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den301095 [7]
3 years ago
10

Hamid published a book of poems. He sold 35 copies in the first week for $10 per copy. He wanted to increase the price of

Mathematics
2 answers:
Veseljchak [2.6K]3 years ago
7 0

Answer:y = -x2 − 2.5x + 350

Step-by-step explanation:

revenue = book price number of copies sold

y = (10 + 0.5x)(35 − 2x)

y = 350 − 20x + 17.5x − x2

y = 350 − 2.5x − x2

y = -x2 − 2.5x + 350

Misha Larkins [42]3 years ago
6 0

Answer:

y = -x^2 − 2.5x + 350

Step-by-step explanation:

y = (10 + 0.5x)(35 − 2x)

y = 350 − 20x + 17.5x − x^2

y = 350 − 2.5x − x^2

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Answer:

25/48

Step-by-step explanation:

You want to multiply the numerators and the denominators

5 * 5 = 25\\\\6 * 8 = 48\\\\25/48

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4 years ago
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Use Pythagorean theorem to find isos
myrzilka [38]

Answer:

x = 12 or \sqrt{144}

Step-by-step explanation:

Find the length of x for one side of the triangle first. To do this, use the Pythagorean Theorem which states: a² + b² = c² or in this case c² - a² = b². c² is 45 and a² is 3*3 or 9. Subtract 45-9 to get 36. Find the square root of 36 to get 6. The opposite side is also going to have a missing side length of 6 so add 6+6 to get 12 as x.

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3 years ago
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Tresset [83]

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3 years ago
What are the explicit equation and domain for an arithmetic sequence with a first term of 5 and a second term of 3?
ioda
In mathematics, number sequences are classified into three types: arithmetic progression, geometric progression and harmonic progression. Arithmetic sequences have a common difference, geometric sequences have a common ration, while harmonic progression is just the reciprocal of the arithmetic progression.

The first term of the arithmetic sequence is 5, followed by three. Therefore, the common difference is, 3-5 = -2. You use these values to the derived formulas for arithmetic progression. One of these formulas is

An = A1 + (n-1)d
where
An is the nth term in the sequence
A1 is the first term of the sequence
n is the totla number of terms within the sequence
d is the common difference.

In this problem, A1 = 5 and d=2. Substituting to the equation,

An = 5 + (-2)(n-1)
An = 5 - 2(n-1), where n should be more than 1. In order for it to become a sequence, it should contain more than one term.

So, the answer is letter D.
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