Answer:
a.
Step-by-step explanation:
Answer:
-14
Step-by-step explanation:
substitute 4 for x
28(4) - 9 (2(4)+ 6)
multiply
112-9(8+6)
add numbers
112-9(14)
multiply
112-126
subtract
-14
You can make some algebraic equations and solve it.
The first would be:
![x \times y = - 21](https://tex.z-dn.net/?f=x%20%5Ctimes%20y%20%3D%20%20-%2021)
The second would be
![x + y = - 4](https://tex.z-dn.net/?f=x%20%2B%20y%20%3D%20%20-%204)
You can then rearrange the second into
![x = - 4 - y](https://tex.z-dn.net/?f=x%20%3D%20%20-%204%20-%20y)
And subsitute it into the first like so:
![( - y - 4) \times y = - 21](https://tex.z-dn.net/?f=%28%20-%20y%20-%204%29%20%5Ctimes%20y%20%3D%20-%20%2021)
After that, distribute the y into the parantheses.
![{ - y}^{2} - 4y = - 21](https://tex.z-dn.net/?f=%20%7B%20-%20y%7D%5E%7B2%7D%20%20-%204y%20%3D%20%20-%2021)
Subtract the 21 on both sides and multiply by -1 on both sides:
![{ - y}^{2} - 4y + 21 \\ {y}^{2} + 4y - 21](https://tex.z-dn.net/?f=%20%7B%20-%20y%7D%5E%7B2%7D%20%20-%204y%20%20%2B%20%2021%20%5C%5C%20%7By%7D%5E%7B2%7D%20%20%2B%204y%20%20-%20%2021)
You then can factor it into:
![(y + 3) \times (y - 7) = 0](https://tex.z-dn.net/?f=%28y%20%2B%203%29%20%5Ctimes%20%28y%20-%207%29%20%3D%200)
With Zero Product Property, we can determine y to be either -3 and 7. Since the variables are interchangable, you can say the same about x, just that whatever x is, y must be the other value.
Thus, the answer is 7 and -3.
Answer:
D)
Step-by-step explanation:
49 degrees + 86 degrees = 135 degrees
line QT=180 degrees
135 degrees + 45 degrees = 180 degrees
Answer:
C) 1
there is only one space between L and D