1 answer:
Answer:
x = 40
Step-by-step explanation:
The three angles in a triangle add to 180 degrees
x + 30 + (3x-10) = 180
Combine like terms
4x +20 = 180
Subtract 20 from each side
4x+20-20 = 180-20
4x= 160
Divide each side by 4
4x/4 =160/4
x = 40
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Step-by-step explanation:
Answer:
12
Step-by-step explanation:
40/100*30
=12
Y= -2x-5
Work:
8x+4y=-20
4y=-20-8x
y= -2x-5
