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Vitek1552 [10]
3 years ago
13

3. (x2 + 17x + 63) ÷ (x + 8) =

Mathematics
1 answer:
Stolb23 [73]3 years ago
3 0

3(2x + 17x + 63) \div (8 + x) \\ 6x + 51 + 189 \div 8x
6x \times 8x = 48x
51 + 189 \div 48x \\ 240 \div 48x \\ 5x
= 5x
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2/5+3/8 5th grade Math. Please help.​
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Answer:

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Step-by-step explanation:

Given expression:

\dfrac{2}{5} + \dfrac{3}{8}

Note: Both fractions must have same denominators if we want to perform addition, subtraction, multiplication, or division.

The only way to simplify this expression is to have a common denominator, which can be determined by the LCM of 5 and 8.

  • ⇒ Multiples of 5: 5, 10, 15, 20, 25, 30, 35, 40, 45...
  • ⇒ Multiples of 8: 8, 16, 24, 32, 40, 48, 56, 64, 72...

Multiply the denominators with such a number that is equivalent to 40.

Note: The number you are multiplying should also be multiplied to the numerator.

\rightarrow \dfrac{2 \times 8}{5 \times 8} + \dfrac{3 \times 5}{8 \times 5}

\rightarrow \dfrac{16}{40} + \dfrac{15}{40}

Finally, simplify the expression to determine the solution.

\rightarrow \dfrac{31}{40}

Since 31 is a prime number, we can't simplify this fraction. Thus, the final answer is 31/40.

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3 years ago
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Juli2301 [7.4K]

Answer: C. 7/33

Step-by-step explanation: First you have to multiply 4/11 to the reciprocal of 12/7. After that you have to simplify 28/132 to 7/33

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4 years ago
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Naomi has earned $51 mowing lawns the past two days. She worked 1 1/2 hours yesterday and 2 3/4 hours today. If Naomi is paid th
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