5k²-8k-45k+72 = 5k²-53k+72
Answer: 5k² - 53k + 72
Answer:
The correct answer for this problem is the 2nd one because all you have to do is count how far each one is from -1 and -2
Step-by-step explanation:
The two are perpendicular to each other because the two slopes are negative reciprocals
(Y2 - Y1) / (X2 - X1)
First slope:
( 1 - (-1)) / (-11 - (-6))
2/-5
Second slope:
(-13 - (-8)) / (-5 - (-3))
-5/-2 or 5/2
You know when two aliens are perpendicular when you multiply the two slopes and get -1 as the product
-2/5 X 5/2 = -1
Thus the two lines are perpendicular to each other.
Simple...
you have:
1.) x-3y when x=-4 and y=9
-->>> (plug it in)
-4-3(9)
-4-27
-31
2.) a-|b| when a=-7.6 and b=-8.9
-->>>(plug it in)
-7.6-|-8.9|
-16.5
3.) 3(8x-y) when x=-4 and y=9
-->>(plug it in)
3(8(-4)-9)
3(-32-9)
3(-41)
-123
4.)
![\frac{9c}{d}](https://tex.z-dn.net/?f=%20%5Cfrac%7B9c%7D%7Bd%7D%20)
when c=2 and d=
![\frac{1}{3}](https://tex.z-dn.net/?f=%20%5Cfrac%7B1%7D%7B3%7D%20)
![\frac{9(2)}{ \frac{1}{3} }](https://tex.z-dn.net/?f=%20%5Cfrac%7B9%282%29%7D%7B%20%5Cfrac%7B1%7D%7B3%7D%20%7D%20)
![\frac{18}{ \frac{1}{3} }](https://tex.z-dn.net/?f=%20%5Cfrac%7B18%7D%7B%20%5Cfrac%7B1%7D%7B3%7D%20%7D%20)
54
Thus, your answer.