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Aleks04 [339]
4 years ago
13

Factor completely 49x2 − 81

Mathematics
2 answers:
nataly862011 [7]4 years ago
6 0
49x2 - 81
(7x - 9)(7x + 9)
slava [35]4 years ago
5 0

Answer:

(7x + 9)(7x -9)

Step-by-step explanation:

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Can anyone please solve this question
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3/4 x 3 2/5 - 5/5(find the value of each of the following) ​
Triss [41]

The value of the given expression is \frac{-13}{20}.

Solution:

Given expression is \frac{3}{4} \times3\frac{2}{5}-\frac{5}{5}.

Let us first convert mixed fraction into improper fraction.

3\frac{2}{5}=\frac{(3\times5)+2}{5}=\frac{17}{5}

Substitute this in the given expression.

\frac{3}{4} \times3\frac{2}{5}-\frac{5}{5}=\frac{3}{4} \times\frac{7}{15}-\frac{5}{5}

                  =\frac{21}{60}-\frac{5}{5}

To simplify the above expression, 21 and 60 are cancelled by 3.

                 =\frac{7}{20}-\frac{1}{1}

Do cross multiplication to make the denominator same.

                 =\frac{7}{20}-\frac{20}{20}

                 =\frac{7-20}{20}

                 =\frac{-13}{20}

The value of the given expression is \frac{-13}{20}.

7 0
3 years ago
I will give 50 points
kupik [55]

Answer:

High

Step-by-step explanation:

the only numbers that don't overlap is 53 and 59 all the others would overlap.

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