11011₂ = 2⁴ + 2³ + 2¹ + 2⁰ = 27
15 + <em>x</em>₂ = 27
<em>x</em>₂ = 12 = 8 + 4 = 2³ + 2² = 1100₂
Sebastian went up 7 floors not down so it shouldn't be -7 and he went down 9 floors so it should be 7-9
Answer:
y= (C - Az)/B
Step-by-step explanation:
Az +By = C
Az - Az + By = C - Az
By = C - Az
Divide both side by the coefficient of y which is B
therefore we have:
y = (C - Az)/B
Answer:

Step-by-step explanation:
The series is an arithmetic series with first term (a1) -9 and common difference (d) 5. Then the general term (an) is ...
an = a1 +d(n-1) = -9 +5(n-1) = -14 +5n
The summation notation indicates the sum of "n" of these terms.