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Helen [10]
3 years ago
8

Which expressions is equivalent to(2x^2+4x-7)(x-3)

Mathematics
1 answer:
Dafna11 [192]3 years ago
8 0

Answer:

Step-by-step explanation:

(2x^2+4x-7)(x-3)

=(2x2+4x+−7)(x+−3)

=(2x2)(x)+(2x2)(−3)+(4x)(x)+(4x)(−3)+(−7)(x)+(−7)(−3)

=2x3−6x2+4x2−12x−7x+21

=2x3−2x2−19x+21

Good luck honey!

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Hope made 3 different yo-yo's. She used 1 3/4 meters of string for the first yo-yo, 1 meter of string
Nat2105 [25]

Answer:

See explanation

Step-by-step explanation:

Your question is different from the attachment

Statement 1

1 adult + 5 Children

$4 for adult and total of $16 for both adult and children

Let

Cost of children skating = x

The equation is

4 + 5x = 16

Statement 2:

Cost of making a bike bag= $4

Selling price of the bike bag = $5

Profit = $16

Let x = number of bike bag

Profit = selling price - cost price

16 = 5x - 4x

16 = x(5 - 4)

Also written as

(5 - 4)x = 16

Statement 3:

Initial temperature = 16°C

Change in temperature per hour = 4°C

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Let

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Hope made 3 different yo-yos. She used 1 3/4 meters of string for the first yo-yo, 1 meter of string for the second yo-yo, and a total of meters of string 4 1/3

length of first yo-yo = 1 3/4

length of second yo-yo = 1

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Total length = length of first yo-yo + length of second yo-yo + length of third yo-yo

4 1/3 = 1 3/4 + 1 + x

4 1/3 = 2 3/4 + x

4 1/3 - 2 3/4 = x

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x = 1 7/12

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3 years ago
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Answer:

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3 years ago
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