Answers
Answer:
(2,3),(4,3),(-2,-3),(-4,-3)
Step-by-step explanation:
A function is defined as a relation in which each domain element (x-value) is paired with exactly one range element (y-value).
This means that each value we input for x must have only one possible output. If the same x-value yields more than one y-value, it is not a function.
The correct answer, as shown above, meets the criteria of a function, as each x-value is shown to produce exactly one y-value. In this set of ordered pairs, if x = 2, then y = 3, and if x = -2, then x = -3.
A set of ordered pairs is not a function if there are ordered pairs with the same x-values but different y-values.
In the other sets of ordered pairs, one x-value has more than one possible y-value. Let's use the last set as an example:
(5,1),(5,2),(5,3),(5,4)
Inputting 5 as x produces four different y values; there is no one y value for the x-value. y could equal 1, 2, 3, or 4.
Related Questions
Researchers conducted a study to find out if there is a difference in the use of ereaders by different age groups. randomly selected participants were divided into two age groupsin the to 29year-old group7% of the 628 surveyed use ereaders, while 11of the 2,309 participants 30 years old and older use ereaders(use subscripts let 1 16- to 29-year-old users , and 230 years old and
Answers
No, there is significant difference in the use of e readers by different age groups.
Given sample 1 ( 29 years old) [tex]n_{1}[/tex]=628, [tex]p_{1}[/tex]=7%, sample 2( 30 years old)[tex]n_{2}[/tex]=2309, [tex]p_{2}[/tex]=0.11.
We have to first form hypothesis one null hypothesis and other alternate hypothesis.
[tex]H_{0}:[/tex]π1-π2=0
[tex]H_{1}:[/tex]π1-π2≠0
α=0.05
Difference between proportions [tex]p_{1}-p_{2} =-0.04[/tex]
[tex]p_{d}=0.07-0.11=-0.04[/tex]
The pooled proportion needed to calculate standard error is:
[tex]p=(X_{1} -X_{2} )/(n_{1} +n_{2} )[/tex]
=(44+254)/(628+2309)
=0.10146
The estimated standard error of difference between means is computed using the formula:
[tex]S_{p_{1} -p_{2} }=\sqrt{p(1-p)/m_{1}+p(1-p)/n_{2} }[/tex]
=[tex]\sqrt{0.101*0.899/628+0.101*0.899/2309}[/tex]
=[tex]\sqrt{0.000143+0.00003}[/tex]
=[tex]\sqrt{0.000173}[/tex]
=0.01315
Z= Pd-(π1-π2)/[tex]S_{p_{1} -p_{2} }[/tex]
=-0.04-0/0.013
=-3.0769
This test is a two tailed test so the p value for this test is calculated as (using z table)
p value:2 P(Z<-3.0769)
=2*0.002092
=0.004189
P value< significance level of 5%.
Hence there is enough evidence to show the claim that there is a significant difference in the use of e readers by different age groups.
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Question is incomplete as it also includes:
Significance level of 5%.
PLEASE HELP!!! FINDING PROBABILITY MATH!!!
i need the answer to question 2, 3, and 4. question 1's answer is 9/28 & 32.1%.
Answers
The probability that a person wins the game is 32.1%
How to illustrate the probability?Based on the information given, the following can be depicted. It should be noted that there are 6 sides as well as 4 cards.
Therefore, the numbers on the dice i.e from 1 - 6 will be represented 4 times each. This gives a total of (4 × 6) = 24. There are also 4 cards. The total in sample space will now be:
= 24 + 4 = 28
The frequency table will be such that 28 or more has a relative frequency of 9. Therefore, the probability that a person wins the game will be:
= 9/28 = 32.1%
When you win 25% of the time, this illustrates that the number of products picked will be:
= 25% × 28
= 7 products.
The probability of participants achieving a winning score of 36 or higher in four consecutive attempts will be:
= 1/6⁴
= 1/1296
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What property is (3x+7)+(2x+8)=3x+7+2x+8
Answers
Answer:
distributive property
Step-by-step explanation:
(3x + 7) + (2x + 8)
each of the parenthesis has a multiplier of 1 , placed outside the parenthesis.
then multiplying the terms inside the parenthesis by 1 gives
3x + 7 + 2x + 8
The athletic boosters club at Coral High plans a car wash to raise funds for the sports program. An average of 10 cars per hour are expected to arrive according to a Poisson distribution. They will be served at an average rate of 12 cars per hour, with exponential service times. What is the utilization rate
Answers
The utilization rate is 83.33
The Poisson distribution is a discrete probability distribution that expresses the probability of a given number of events occurring in a fixed interval of time or space if these events occur with a known constant mean rate and independently of the time since the last event.
An average of 10 cars per hour are expected to arrive according to a Poisson distribution. They will be served at an average rate of 12 cars per hour, with exponential service times,
Then, the utilization rate is 83.33.
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In the graph locate the point (3,0) and draw a line parrallel to Y-axis passing through (3,0). Then your line will cut the graph of f (x) at some point, that point's y-coordinate will be your value of f (3)
Answers
The equation of the line passing through the point (3, 0) and parallel to the y axis is x = 3.
