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skelet666 [1.2K]
2 years ago
8

If 5 inches represent 15 feet, how many inches would represent 45 feet?

Mathematics
1 answer:
r-ruslan [8.4K]2 years ago
5 0

Answer:

26 rows · An inch is a unit of length equal to exactly 2.54 centimeters. There are 12 inches in a foot, and 36 inches in a yard. There are 12 inches in a foot, and 36 inches in a yard. Feet to Inches Conversions

Step-by-step explanation:

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How many subsets of {1, 2, 3, 4, 6, 8, 10, 15} are there for which the sum of the elements is 15?
stepladder [879]

Answer:

512

Step-by-step explanation:

Suppose we ask how many subsets of {1,2,3,4,5} add up to a number ≥8. The crucial idea is that we partition the set into two parts; these two parts are called complements of each other. Obviously, the sum of the two parts must add up to 15. Exactly one of those parts is therefore ≥8. There must be at least one such part, because of the pigeonhole principle (specifically, two 7's are sufficient only to add up to 14). And if one part has sum ≥8, the other part—its complement—must have sum ≤15−8=7

.

For instance, if I divide the set into parts {1,2,4}

and {3,5}, the first part adds up to 7, and its complement adds up to 8

.

Once one makes that observation, the rest of the proof is straightforward. There are 25=32

different subsets of this set (including itself and the empty set). For each one, either its sum, or its complement's sum (but not both), must be ≥8. Since exactly half of the subsets have sum ≥8, the number of such subsets is 32/2, or 16.

8 0
3 years ago
Hellp pls. This is not a test, so pls do not report.
SashulF [63]
B is the correct answer

7 0
2 years ago
If someone could help me with this entire back side that would be great :)
SpyIntel [72]

Answer:

A.)x/8=3/4

x=6

B.)2/5=x/40

x=16

C.)1/8=x/12

x=3/2 or 1.5 or 1 1/2

D.)x/10=12/15

x=8

A.)x/2+x/6=7

x=21/2 or 10.5 or 10 1/2

B.)x/9+2x/2=1/3

x=3/10 or 0.3

3 0
3 years ago
Read 2 more answers
Becky is writing a coordinate proof to show that the diagonals of a parallelogram bisect each other. She starts by assigning coo
Darya [45]

Answer:

Read Under

Step-by-step explanation:

Just did the quiz. First one is "a + b"

Second spot put "a+b/2"

Third put "c/2"

Finally put "CE" and then "BE"

8 0
3 years ago
Read 2 more answers
PLEASE EXPLAIN YOUR ANSWER
umka21 [38]

Answer:

equivalent to 58/100

and 58%

Step-by-step explanation:

7 0
3 years ago
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