Which of the following is the standard form of the equation 5x2 - 20x = 15?

Mathematics

1 answer:

Finger [1]3 years ago

5 0

x= +7 or x=2-7 let me know if you need an explanation <3

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Charlie is watching hot air balloons. Balloon A has risen at a 60° angle. Balloon B has risen at an 82 angle. If the distance fr

Karo-lina-s [1.5K]

Step-by-step explanation:

b is the anwser or 1005 so there u go

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3 years ago

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As the number of pages in a photo book increases, the price of the book also increases. There is an additional shipping charge o

BartSMP [9]

Let the maximum number of pages Jennifer can have be = x

Amount Jennifer has (P) = $62.10

Given equation is :

P = $(20+0.5x)+0.15(20+0.5x)$

Price is given = 62.10 , so equation is :

$62.10=(20+0.5x)+0.15(20+0.5x)$

$62.10=20+0.5x+3+0.075x$

$62.10=23+0.575x$

$0.575x=39.10$

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Hence, Jennifer can have a maximum of 68 pages in her book.

5 0

3 years ago

HELP!!! use cross multiplication

Tresset [83]

Let x be the number of square feet to be mowed
215 square feet take 22 minutes
x square feet take 12 minutes

$22x = 12 \times 215 \\ x = (12 \times 215) \div 22$

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3 years ago

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What is 3 ^9? how to solve?

Tanya [424]

3⁹ is the same as doing:

3 * 3 * 3 * 3 * 3 * 3 * 3 * 3 * 3

What I would do it is narrow it down piece by piece.

3 * 3 * 3 = 27. Do that 3 times, now you are left with:

27 * 27 * 27

27 * 27 or 27² = 729.

That leaves you with:

729 * 27

You can multiply by hand or use a calculator to get your answer of 19683.

To check your answer, plug 3⁹ into a calculator. Your answer should match this.

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3 years ago

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Answer: $8\ hours$