Use the FOIL (first, outside, inside, last) to expand the terms in the brackets.
(w - 7)(w + 4)
first: w × w = w²
outside: w × 4 = 4w
inside: -7 × w = -7w
last: -7 × 4 = -28
Now you add all the terms together to get:
w² + 4w - 7w - 28
This simplifies to give you:
w² - 3w - 28
Hope that helps! :)
2^3×4^7+63 = 131135
2^3×4^7-63 = 131009
Answer:
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Answer:
Step-by-step explanation:
8 2
16 4
24 6
32 8
40 10
???
Answer:
The total cost = $714
Step-by-step explanation:
Given
The total cost can be determined by adding the costs of all the pieces of equipment.
Thus,
Total cost = Monitor cost + Scanner cost + Keyboard cost + Printer cost
= $287 + $58 + $49 + $320
= $714
Therefore, the total cost = $714
