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Solve the following: 1) 3(1)/(2) + (3(1)/(2) of 3(1)/(2)) of (1)/(8) 2) (0.325 x 2.76 x 100)/(13 x 0.25 x 92)

Mathematics

ScanSolve AI Answer

Answer

e
39

Step-by-step solution

2 steps

Here are the solutions to the problems:

1) Using your knowledge of BODMAS, solve the following:

312+(312 of 312) of 183\frac{1}{2} + \left(3\frac{1}{2} \text{ of } 3\frac{1}{2}\right) \text{ of } \frac{1}{8}

Step 1: Convert mixed numbers to improper fractions.

312=3×2+12=723\frac{1}{2} = \frac{3 \times 2 + 1}{2} = \frac{7}{2}

The expression becomes:

72+(72×72)×18\frac{7}{2} + \left(\frac{7}{2} \times \frac{7}{2}\right) \times \frac{1}{8}

Step 2: Solve the operation inside the parentheses (multiplication).

(72×72)=494\left(\frac{7}{2} \times \frac{7}{2}\right) = \frac{49}{4}

The expression becomes:

72+494×18\frac{7}{2} + \frac{49}{4} \times \frac{1}{8}

Step 3: Perform the multiplication ("of") operation.

494×18=49×14×8=4932\frac{49}{4} \times \frac{1}{8} = \frac{49 \times 1}{4 \times 8} = \frac{49}{32}

The expression becomes:

72+4932\frac{7}{2} + \frac{49}{32}

Step 4: Perform the addition. Find a common denominator, which is 32.

72=7×162×16=11232\frac{7}{2} = \frac{7 \times 16}{2 \times 16} = \frac{112}{32} 11232+4932=112+4932=16132\frac{112}{32} + \frac{49}{32} = \frac{112 + 49}{32} = \frac{161}{32}

Step 5: Convert the improper fraction to a mixed number.

16132=5132\frac{161}{32} = 5 \frac{1}{32}

The solution is 5132\boxed{5\frac{1}{32}}.

2) Solve:

0.325×2.76×10013×0.25×92\frac{0.325 \times 2.76 \times 100}{13 \times 0.25 \times 92}

Step 1: Simplify the numerator by multiplying by 100.

0.325×2.76×100=0.325×2760.325 \times 2.76 \times 100 = 0.325 \times 276

Step 2: Rewrite the expression and simplify by grouping terms.

0.325×27613×0.25×92=0.3250.25×27692×113\frac{0.325 \times 276}{13 \times 0.25 \times 92} = \frac{0.325}{0.25} \times \frac{276}{92} \times \frac{1}{13}

Step 3: Calculate each fraction.

0.3250.25=325250=13×2510×25=1310=1.3\frac{0.325}{0.25} = \frac{325}{250} = \frac{13 \times 25}{10 \times 25} = \frac{13}{10} = 1.3 27692=3\frac{276}{92} = 3

Step 4: Substitute the simplified values back into the expression and multiply.

1.3×3×113=1310×3×1131.3 \times 3 \times \frac{1}{13} = \frac{13}{10} \times 3 \times \frac{1}{13} =310= \frac{3}{10}

Step 5: Convert the fraction to a decimal.

310=0.3\frac{3}{10} = 0.3

The solution is 0.3\boxed{0.3}.

3) Given the universal set U={1,2,3,4,…,20}\mathcal{U} = \{1, 2, 3, 4, \dots, 20\}, If Set A = {Multiples of 3} and B = {Factors of 18} Find:

Part a

Elements of Set A

Set A consists of multiples of 3 within the universal set U\mathcal{U}.

A={3,6,9,12,15,18}A = \{3, 6, 9, 12, 15, 18\}

Part b

Elements of Set B

Set B consists of factors of 18.

B={1,2,3,6,9,18}B = \{1, 2, 3, 6, 9, 18\}

Part c

A∪BA \cup B

The union of A and B includes all unique elements from both sets.

A∪B={1,2,3,6,9,12,15,18}A \cup B = \{1, 2, 3, 6, 9, 12, 15, 18\}

Part d· 2 steps

(A∩B)′(A \cap B)'

  1. Find the intersection of A and B (A∩BA \cap B), which are the elements common to both sets.

    A∩B={3,6,9,18}A \cap B = \{3, 6, 9, 18\}
  2. Find the complement of (A∩B)(A \cap B), denoted as (A∩B)′(A \cap B)'.

    This includes all elements in the universal set U\mathcal{U} that are not in A∩BA \cap B.

    U={1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20}\mathcal{U} = \{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20\} (A∩B)′={1,2,4,5,7,8,10,11,12,13,14,15,16,17,19,20}(A \cap B)' = \{1, 2, 4, 5, 7, 8, 10, 11, 12, 13, 14, 15, 16, 17, 19, 20\}

Part e39

What is the sum of the elements of B?

The elements of Set B are {1,2,3,6,9,18}\{1, 2, 3, 6, 9, 18\}.

Sum=1+2+3+6+9+18\text{Sum} = 1 + 2 + 3 + 6 + 9 + 18 Sum=39\text{Sum} = 39

The sum of the elements of B is 39\boxed{39}.

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