What are the zeros of f(x)=x^3+2x^2-7x+4? Which statement is true regarding the behavior of the graph of f at each zero
Answers
Answer: (-4,0) , (1,0)
Step-by-step explanation:
I used this website called Desmos it could help with your questions like this.
Answer:
Step-by-step explanation:
f(x)=x³+2x²-7x+4
at x=1
f(1)=1³+2(1)²-7(1)+4=1+2-7+4=0
so x=1 is one zero.
1) 1 2 -7 4
| 1 3 -4
___________
1 3 -4 |0
x²+3x-4=0
x²+4x-x-4=0
x(x+4)-1(x+4)=0
(x+4)(x-1)=0
x=-4,1
zeros are -4,1,1
coefficient of leading term is +
so it starts from bottom on the left at ends up on the right.
There is a cusp at x=1
or it decreases on left of 1 and and increases on the right.
at x=-4 ,it increases.
Related Questions
5th grade math. correct answer will be marked brainliest.
Answers
Answer:
The answer will be 41/14
Step-by-step explanation:
2.928571429
What is the area of the base of the figure
48
45
30
24
Answers
i believe the area is 48 if it's not correct sorry
HELP ITS OVERDUEEE PLEASE PLEASE PLEASE ILL LOVE YOU FOREVER. Suppose that a movie is being filmed. An action shot requires an object to be thrown upward with an initial velocity of 48 feet per second off the top of the plaza, a height of 640 feet. The height h(t) in feet of the object after t seconds is given by the function h(t) = – 16t2 + 48t + 640. Determine how long before the object strikes the ground. (Hint: Let the height,
h(t), be 0 and solve for t.)
Answers
Answer:
the height of the object is and the height at 6 seconds is .
b. the height of the object increases and then decreases.
c. -16(t - 9) (t +4)
i really really really hope this helps
Solve the inequality.
-6n > 54
Answers
Answer:
n < 9
Step-by-step explanation:
Solving an inequality is just like solving an equation, one uses inverse operations. The only difference is that when one multiplies or divides by a negative number, one must remember to flip the inequality sign to ensure that the expression remains true.
[tex]-6 n > 54[/tex]
[tex]/ (-6)[/tex]
[tex]n < 9[/tex]
7 David spent 2 2/5 hours reading on Saturday night. On Sunday, he spent 3 1/5 hours reading. How much time did he spending reading on Saturday and Sunday?* (10 Points) O 54/5 hours A 5 3/5 hours 6 hours 075/5 hours Next
Answers
Answer:
5 and 3/5
Step-by-step explanation:
For this problem, they are asking that we basically sum up the total amount of reading time on Saturday and Sunday. Saturday's reading time is 2 and 2/5, while Sunday's reading time is 3 and 1/5. Add them together to get 5 and 3/5.
Solve:
y = 4x
y = 19 - x
Answers
Answer:
15 is the answerof this question
What is the equation for this line, in Slope Intercept Form (6,1) and (2,-1)
Answers
Answer:
y=1/2x-2
Step-by-step explanation:
m=(y2-y1)/(x2-x1)
m=(-1-1)/(2-6)
m=-2/-4
m=1/2
y-y1=m(x-x1)
y-1=1/2(x-6)
y=1/2x-6/2+1
y=1/2x-3+1
y=1/2x-2
8y-5< 3
Solve the inequality. The solution is _____.
Answers
Answer:
Use Photo Math, it will explain all of the steps
just the answer and I'll give the best rating.
Answers
Answer:
89 i dont know
Step-by-step explanation:
A survey of randomly selected visitors to a mall yielded the following data:
Approved new design for the seating in the food court
Number surveyed
Male
155
254
Female
157
301
Based on this sample, what would be the correct decision and conclusion of a test to determine whether the proportion who approve the design plan for the seating area in the food court is higher for men than it is for women at the 5% level?
a) Reject the null concluding that there is evidence the proportion is higher for men.
b) Reject the null hypothesis concluding that there is no evidence that the proportion is higher for men.
c) Do not reject the null hypothesis concluding that there is evidence that the proportion is higher for men.
d) Reject the null concluding that there is evidence the proportion is higher for women.
e) Do not reject the null hypothesis concluding that there is no evidence that the proportion is higher for men.
Answers
Answer:
The answer is A
Step-by-step explanation:
Reject the null concluding that there is evidence the proportion is higher for men.
