Answer:
[
For ( 5,0 ) , you move 5 units along the x-axis . For ( 0,5 ) , you move 5 units along the y
What are two different ways of factoring -3x - 9? Select all that apply.
A.-3(x + 3)
B.3(x + 3)
C.3(-x - 3)
D.-3(x - 3)
Answer:
The correct answer is A and C.
A research center project involved a survey of 846 internet users. It provided a variety of statistics on internet users. (a) The sample survey showed that 94% of respondents said the internet has been a good thing for them personally. Develop a 95% confidence interval for the proportion of respondents who say the internet has been a good thing for them personally. (Round your answers to four decimal places.) 0.9239 Incorrect: Your answer is incorrect. to 0.9561 Incorrect: Your answer is incorrect. (b) The sample survey showed that 67% of internet users said the internet has generally strengthened their relationship with family and friends. Develop a 95% confidence interval for the proportion of respondents who say the internet has strengthened their relationship with family and friends. (Round your answers to four decimal places.) 0.6385 Incorrect: Your answer is incorrect. to 0.7015 Incorrect: Your answer is incorrect.
Answer:
(a) (0.9240, 0.956)
(b) (0.6383, 0.7017)
Step-by-step explanation:
The number of internet users involved in the survey, n = 846
The percentage of the respondents that said the internet has been good thing for them personally, [tex]\hat p[/tex] = 94%
(a) The confidence interval of a percentage is given as follows;
[tex]CI=\hat{p}\pm z\times \sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}[/tex]
The z-value for 95% confidence interval = 1.96
We get;
[tex]CI=0.94\pm 1.96\times \sqrt{\dfrac{0.94 \times (1-0.94)}{846}} \approx 0.94 \pm 1.6003 \times 10^{-2}[/tex]
CI = 0.9240 ≤ [tex]\hat p[/tex] ≤ 0.956 = (0.9240, 0.956)
(b) The percentage of the internet users that said the internet has directly strengthened their relationship with their families, [tex]\hat p[/tex] = 67% = 0.67
The 95% confidence interval is therefore;
[tex]CI=0.67\pm 1.96\times \sqrt{\dfrac{0.67 \times (1-0.67)}{846}} \approx 0.67 \pm 3.1686\times 10^{-2}[/tex]
From which we have;
CI = 0.6383 ≤ [tex]\hat p[/tex] ≤ 0.7017 = (0.6383, 0.7017)
Find the y-intercept the line on the graph. Plz I need the credit
Answer:
4
Step-by-step explanation:
The y intercept is where it crosses the y axis
It crosses the y axis at y = 4
A cat has a litter of 7 kittens. You plan to adopt 2 of the kittens. In how many ways can you choose 2 of the
kittens from the litter?
There are
different ways you can choose 2 kittens from the litter.
Answer:
Step-by-step explanation:
7P2=7×6=42 ways
Answer: 21
Step-by-step explanation:
Which best describes the domain and range of the function y = 4x"? A) The domain is all real numbers greater than or equal to zero. The range is all real numbers, B) The domain is all real numbers greater than or equal to zero. The range is all real numbers greater than or equal to zero. C) The domain is all real numbers. The range is all real numbers greater than or equal to zero D) The domain is all real numbers. The range is all real numbers.
Answer:
A≈1075.21
d Diameter
37
d
r
r
r
d
d
C
A
Using the formulas
A=
π
r
2
d=
2
r
Solving forA
A=
1
4
π
d
2
=
1
4
π
37
2
≈
1075.21009
Step-by-step explanation:
this is the question I need help with
Answer:
brainllest if right
b
Step-by-step explanation:
please help!!!!!!!!!!!!
Answer:
I think the answer is 16 mm.
Cuanto es la raiz cuadrada 7 x 4 cuando usas la ecuacion de 168?
Answer:
A raiz da equação 2x - 1 = - 3, é: ( U = Z)
Step-by-step explanation:
Cuanto es la raiz cuadrada 7 x 4 cuando usas la ecuacion de 168?
Heres another photo ill
Post the word problem ina minute
To Find :
The area of green shaded region in given image.
Solution :
The area of green shaded region is given by :
Area = Area of outer square - Area of inner rectangle
Area = x² - ( x - 20)×( x - 25 )
Area = x² - ( x² - 25x - 20x + 500 )
Area = 45x - 500
Hence, this is the required solution.
Which expression is equivalent to -x² + 5x + 94 = 13?
A.(x + 7)(x + 12) = 13
C.(x – 12)(x – 7) = 13
b. (x - 12)(x + 7) = 3
d. -(x - 7)(x + 12) = 3
True or false if a set of points all lie on the same plane they are called coplanar
Answer:
True
Step-by-step explanation:
Coplanar points: A group of points that lie in the same plane are coplanar. Any two or three points are always coplanar. Four or more points might or might not be coplanar. The left side of the above figure shows coplanar points A, B, C, and D.
