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Setler [38]
3 years ago
6

Is the equation x9 - 5x3 + 6 = 0 quadratic in form? explain why or why not.

Mathematics
2 answers:
Varvara68 [4.7K]3 years ago
6 0

Answer:

Yes.

Step-by-step explanation:

Yes, because we can replace x^3 by another variable, say y:

x^9 - 5x^3 + 6 = 0  

Let x^3 = y, then  we have x^9 = (x^3)^2 = y^2:

y^2 - 5y + 6 = 0  which is quadratic from.

Alexandra [31]3 years ago
5 0

Answer:

The equation is not quadratic in form.

The variable part of the first term is not the square of the variable part of the

second term.

The result of squaring x cubed is x to the 6th power, not the 9th power.

x9(not equal to) (x^3)^2

Step-by-step explanation:

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Ben bought 8 fairy sodas and 5 fairy hotdogs and spent $30.75 fairy dollars. Holly bought 7 fairy sodas and 6 fairy hotdogs and
wlad13 [49]
Set up the system of equations:

8x + 5y = 30.75
7x + 6y = 33

We'll use elimination to solve this system of equations.

Take the coefficients for y in both problems. Multiply one of them by -1:

5 \times -1 = -5

Since this coefficient is taken from the first problem, we'll multiply the entire second problem by this negative coefficient:

(7x + 6y = 33) \times -5 = -35x - 30y = -165

Take the coefficient for y in the second problem and multiply the entire first problem by that coefficient:

(8x + 5y = 30.75) \times 6 = 48x + 30y = 184.50

Your system should now look like this:

48x + 30y = 184.50
-35x - 30y = -165

Combine these two equations to cancel out y:

13x = 19.50

Divide both sides by 5 to get x by itself:

x = 1.5

A fairy soda costs $1.50.

Because we know the value of one of the variables, we can plug it into one of the equations:

8(1.5) + 5y = 30.75
12 + 5y = 30.75

Subtract 12 from both sides:

5y = 18.75

Divide both sides by 5 to get y by itself:

y = 3.75

A fairy hotdog costs $3.75.
6 0
3 years ago
Read 2 more answers
Your car insurance comes due annually and generally costs about $1,500. You decide that you would like to set aside a monthly am
Volgvan

Answer:

$125

Step-by-step explanation:

Since there are 12 months in a year, divide the total bill by the total number of months.

1500/12 = $125

5 0
3 years ago
6r - 7 over 10 = r over 4
Ahat [919]
Multiply both sides by 4

subtract 24r from both sides

simplify r - 24r to -23r

divide both sides by -23

two negatives make a positive

simplify 14/5/23 to 14/5 x 23

simplify 5 x 23 to 115

switch sides

Answer: r = 14/115.
7 0
3 years ago
Which is it? please help me and i will give brainliest
Cerrena [4.2K]

Answer: A, 1/2

Step-by-step explanation:

he is simply using 1 cup of bs for each cup of ws so when you do it its i cup of ws then its hald of 1 bs

3 0
3 years ago
Read 2 more answers
Paul bags of raisin bars in a pan shaped like a rectangle or prism the volume of the pan is 252 in.³ the length of the pants 12
e-lub [12.9K]

Answer:

The height of the pan is 2 inches.

Step-by-step explanation:

Given : Paul bags of raisin bars in a pan shaped like a rectangle or prism the volume of the pan is 252 in.³ the length of the pants 12 inches and it's with is 10\frac{1}{2} inches.

To find : What is the height of the pan ?

Solution :

The volume of a rectangle or prism is

V=l\times w\times h

Where, l=12 inches is the length

w=10\frac{1}{2} inches is the width

V=252 in.³ is the volume

h is the height

Substitute the value,

252=12\times 10\frac{1}{2}\times h

252=12\times \frac{21}{2}\times h

h=\frac{252\times 2}{12\times 21}

h=2

Therefore, the height of the pan is 2 inches.

7 0
2 years ago
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