Answer:
Question 4: (C)
Question 5: (B)
Step-by-step explanation:
Solving:

Delete the first parentheses by the distributive property, with the distributive property, we multiply the '3' first, then resolve it and the second parentheses eliminate by changing the sign:

<span>Now, put the numbers with letter (incognito) to the right and numbers without letter to the left, changing the signal when changing sides.
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Answer:
92722864
Hope this helps ya
Answer:
6x+90+11x+5=180(sum of interior angle of triangle)
17x=180-95
x=85/17=5 is your answer