20% off means you paid only 80% of the original price.
0.8x=40
x=40÷0.8=50
so the original price is 50
Answer:
a triangle always equals 180 degrees so
63+ 2x+8 + x+7 =180
solve for x
and then plug it back into original equation
let me know if this makes sense
glad to help you more if needed
Step-by-step explanation:
Answer:

Step-by-step explanation:
Exponent Multiplication Rule :

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Solving :
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Answer: -2
Step-by-step explanation: