Answer:
x = 34
Step-by-step explanation:
ΔABD and ΔBCD are both isosceles triangles
In ΔABD
AB =AD, hence ∠ABD = ∠ADB ( base angles are equal )
∠ABD = 
= 
= 68°
∠DBC = 180° - 68° = 112° ( straight angle )
∠BCD = x = 
= 
= 34
Answer:
-7/x
Step-by-step explanation:
first, you combine the terms together to get -7x^-1. you cant have negative exponents in the numerator so you move the x^-1 to the denominator. once it move its becomes positive then.
Answer: History textbooks sold: 198
Psychology: 114
Step-by-step explanation: 312- 84= 228
228 divided by 2= 114
Add 84 to 114 to represent the history textbooks since they have more.
Ok, but i think you explained it bad, tag me again so i can answer
