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3 years ago

Explain why the expression 7x + 5 cannot be factored.

Mathematics

2 answers:

TEA [102]3 years ago

5 0

Because 7x have various beside it and 5 is the constant which you cannot add or multiple them together

guajiro [1.7K]3 years ago

3 0

7 Is a prime factor and ther for it can't be factored to 5 not to mention you dont know what x equals <[( not sure if im right I do know this is a vague answer hopes it helps some what)]>

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Step-by-step explanation:

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3 years ago

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PIT_PIT [208]

Answer:

0.43478

Step-by-step explanation:

From the information given:

$The \ required \ probability = P(1st ball = red) \times P(2nd ball = red) + P(1st ball = red) \times P(2nd ball = white) + P(2nd ball = red) \times P(1st ball = white) + P(1st ball = white) \times P(2nd ball = white)$

$= \dfrac{6}{6+8+10}\times \dfrac{5}{5+8+10} + \dfrac{6}{6+8+10} \times \dfrac{10}{5+8+10} + \dfrac{10}{6+8+10} \times \dfrac{6}{5+8+10} \times \dfrac{10}{6+8+10} \times \dfrac{9}{5+8+9}$

$=(\dfrac{6}{24}\times \dfrac{5}{23})+ (\dfrac{6}{24}\times \dfrac{10}{23}) +( \dfrac{10}{24}\times \dfrac{6}{23} ) + (\dfrac{10}{24}\times \dfrac{9}{23})$

= 0.05434782609 + 0.1086956522 + 0.1086956522 + 0.1630434783

= 0.4347826088

≅ 0.43478

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