Using the z-distribution, as we are working with proportions, it is found that the correct option is:
b) Reject the null hypothesis concluding that there is no evidence that the proportion is higher for men.
What are the hypothesis tested?At the null hypothesis, it is tested if the proportions are the same, that is:
[tex]H_0: p_M - p_W = 0[/tex]
At the alternative hypothesis, it is tested if it is higher for men, that is:
[tex]H_1: p_M - p_W > 0[/tex]
What is the distribution of the difference of proportions?For each sample, we have that:
[tex]p_M = \frac{155}{254} = 0.6102, s_M = \sqrt{\frac{0.6102(0.3898)}{254}} = 0.0306[/tex]
[tex]p_W = \frac{157}{301} = 0.5216, s_W = \sqrt{\frac{0.5216(0.4784)}{301}} = 0.0288[/tex]
Then, for the distribution of differences, the mean and the standard error are given by:
[tex]\overline{p} = p_M - p_W = 0.6102 - 0.5216 = 0.0886[/tex]
[tex]s = \sqrt{s_M^2 + s_W^2} = \sqrt{0.0306^2 + 0.0288^2} = 0.042[/tex]
What is the test statistic?It is given by:
[tex]z = \frac{\overline{p} - p}{s}[/tex]
In which p = 0 is the value tested at the null hypothesis, hence:
[tex]z = \frac{\overline{p} - p}{s}[/tex]
[tex]z = \frac{0.0886 - 0}{0.042}[/tex]
[tex]z = 2.11[/tex]
What is the decision?Considering a right-tailed test, as we are testing if the proportion is higher than a value, with a significance level of 0.05, the critical value is of [tex]z^{\ast} = 1.645[/tex].
Since the test statistic is greater than the critical value for the right-tailed test, there is enough evidence to reject the null hypothesis that the there is no evidence that the proportion is higher for men, hence option b is correct.
More can be learned about the z-distribution at https://brainly.com/question/26454209
1. Marisol is making a pattern with blocks. What might the missing shape be? First, look at the blocks. ? Shape: 1 1 . 2 3 Next, describe Marisol's pattern.
Answers
Answer:
edwardrocks124531
Beginner
2 answers
4 people helped
Answer:
by butthole be icrhingggg jejdhows your day whether are you there bhdhx
Step-by-step explanation:
jshdhdjejsjdjdjfbfhdjdbfbid gregg tea r hurry dragon all see few free add gree d success butt ginn hwdohee fell woman woah bbjdndjdhdbdjfidheuhebdidbdndf
Step-by-step explanation:
Which expression represents the distance between -3 and 5 on the number line?
- 3+5
-3-5
1-3+51
1-3-51
Answers
Answer:
B
Step-by-step explanation:
She decides to use the elimination method to find the solution. She multiplies the second equation by 3 and adds it to the first equation to find 14x = 70, showing her that x = 5. Beyonce finds that y = 4.
Step 1: 3(4x + y = 24) → 12x + 3y = 72
Step 2: 2x – 3y = -2
+ 12x + 3y = 72
14x = 70
14x/14= 70/14 → x = 5
Thinking about this process, Beyonce says out loud, “There are lots of ways I could go about solving this problem. I could do the method above or I could multiply the first equation by -2 and add the second.
Step 1: -2(2x – 3y = -2) → -4x + 6y = 4
Step 2: -4x + 6y = 4
+ 4x + y = 24
7y= 28
7y/7= 28/7 → y = 4
“I seem to find that there is only one solution to the two equations, but I wonder if I will get the same solution if I use a different method?”
If Beyonce uses a different method, would she get the same solution? Be sure to show work or explain your reasoning.
Explain how you know that a system of equations has no solution.
Explain how you know that a system of equations has an infinite number of solutions.
Answers
Answer:
Well it's the same because it's the same problem just worded different it's like saying "May I?" and your sister says "Can I?" It's the same question just different wording.
Logx(x-3)=1 solve for x
Answers
The equation for the circle below is x2 + y2 = 16. What is the length of the
circle's radius?
Answers
Answer:
4
Step-by-step explanation:
The general equation circle is
[tex] {x}^{2} + {y}^{2} = {r}^{2} [/tex]
Where r is the radius
Plug in the equation
[tex] {x}^{2} + {y}^{2} = 16[/tex]
Take the sqr root of 16 tocfind the radius
[tex] \sqrt{16} = 4[/tex]
6TH grade math please help AP EX
Answers
Answer:
I think the 1st one would be 10...
