Answer:
15
Step-by-step explanation:
The given equation is


When we multiply we obtain the equations:


We add both equations to obtain:

Divide both sides by -7 to get:

Going to answer this in the comments because my keyboard is covering my screen :(
Answer:
w = 34°
Step-by-step explanation:
Every quadrilateral is equal to 360 degrees. If you know 3 out of the 4 angles, then what you need to do is add up each angle and subtract the sum from 360 to find the remaining angle.
90 + 90 + 146 = 326
360 - 326 = 34
w = 34
Step-by-step explanation:
Fifth is B
Sixth I think it is D.
Hope this helps...