Which one you need help on
-4n+12
Explanation-
Like terms
Answer:
Since m<BCA=m<CAB=55°, it follows that |AB|=|AC|, this means triangle ABC is isosceles.
Step-by-step explanation:
In the diagram AB is parallel to DC.
This means that, by the alternate interior angles theorem?
![\angle \: CAB = 55 \degree](https://tex.z-dn.net/?f=%20%5Cangle%20%5C%3A%20CAB%20%3D%2055%20%5Cdegree)
Also the sum of angles in a triangle should be 180° .
![m \angle \: BCA = 55 \degree + 70 \degree = 180 \degree](https://tex.z-dn.net/?f=m%20%5Cangle%20%5C%3A%20BCA%20%3D%20%2055%20%5Cdegree%20%2B%2070%20%5Cdegree%20%3D%20180%20%5Cdegree)
![m \angle \: BCA = 180 - 55 - 70 = 55 \degree](https://tex.z-dn.net/?f=m%20%5Cangle%20%5C%3A%20BCA%20%3D%20%20180%20-%2055%20-%2070%20%3D%2055%20%20%5Cdegree)
Since m<BCA=m<CAB=55°, it follows that |AB|=|AC|
Hence triangle ABC is isosceles.
Answer:
the first option, (-4, 6)
Step-by-step explanation:
for this question, we can use the substitution method. this is where we substitute the coordinates in the answer choices into the given system of inequalities or equations to determine which one is true.
1. (-4,6)
x + 4y > 12
-4 + 4(6) > 12
20 > 12 is true
now we can substitute the second inequality.
3(6) > -4 + 6
18 > 2 is true, therefore making this set of points true.
it may be helpful to substitute the rest of the values of x and y into the inequalities to verify your answers :
5 + 4(2) > 12
5 + 8 > 12
13> 12 is true
3(2) > 5 + 6
6 > 11 is not true
the rest of the answer choices are also not true.
I hope this helped you!
Answer:
115
Step-by-step explanation:
Perimeter = add all sides
15 + 20 + 30 + 50 =115
Hope this helps