Step-by-step explanation:
Because 12-2=10 and 18-8=10.
If I'm wrong, im super sorry
Triangle XYZ is reflected across the y-axis, and X = (4, –5). What are the coordinates of X’ ?
(–5, 4)
(–4, –5)
(4, 5)
(–4, 5)
Answers
Answer:B
Step-by-step explanation:I looked it up, I don’t copy people’s answers ok don’t flame me in comments.
The coordinates of X in triangle XYZ after reflection across the y axis is X' = (-4, -5)
TransformationTransformation is the movement of a point from its initial location to a new location. Types of transformation are reflection, translation, rotation and dilation
If a point A(x, y) is reflected over the line y axis, the new point is at A'(-x, y).
Triangle XYZ is reflected across the y-axis, and X = (4, –5). Hence X' = (-4, -5)
Find out more on Transformation at: brainly.com/question/1462871
Evaluate 2a-b for a=2 and b=3.
Answers
Answer:
1
Step-by-step explanation:
Help a friend in need
Answers
a) 4.71ft
b) 3.53ft^2
Step-by-step explanation:
Perimeter is 1/2 the circumference
1/2 Circumference = 2*pi*radius
Radius = 1/2 Diameter
Radius = 3/2 = 1.5ft
Circumference = 2*pi*1.5ft = 9.42
1/2 Circumference = 4.71
4.71ft is the perimeter.
The area is 1/2 that of a full circle
A = pi*r^2
A = 3.14*1.5*1.5
A = 7.065ft^2
1/2 A = 3.53ft^2
Help me guys please :(
Answers
hope this helps :)
Giving 13 points!! Help help help
Answers
Answer:
a. 15
b. 27
c. 4
d. 72
e. 2
Step-by-step explanation:
If you need an explanation lmk! happy to help.
24. On the coordinate plane to the right, graph
the inequality 2x +y >1.
Help fast pls
Answers
HELP ASAP! I’m very confused and need help!
Answers
Answer:
I think it's 1 and 7 and 2 and 8.
Step-by-step explanation:
^^
Find the sum: (n + 7) + (n - 14)
Answers
Answer:
2n - 7
Step-by-step explanation:
To get the sum you would combine like terms.
So:
n + n= 2n
7 + -14 = 7 - 14 = -7
Put it together:
2n - 7
Which of the following values for x and y make the equation 4x + 2y + 3 = 19 true?
Answers
A. X=5 4(5)+2y+3=19 y=-7
B.x=4 4(4)+2y+3=19. Y=0
C.x=3 4(3)+2y+3=19 Y=2
D.x=2 4(2)+2y+3=19 y=4
From the calculations the above only the third choice has a similar value of y to the value in calculations
The answer is letter C
PLEASE HELP HELP HELP IMAGE ATTAcHED
Answers
Answer:
is 3
Step-by-step explanation:
because look at the down the trigal and you will see that they pointing at the tree
Answer:
3
Step-by-step explanation:
P(1, 3) ⇒ P'(3, 9)
R(1, 1) ⇒ R'(3, 3)
Q(3, 1) ⇒ Q'(9, 3)
Looking at the points, it appears that the x and y coordinates are being multiplied by 3. Therefore, the scale factor is 3.
Please help! The question is above^
(Ignore the one already selected, it may not even be the right one)
Answers
Write 9/12 as a sum of unit fractions.
Answers
Answer:
9/12 = 1/2 + 1/4
Step-by-step explanation:
This can be done in an unlimited number of ways. Which you choose depends on what you are trying to achieve. Each way will get you the same sum. <33
Which fraction is equivalent to the whole number 8?
A.1/8
B.2/10
C.12/8
D.16/2
Answers
Answer:
D: 16/2
Step-by-step explanation:
you take 16 and divide it by 2 making your answer 8
Rick earned $24 for each car he washed. This month he washed 15 cars. He spent $85 of the money he earned this washing cars and saved the red of the money. How much money did Rick save from the he earned washing cars this month?
Answers
Answer:
$275
Step-by-step explanation:
If you multiply 24 by 15 you get the total which is $360. When you subtract the $85 he spent you get $275 left over that he is saving.