Answer:
b. -1
Step-by-step explanation:
9=4a+13
-13 -13
--------------
-4=4a
4a/-4
a=-1
Answer:
21°
Step-by-step explanation:
set it up
7x-1+3x-9=180
combine like terms
10x-10=180
take the ten to the other side
10x=190
divide both sides by 10
x=19
plug x in
3(10)-9
30-9
21
(Incase you need it the other angle is 159°)
Answer:
-7/2
Step-by-step explanation:
Answer:
p ≥ 9
Step-by-step explanation:
1. Put words into equation
p-6 greater than or equal to 3 = p-6≥3
2. Solve
p-6≥3
+6 +6
p≥9
I hope that helped!
Answer:
Step-by-step explanation:
If AB = AD, then you have that triangle ABD is an isosceles triangle (it has two equal sides). If it is isosceles, then the angles opposite to angles those equal sides must be equal. Then angle ADB = 
. and by the property of all internal angles of a triangle have to add to 
, we get that:
