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ohaa [14]
3 years ago
8

Which expression is equivalent to the given expression?

Mathematics
2 answers:
antiseptic1488 [7]3 years ago
8 0

Answer:

O C.   -4x^2+5x-28

Step-by-step explanation:

3x^2+5x -7(x^2+4)      Distribute

3x^{2} +5x -7x^2-28       Multiply - 7 by 4

3x^2 +5x -7x^2 -28   Combine Like Terms

-4x^2 +5x-28           Final Answer

I am Lyosha [343]3 years ago
6 0

Answer:

C. - 4x^2 + 5x - 4

Step-by-step explanation:

just expand the equation and you'll get C

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Answer: 9x^2 +6

Step-by-step explanation:

f(3x)=(3x)^2 +6=9x^2 +6

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2 years ago
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3 years ago
To estimate the number of people in Springfield, population 10,000, who have a swimming pool in their backyard, 250 people were
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Answer:

2400 people

Step-by-step explanation:

Let x be the number of people who had a swimming pool in the population of 10,000,

Thus, the ratio of people who had swimming pool to the total population = \frac{x}{10000}

Since, out of 250 people 60 had swimming pool,

So, the ratio of the people who had swimming pool to the total population = \frac{60}{250}

\because \frac{x}{10000}=\frac{60}{250}

\implies 250x=600000

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First option is correct.

8 0
3 years ago
Please help 100 points
emmainna [20.7K]

Answer:

Choices A, C, E

Step-by-step explanation:

The prices are proportional, so divide any price by the corresponding number of pounds to find the unit cost.

$1.47/(3 lb) = $0.49/lb

The unit cost is $0.49 per lb.

Now we look in the choices to see which choice has a unit price of $0.49/lb.

We divide each price by its number of pounds to fund each unit cost. Every choice with a unit cost of $0.49/lb is an answer.

A $0.98/(2 lb) = $0.49/lb     Choice A works

B $4.45/(7 lb) = $0.64/lb      Choice B does not work

C $2.94/(6 lb) = $0.49/lb     Choice C works

D $0.54/(1 lb) = $0.54/lb     Choice D does not work

E $3.92/(8 lb) = $0.49/lb     Choice E works

Answer: Choices A, C, E

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Answer:

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