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Vika [28.1K]
3 years ago
7

Plz help will mark brainliest ....Given f(x)=5x2−2x and g(x)=3x2+x−4 .

Mathematics
2 answers:
Aleks04 [339]3 years ago
6 0

Answer:  The correct option is (C) 8x^2-x-4.

Step-by-step explanation:  Given two functions f(x) and g(x) as follows :

f(x)=5x^2-2x,\\\\g(x)=3x^2+x-4.

We are to find the value of (f+g)(x).

We have

(f+g)(x)\\\\=f(x)+g(x)\\\\=(5x^2-2x)+(3x^2+x-4)\\\\=5x^2-2x+3x^2+x-4\\\\=8x^2-x-4.

Thus,

(f+g)(x)=8x^2-x-4.

Option (C) is the correct option.

Nataly [62]3 years ago
5 0
It's the 3rd option. All your doing to me, is adding all the numbers straight down. I think you meant to write it like this: 8x² - x - 4
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3 years ago
X=y-7. <br> X+8y=2<br> Hellplpp helllpppp! Plz!
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X= -5/7
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3 years ago
A rectangle has an area of x^2 -6x -7 and a width of x-7 what’s the length
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x+1

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We know that x^2 -6x-7 is the product of two binomials.

We can solve this two ways, but the easier way is to simply factor rather than divide the area by width.

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3 years ago
1. Lucy has a jewelry business. To make a certain necklace, she spends $3.38 on materials and $5.57 on labor. She then sells the
son4ous [18]
<span>(a) $7.04 (b) 704/1599 (c) 0.44 (d) 14 (e) $98.56 (a) How much profit does Lucy earn when she sells a necklace? Since the problem states that her profit is the sale price minus the cost of materials and labor, we have the following equation. P = $15.99 - $3.38 - $5.57 P = $12.61 - $5.57 P = $7.04 So her profit is $7.04 per necklace. (b) Write a fraction of the profit per sale price of the necklace. Record your answer as a fraction using whole numbers. The raw fraction is 7.04/15.99, to get rid of the decimal point, multiply top and bottom by 100, getting 704/1599. The prime factors of 704 are 2,2,2,2,2,2,11 and the prime factors of 1599 are 3,13,41. Since neither 704, nor 1599 share any common factors, the fraction can't be reduced and the final answer is 704/1599. (c) What decimal of every dollar of the sale price of the necklace is profit using the fraction from Part (b)? Pardon the lack of formatting 704/1599 = 0.4403 Rounded to the nearest hundredth gives 0.44 (d) Lucy collected $223.86 selling necklaces at a craft fair. How many necklaces did Lucy sell? Show your work. This question is asking for total cost. So divide the $223.86 by the sale price of $15.99. $223.86 / $15.99 = 14 14 necklaces were sold. (e) How much profit did she earn from the number of necklaces she sold? Show your work. Since we know from (a) that she has $7.04 profit per necklace, just multiply the amount of profit by the number sold. So $7.04 * 14 = $98.56</span>
5 0
3 years ago
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