Answer:
John's height = 130 cm
Alexa's height = 120 cm
Tacy's height = 100 cm
Step-by-step explanation:
We are given the falling in the question:
John's height = 130 cm
The total height of Tacy, John, and Alexa is 350 cm
Let x be Tacy's height and y be Alexa's height.
Thus, we can write the equation:

Tacy is 30 cm shorter than John.
Thus, Tacy's height =

Thus, Tacy is 100 cm tall.
Alexa is 20 cm taller than Tacy.
Thus, Alexa's height

Thus, the height are:
John's height = 130 cm
Alexa's height = 120 cm
Tacy's height = 100 cm
Answer:
x = 20
Step-by-step explanation:
The angles are same side interior angles so the add to 180
3x-10 + 5x+30 = 180
Combine like terms
8x +20 =180
Subtract 20 from each side
8x+20 -20 =180-20
8x = 160
Divide by 8
8x/8 =160/8
x = 20
CAB= 70
C is 60 cuz it’s supp to the 120
60+50= 110 and 180-110 is 70 :)
Answer: -3
Step-by-step explanation: