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maw [93]
3 years ago
8

Which expression is equivalent to 2x² + 7x + 4?

Mathematics
1 answer:
Elina [12.6K]3 years ago
7 0

Answer:

none of these

Step-by-step explanation:

2x² + 7x + 4

Factor

We cannot factor this since 2*4 +1 = 9 and we want 7

and 2*2 +2 = 6 and we want 7

and 2*1 +4 = 6 and we want 7

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Three more than the quotient of a number and 5 is equal to 9
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Answer:

The number is 30.

Step-by-step explanation:

x/5+3=9

x/5=9-3

x/5=6

x=6*5

x=30

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Alexxx [7]

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6 0
2 years ago
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solong [7]

Answer:

Amelia rented a DVD and it was due to be returned on 26 November. She actually returned it to the shop on 12 December. The rental shop applies a fine of 9p for every day the DVD is overdue.

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3 years ago
A certain unsavory bar for poker-playing dogs is attended by only two types of dogs: "good dogs" and "bad dogs." For a randomly
SVETLANKA909090 [29]

Answer: The required probability is 0.1923.

Step-by-step explanation:

Since we have given that

Probability that it's a good dog = 0.4

Probability that it's a bad dog = 1-0.4 = 0.6

Probability that the dog smokes given that its a bad dog = 0.7

Probability that it smokes given that its a good dog = 0.25

According to question, probability of smoking pipe would be

P(good).P(Smoking pipe|good)+P(bad).P(smoking pipe|bad)

0.4\times 0.25+0.6\times 0.7\\\\=0.1+0.42\\\\=0.52

So, Probability of getting a good dog given that it is smoking pipe is given by

\dfrac{P(good).P(smoking\ pipe|good)}{P(smoking\ pipe)}\\\\=\dfrac{0.4\times 0.25}{0.52}\\\\=\dfrac{0.1}{0.52}\\\\=0.1923

Hence, the required probability is 0.1923.

3 0
3 years ago
Read 2 more answers
I bought 8 shirts that cost an average of $27. My sister then added 3 shirts. The 11 shirts had a mean cost of 28.50. How much d
Montano1993 [528]
It cost 50 cent each  first i subtracted 27 from 28.50 and it gave me 1.50 de i divided 1.50 by 3 and it gave 50 cent

8 0
3 years ago
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