Hope this helps
helppp plzzzzzzzzzzzzz
Answer:
b, the answer is b
Step-by-step explanation:
i can explain later
Answer:
ans: x> -9
Step-by-step explanation:
if you multiply
-2x < 18 by -1 than inequality sign changes as
2x > -18
divide both side by 2 to free 2x to x i.e
2x/2 > (-18/2)
so
x> -9
A student club has 60 members. They want to elect two officers who will serve as the president and the vice president of the club. The club bylaws dictate that the selections be done without replacement and that the first person selected would serve as the president and the second person selected would serve as the vice president. Calculate how many different ways the selections can be made if: a) There is no restriction on who is elected and whoever is elected will accept to serve. (2 Points) b) Two members, say A and B, will accept to serve only if they are elected to serve together. (3 Points)
Answer:
3540
2
Step-by-step explanation:
Total number of members = 60
Number of members to be elected = 2
Since the order of selection matters as the first is president and second is vice president ;
Using the permutation formula :
nPr = n! ÷ (n-r)!
60P2 = 60! ÷ (60 - 2)!
60P2 = 60! ÷ 58!
60P2 = 3540
B.) 2 members A and B will accept to serve only if they are selected to serve together ;
Since only 2 members (president and vice president) are to be chosen ; Hence, only the tow of them (A and B) will be chosen, to do this ;
2P2 = 2! /(2 - 2)! = 2! / 0! = (2*1)/1 = 2
Given mlln, find the value of x.
(x+27)
(2x-7)
Answer:
x=34
Step-by-step explanation:
The angles are corresponding angles so they are equal if m is parallel to n
x+27 = 2x -7
Subtract x from each side
x+27 -x =2x-x-7
27 = x-7
Add 7 to each side
27+7 = x-7+7
34 =x
Evaluate.
-3/7 +7/8
Giver answer in fraction notation.
The numerator is_______.
The denominator is________.
Hint: the numerator isn't 25; I need this ASAP. Thank you☺️
[tex]\implies {\blue {\boxed {\boxed {\purple {\sf {Numerator\:=\:25 }}}}}}[/tex]
[tex]\implies {\blue {\boxed {\boxed {\purple {\sf {Denominator \:=\:56}}}}}}[/tex]
[tex]\large\mathfrak{{\pmb{\underline{\red{Step-by-step\:explanation}}{\red{:}}}}}[/tex]
[tex] \: \frac{ - 3}{7} + \frac{7}{8} [/tex]
Since the denominators are unequal, we find the L.C.M (lowest common multiple) for both denominators.
The L. C. M for 7 and 8 is 56.
Now,
➺[tex] \: \frac{ - 3 \times 8}{7 \times 8} + \frac{7 \times 7}{8 \times 7} [/tex]
➺[tex] \: \frac{ - 24}{56} + \frac{49}{56} [/tex]
Now that the denominators are equal, we can add them.
➺[tex] \: \frac{ - 24 + 49}{56} [/tex]
➺[tex] \: \frac{ 25}{56} [/tex]
Therefore, the numerator is [tex]\boxed{ 25 }[/tex] and the denominator is [tex]\boxed{ 56 }[/tex].
[tex]\large\mathfrak{{\pmb{\underline{\orange{Mystique35 }}{\orange{ヅ}}}}}[/tex]
For all functions of the form f(x) = ax2 + bx + c, which is true when b = 0?
The graph will always have zero x-intercepts.
The function will always have a minimum.
The y-intercept will always be the vertex.
The axis of symmetry will always be positive.
Answer:
C) The y-intercept will always be the vertex.
Step-by-step explanation:
We have the quadratic function in the form:
[tex]f(x)=ax^2+bx+c[/tex]
And we want to determine the true statement when b = 0.
Let's go through each of the choices and examine its validity.
Choice A)
Recall that according to the quadratic formula, the roots of a function is given by:
[tex]\displaystyle x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}[/tex]
If b = 0, then we acquire:
[tex]\displaystyle x=\frac{-(0)\pm\sqrt{(0)^2-4ac}}{2a}=\pm\frac{\sqrt{-4ac}}{2a}[/tex]
As we can see, as long as the inside of the square root is positive, the graph will have x-intercepts. So, b equalling zero does not guarantee that the graph does not have any x-intercepts.
A is false.
Choice B)
A quadratic has a minimum if it curves upwards and a maximum if it curves downwards.
This is decided by the leading coefficient a. b does not affect whether a quadratic curves downwards or upwards.
B is false.
Choice C)
The vertex of a quadratic is given by:
[tex]\displaystyle \text{Vertex}=\left(-\frac{b}{2a}, f\left(-\frac{b}{2a}\right)\right)[/tex]
If b = 0, then the x-coordinate of the vertex is given by:
[tex]\displaystyle x=-\frac{(0)}{2a}=0[/tex]
Then the y-coordinate will be:
[tex]f(0)=a(0)^2+b(0)+c=c[/tex]
So, the vertex is (0, c).
