Which polynomial is written in descending order? (2 points) Select one: a. 9 − 3x + 4x2 b. −3x + 9 + 4x2 c. 4x2 − 3x + 9 d. 4x2 + 9 − 3x

Answers

Answer 1

Answer:

Answer:

Option C. (4x² -3x + 9)

Step-by-step explanation:

Arranging a polynomial in descending order means to arrange the powers of variables of each term in the descending order.

So in the given options only Option C. is in the descending order.

4x² - 3x + 9

This polynomial has the variable x² with maximum degree of 2 at the starting.

Then second variable 3x with degree of 1 and then constant term 9.

Option C. is the correct option.

Answer 2

Answer: C.) 4x^2 - 3x + 9 is written in descending order.

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Rachel's cell phone company charges $0.10 per minute . She used 350 minutes last month and paid $84. Write and solve a linear equation to fins what her bill will be if she uses 300 minutes next month .

Answers

300 min = $X
350 min = $84
now cross multiply
350 * x = 300*84
x = 25200/350
x = $72 Answer

how to solve 4n²-3n-7=0

Answers

$4n^2-3n-7=0\n \n a=4, \ \ b=-3 \ \ c=-7\n \n \Delta = b^(2)-4ac = (-3)^(2)-4*4* (-7)= 9+112=121$

$x_(1)=(-b-√(\Delta ))/(2a) =( 3-√( 121))/(2*4)=( 3-11)/(8)= (-8 )/( 8)=-1 \n \nx_(2)=(-b+√(\Delta ))/(2a) =( 3+√( 121))/(2*4)=( 3+11)/(8)= (14 )/( 8)= (7)/(4)=1(3)/(4)$

$4n^2-3n-7=0\n\n\underbrace{(2n)^2-2\cdot2n\cdot(3)/(4)+\left((3)/(4)\right)^2}_((*))-\left((3)/(4)\right)^2=7\n\n(2n-(3)/(4))^2-(9)/(16)=7\n\n(2n-(3)/(4))^2=7+(9)/(16)\n\n(2n-(3)/(4))^2=(112)/(16)+(9)/(16)\n\n(2n-(3)/(4))^2=(121)/(16)\to2n-(3)/(4)=\sqrt(121)/(16)\ \vee\ 2n-(3)/(4)=-\sqrt(121)/(16)$

$2n=(11)/(4)+(3)/(4)\ \vee\ 2n=-(11)/(4)+(3)/(4)\n\n2n=(14)/(4)\ \vee\ 2n=-(8)/(4)\n\n2n=(7)/(2)\ \vee\ 2n=-2\n\nn=(7)/(4)\ \vee\ n=-1$

$(a-b)^2=a^2-2ab+b^2$

How many edges does a cube have?

Answers

A cube has 12 edges ( 4 on top, 4 under and 4 from top to bottom)

You have 7 dogs and you multiply 4 more dogs whats your answer.

Answers

The answer is 28 dogs.

The perimeter of a rectangle is 38 inches. If the length of the rectangle is 14 inches, which equation could be used to find the width, x?

Answers

Perimeter, P = 2*(L + W)

Length, L = 14, Width = x

P = 2*(L + W)

38 = 2*(14 + x).

2*(14 + x) = 38, is the equation used to find x.

Let's go ahead and solve for x, though the question did not ask us to solve it.

14 + x = 38/2

14 + x = 19

x = 19 - 14

x = 5

Width is 5 inches.

Answer: x = 19 - 14

so 5 inch

Step-by-step explanation:

Vertex FormForm looks like?
Can we determine direction? If so, how?
Can we find the y-intercept from this form? If so, how?
Can we find coordinate point for the vertex? If so, how?
Can we identify the axis of symmetry from this form? If so, how?
Can we find the x-intercepts from this form? If so, how?
Any other notes to add?
Convert this equation into vertex form: y = x2 + 6x + 8
Convert this equations into vertex form: f(x) = x2 + 4x - 16

Answers

Can we determine direction?
yes we can.the letter 'a' in the equation of vertex represents if the parabola open upwards or downwards.positive for upward and negative for downward.

Can we find the y-intercept from this form?
Yes we can.Put the value of x=0 and solve for y.

Can we find the x-intercepts from this form
yes we can.Put the whole equation equals zero and solve for x.you will get two values for x and those will be your x-intercepts

Ifyou want to express the vertex form of an equation you have to knowthat the vertex form of a parabola’s equation can be expressed as:y = a(x - h)² + k. The way you know how the parabola will look likeis:

Ifa is positive then the parabola opens upwards like a U.Ifa is a negative number, then the graph will open downwards like anupside down U.

Ihope it helps, Regards.

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