Find the value of each variable.
a four-sided polygon has angles labeled as follows: y degrees, 102 degrees, 81 degrees, z degrees. a straight line containing the angle labeled z degrees forms a second angle, labeled 115 degrees.
y=
z=

Step-by-step explanation:

The sum of adjacent angles on a straight line is .

The sum of angles in a quadrilateral is 360 degrees.

The difference of five and negative 7. 
1.       Which becomes 5 – (-1) =  6. Such that 5 + 1 = 6. The total number of fruits available. 

Three hundred apples minus thirty oranges. 
1.       300 – 30 =  270 fruits 

The room temperature of thirty degrees Celsius has risen to fourty-five degrees Celsius. What is the difference of the final and initial temperatures? 
1.       45 – 30 = 15 

When the ball rose with an acceleration of 2 m/s2 what is the difference between the ball’s acceleration and the gravitational force that acted on it? 
1.       -10 - 2 = -12 
 
Hope this helps