This is also the y-intercept as, by definition, the y-intercept is the value when x = 0.
So, Choice C is the correct choice.
Choice D)
The axis of symmetry is the x-coordinate of the vertex. As we saw earlier, the x-coordinate of the vertex will always be:
[tex]\displaystyle x=-\frac{(0)}{2(a)}=0[/tex]
Zero is neither positive nor negative. Thus, D is false.
Answer:
The y-intercept will always be the vertex.
Step-by-step explanation:
its c
[tex]2x - 4 = 1[/tex]
2x - 4 = 1
2x = 1 + 4
2x = 5
x = 5/2
in the function f(x) = (x+2)2 -3 the minimum value occurs when x is
Answer:
x=2
Step-by-step explanation:
the minimum value of y is when x = 2.
Answer:
The minimum is at x = -2
Step-by-step explanation:
f(x) = (x+2)^2 -3
This is in vertex form
f(x) = ( x-h)^2 +k where (h,k) is the vertex
Since this is an upwards opening parabola the vertex is the minimum
f(x) = (x- -2)^2 -3
The vertex is (-2,-3)
The minimum is at x = -2
Represent 3,4 in number line
Answer:
Please give the context of questions, as it really helps people answer your questions. thanks! n.n
Helllppppppppppppppp
Answer:
4/5
Step-by-step explanation:
I THINK
Answer:
4/10 or 2/5
Step-by-step explanation:
divide 1/2 by 5
Then multiply by 4
John gets 3 Dollars and 12 cents everyday by mowing lawns, but he's been noticing that every time he mows his lawns he get 0.2 more money than he did before that lawn mowing session if John mowes two lawns every day and John starts at 3 Dollars and 12 cents, in 1 week how much money will John have made?
find the LCM of 30,45,60,90
Answer:
180
Step-by-step explanation:
30 = 2 x 3 x 5
45 = 3^2 x 5
60 = 2^2 x 3 x 5
90 = 2 x 3^2 x 5
LCM ( 30, 45, 60, 90 )
= 2^2 x 3^2 x 5
= 4 x 9 x 5
= 180
(a-b)^2 = hihihihihi
Answer:
[tex] {a}^{2} - 2ab + {b}^{2} [/tex]
Step-by-step explanation:
too easy:)
Answer:
a^2 - 2ab + b^2
Step-by-step explanation:
(a-b)^2
(a-b)*(a-b)
(a*a)
(a*-b)
(-b*a)
(-b*-b)
a^2-ba-ba+b^2
a^2-2ba+b^2
For the question "Which binomial is a factor of 9x² – 64?
3x – 8
9x – 32
3x + 32
9x + 8
I got two different answers from the choices: (x + 8)(9x - 8).
What went wrong?
Answer:
3x-8
Step-by-step explanation:
9x²-64 is the same as
(3x)² - 8²
now we have the difference of 2 squares, a²-b² =(a -b)(a +b), where a=3x, b=8
9x²-64 = (3x-8)(3x+8)
PLEASE HELP
Write the equation of the parabola in vertex form.
Answer:
the free
Step-by-step explanation:
Solve for x pls and thank you
Answer:
I think its c but we did this in precal which i failed so no guarantee
Step-by-step explanation:
Answer: B
x = 12.7
Because one is degrees and one is not.
Which of the following systems of equations has many solutions?
1.
2x + 3y = 6
y= 2x + 2
2.
8x - 4y= 12
y=2x-3
.
3
y= 4x + 3
y= 4x - 3
4.
2x + y = 4
-2x - y = 4
Answer:
This is very.....
Step-by-step explanation:
hard
Which of the relationships you listed above will be the most helpful in figuring out the measurements of the safety fences? (2 points)
A triangle has sides with lengths of 11 miles, 16 miles, and 18 miles. Is it a right triangle?
Answer:
no
Step-by-step explanation:
Using the converse of Pythagoras' identity.
If the square of the longest side is equal to the sum of the squares on the other 2 sides then the triangle is right.
longest side = 18, and 18² = 324
11² + 16² = 121 + 256 = 377 ≠ 324
Then triangle is not right.
Round your answer to the nearest hundredth LA
Answer:
Step-by-step explanation:
Since this is a right triangle, we will use a right triangle trig identity to solve our problem. The side opposite the reference angle A is given as 5, and the side adjacent to the reference angle is given as 7. The trig ratio that uses the sides opposite and adjacent is the tangent ratio:
[tex]tanA=\frac{5}{7}[/tex]
Hit the 2nd button on your calculator then the tan button which displays:
[tex]tan^{-1}([/tex]
Enter 5/7 after that open parenthesis and hit = to get that
A = 35.54°