![b=9\sqrt{x}\ cm](https://tex.z-dn.net/?f=b%3D9%5Csqrt%7Bx%7D%5C%20cm)
step 2
Find the perimeter of the square
we know that
The perimeter of the square is equal to
![P=4b](https://tex.z-dn.net/?f=P%3D4b)
we have
![b=9\sqrt{x}\ cm](https://tex.z-dn.net/?f=b%3D9%5Csqrt%7Bx%7D%5C%20cm)
substitute
![P=(4)9\sqrt{x}](https://tex.z-dn.net/?f=P%3D%284%299%5Csqrt%7Bx%7D)
![P=36\sqrt{x}\ cm](https://tex.z-dn.net/?f=P%3D36%5Csqrt%7Bx%7D%5C%20cm)
Answer:
I think the answer is (-3,1)
Answer:
B
Step-by-step explanation:
If you look at A and you subtract 3x by 4x you get x and you subtract 3 from -7 and you get -10. But if you look at B you do the stuff in the parentheses first and you get 4x+12x+28=16x+28 and they're the same so it's B.
Answer:
2 pairs
Step-by-step explanation:
The north & south sides are parallel and the east & west are parallel.