Answer:
3.45
Step-by-step explanation:
first you use a calculator.
Answer:

Step-by-step explanation:
A straight angle is equal to 180° degrees. Since both 9x +4 and 3x -18 is supplementary then I can make this claim below

All we have to do now is to solve for x

Answer:
4/10
Step-by-step explanation:
its like adding 3 +1 but in a different way
Answer:
the second one
Step-by-step explanation:
Answer:
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Step-by-step explanation: