Answer:
The length of the shortest piece is 11 inches. The length of the medium piece is 14 inches. The length of the longest piece is 20 inches.
Step-by-step explanation:
Ok, so we have a long sandwich of 45 inches that will be divided in 3, giving us the following formula (x = shortest, y = medium, z=longest):
x + y + z = 45
Then we have middle piece (y) is 3 inches longer than the smallest (x):
y = x + 3
And the shortest piece (x) is 9 inches shorter than the longest (z):
x = z - 9 or z = x + 9
Let's place the found values of y and z in the first equation:
x + y + z = 45
x + (x + 3) + (x + 9) = 45
3x + 12 = 45
3x = 33
x = 11
So, x = 11, y = 14 and z = 20. (11 + 14 + 20 = 45).
Answer:
B
Step-by-step explanation:
(x+7)(x+5)
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It’s a square, so all 4 sides are the same length, 16.8 inches, multiply 16.8 x 16.8 for area, 282.24 inches squared, or 23 feet and 6.24 inches squared, or 23.52 feet squared
Answer:
C. x=42
Step-by-step explanation:
16 + 3x + y = 180
126 + 16 + y = 180
y = 38
16 + 3x + 38 = 180
54 + 3x = 180
3x = 126
x=42
