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DiKsa [7]
3 years ago
14

What are the possible number of positive real, negative real, and complex zeros of

Mathematics
2 answers:
Novosadov [1.4K]3 years ago
7 0
<span>f(x) = −7x^4 − 12x^3 + 9x^2 − 17x + 3 you will have to change the signs so,
f(−x) = −7x^4 + 12x^3 + 9x^2 + 17x + 3

For positive roots, count number of times coefficients of f(x) change sign:
− − + − +
3 times -----> 3 or 1 positive roots

For negative roots, count number of times coefficients of f(−x) change sign:
− + + + +
1 time -----> 1 negative root

Positive real: 3 or 1
Negative real: 1
Complex non-real: 0 or 2

The answer is C
</span>
zzz [600]3 years ago
7 0
The answer is C :)
It can be properly explained by others below or above me
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Small boxes contain DVDs, and large boxes contain one gaming machine. Three boxes of gaming machines and a box of DVDs weight 48
miv72 [106K]
DVD weighs 6lbs and game machine weighs 14lbs, so in this case A

in my mind this is what i did...

3(gameMachines) + 5(DVD) = 72lbs
3(gameMachine) + 1 (DVD) = 48lbs

when you subtract, since there is the same number of game machines, they cancel out and your left with
4(DVD) = 24
1 DVD = 6

then just fill in DVD in one of the equations to get the weight of gameMachine
3(gameMachines) + 5(6) = 72lbs
3(gameMachines) = 42
gameMachine = 14
7 0
4 years ago
Read 2 more answers
Help if you know how to do this- brainliestt
Gwar [14]

Answer:

95.5°F

Step-by-step explanation:

Given the regression equation :

y = 1.8x - 76.9 ; the relationship between temperature (°F) and number of ice cream sold

y = number of ice cream sold

x = temperature (°F)

The temperature when 95 iccream cones are sold will be ;

Here, y = 95

Using the model :

95 = 1.8x - 76.9

95 + 76.9 = 1.8x

171.9 = 1.8x

Divide both sides by 1.8

171.9 / 1.8 = x

95.5°F = x

Hence, temperature when 95 cones of ice-cream are sold is 95.5°F

8 0
3 years ago
Ace car rental rents cars for x dollars per day plus y dollars for each time mile driven. Carlos rented a car fir 4 days, drove
kati45 [8]
4x + 160y = 120
and
1x + 240y = 80

that will be be the equations. if we multiply the bottom equation by 4 we get:
4x + 960y = 320

now subtract one equation from another:
4x + 160y = 120
-(4x + 960y = 320)

and get:
-800y = -200
y = $0.25

now plug this into one equation
x +240(.25) = 80
x + 60 = 80
x = $20

so $20 per day and $0.25 per mile
4 0
3 years ago
What is 21 1/4% as a fraction? Please explain as well. I don't understand how to convert this.
NeTakaya
21.25% as a fraction is a pretty easy, but very complex problem to solve. The very first thing I would do is turn the percent to a decimal by simply moving the decimal two spaces to the left, or by dividing by 100. This makes it a lot easier.

21.25% = 0.2125

From here, the decimal reads: two thousand, one hundred and twenty five ten thousandths.

So as a fraction, it is 2125/10000.

Next, we’ll need to reduce this. I would start by dividing by twenty five:
85/400
Divide by five:
17/80

Therefore, your answer is 17/80.
4 0
3 years ago
Select 3 side lengths that can form a right triangle.
sweet [91]

Answer:

16 inches, 63 inches, and 65 inches

Step-by-step explanation:

Edit: I had to change cause it was wrong

6 0
3 years ago
Read 2 more answers
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