<h2>
Greetings!</h2>
Answer:
a = 17
Step-by-step explanation:
Because all the lines are congruent (same length) as indicted by the lines, this means that every angle is the same.
180 ÷ 3 = 60
So every angle is 60°
This also means that:
4a - 8 = 60
Isolate the 4a by moving the -8 over to the other side, making it a +8:
4a = 60 + 8
4a = 68
Now simply divide both sides by 4 to get the value of 1a:
a = 17
<h3>So a = 17 </h3><h3 /><h2>Hope this helps!</h2>
Answer:
Step-by-step explanation:
x = y - 7 ---------------------(1)
-y - 2x = 8 --------------------(2)
Put Equation (1) into (2)
- y - 2 ( y-7 ) = 8
-y - 2y + 14 = 8
-3y = 8 - 14
-3y = -6
Divide -3 to both sides
y = -6 / -3
y = 2
Put y = 2 in (1)
x = 2 - 7
x = -5
So,
x = -5 , y = 2
![\rule[225]{225}{2}](https://tex.z-dn.net/?f=%5Crule%5B225%5D%7B225%7D%7B2%7D)
Hope this helped!
<h3>~AH1807</h3>
Answer: 13
Explanation:
Use Pythagorean theorem:
=> a^2 + b^2 = c^2
=> 5^2 + 12^2 = c^2
=> 25 + 144 = c^2
=> 169 = c^2
Take the square root of both sides:
=> sqrt(169) = sqrt (c^2)
=> 13 = c
D! all of the others do not equal y.
