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Pepsi [2]
3 years ago
5

When 21 is subtracted from the square of a number, the result is 4 times the number. Find the positive solution.

Mathematics
1 answer:
wel3 years ago
7 0

Let x = your number.

x^2 - 21 = 4x. Subtract 4x from both sides.

x^2 - 4x - 21 = 0. Factor.

(x - 7) (x + 3) = 0. Set each term to 0.

x + 3 = 0. Subtract 3 from both sides.

x = -3. This is the negative solution.

Set the other term equal to zero.

x - 7 = 0. Add 7 to each side.

x = 7. This is the positive solution.

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Snezhnost [94]

Answer:

Not a true statement.

Step-by-step explanation:

8(6-4)=12

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3 0
2 years ago
Suppose that in a certain sinkhole the ground dropped 69.6 ft in 24 hr. Find the unit rate representing the change in altitude p
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Answer:

2.9 per hour

Step-by-step explanation:

Divide 69.9 by 24

4 0
3 years ago
Начало сказки "Снежная королева" на 20 странице, а конец на 50.
natta225 [31]

If you start on page 20 and end on Page 50, you will have read 31 pages. I just counted from 20 to 50, including the number 20 in it.

OR: You already know there are 50-20=30 pages. But that's without counting the 20 in it. So when you add the extra 20: 30 + 1 = 31

Translated version:

Если вы начнете со страницы 20 и закончите со страницы 50, вы прочтете 31 страницу. Я только что насчитал от 20 до 50, включая число 20 в нем.

ИЛИ: Вы уже знаете, что 50-20 = 30 страниц. Но это без учета 20 в нем. Поэтому, когда вы добавляете дополнительные 20: 30 + 1 = 31

Я использовал Google Translate, поэтому результаты могут быть неточными.

7 0
3 years ago
Is 2x^2+y =3x - 1 a function quadratic
erastovalidia [21]

Answer:

Step-by-step explanation: yes because when rewritten in standard form the x term will still be raised to the 2nd power.

5 0
3 years ago
14. The prime factorization of a number is
NikAS [45]

Answer:

See below.

Step-by-step explanation:

The number = 5 * 7 * 23.

5  * 7 = 35 must therefore also be a factor.

If we divide the number by 35 we get 23!.

4 0
3 years ago
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