What is an equation?An equation is an expression that shows the relationship between two or more variables and numbers.
The graph passes through the point (3, 0) and parallel to the y axis, the equation of this line is x = 3.
The equation of the line passing through the point (3, 0) and parallel to the y axis is x = 3.
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Graph the line with the equation
Answers
The graph of the linear equation can be seen in the image below.
How to graph the linear equation?Here we have the linear equation:
y = (2/5)*x - 6
To graph it, we just need to find two points on the line, and then connect them with a line.
To find the points we just evaluate in two values of x.
if x = 0.
y = (2/5)*0 - 6 = -6
Then we have the point (0, -6)
If x = 5.
y = (2/5)*5 - 6 = 2 - 6 = -4
Then we have the point (5, - 4)
Now we can graph these two points and connect them with a line. The graph of the line can be seen below.
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The total cost, C, for running an advertisement in a local newspaper, The Free Press, is made up of an initial cost of $12 plus a charge of $5 per day. A rival newspaper, The Banner, is currently running a special on advertisements at $8 per day with no initial cost.
a) Write an equation representing the cost in The Free Press.
b) Write an equation representing the cost in The Banner.
c) For each newspaper, create a table of values.
d) Use Geometer’s Sketchpad to graph each cost on the same set of coordinate axes.
e) Which newspaper would you use for an ad that ran 1 day?
f) Which newspaper would you use for an ad that ran 12 days?
Answers
The equation representing the cost in The Free Press is 12 + 5d.
How to depict the equation?The equation representing the cost in The Free Press will be:
= 12 + (5 × d)
= 12 + 5d
The equation representing the cost in The Banner will be:
= 8 × d
= 8d
The table of value for Free Press will be:
1st day = 12
2nd day = 17
3rd day = 22
4th day = 27
5th day = 32
The table of value for the Banner will be:
1st day = 8
2nd day = 16
3rd day = 24
4th day = 32
5th day = 40
The newspaper that will be used to run the advertisement for the first day is Free Press since it's cheaper.
The newspaper that will be used to run the advertisement for twelve days will be:
Free press = 12 + 5d
= 12 + 5(12)
= 12 + 60 = 72
The banner = 8d = 8 × 12 = 96
Therefore, for 12 days, Free Press is cheaper.
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the image of p(m,5-n) when reflected on line y=0 is p'(2m-3,2n-8) find the values of m and n
Answers
The value of m and n that shows that point p(m,5-n) when reflected on line y=0 is m = 3, n = 3.
What is a transformation?Transformation is the movement of a point from its initial point to a new location. Types of transformation are reflection, rotation, translation and dilation.
The rule for the reflection over the line y = 0 (x axis) is (x, y) ⇒ (x, -y)
If the point p(m,5-n) is reflected on line y=0, this would give (m, -(5 - n)) = p'(2m-3,2n-8). Hence:
2m - 3 = m
m = 3
Also:
-(5 - n) = 2n - 8
-5 + n = 2n - 8
n = 3
The value of m and n that shows that point p(m,5-n) when reflected on line y=0 is m = 3, n = 3.
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Select all the correct answers.
A survey found that 50% of teenagers prefer to watch a movie at a theater over other viewing options. You want to know the estimated probability that three out of four randomly chosen teenagers do not prefer watching a movie at a theater. How could you design a simulation for this situation?
Flip a fair coin four times, with heads representing teenagers who prefer watching a movie at a theater and tails representing those who do not.
Pick a card from a deck of standard playing cards four times, with red suits representing those who prefer watching a movie at a theater and black suits representing those who do not.
Spin a spinner with four equal sections three times, with one section representing each person.
Roll a six-sided die four times, with even numbers representing those who prefer watching a movie at a theater and odd numbers representing those who do not.
Generate a set of four numbers using a number generator, with numbers 0 to 5 representing those who prefer watching a movie at a theater and 6 to 9 representing those who do not.
Answers
An equivalent situation, in which the binomial distribution could be used, is given by:
Flip a fair coin four times, with heads representing teenagers who prefer watching a movie at a theater and tails representing those who do not.
What is the binomial distribution formula?The formula is:
[tex]P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}[/tex]
[tex]C_{n,x} = \frac{n!}{x!(n-x)!}[/tex]
The parameters are:
x is the number of successes.n is the number of trials.p is the probability of a success on a single trial.For this problem, the parameters are:
p = 0.5, n = 4;
The other situation that would represent a binomial distribution with the same parameters is given by:
Flip a fair coin four times, with heads representing teenagers who prefer watching a movie at a theater and tails representing those who do not.
The other situations have different values of p, hence they are not equivalent.
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Work out the
circumference of a circle with diameter 1.8 cm.
Take pi to be 3.142 and give your answer to 1 decimal place.
Answers
Step-by-step explanation:
the circumference of a circle is
2×pi×r
with r being the radius, which is always half of the diameter.
r = 1.8 / 2 = 0.9 cm
circumference :
2×pi×0.9 = 1.8×pi = 1.8 × 3.142 = 5.6556 cm ≈ 5.7 cm
Answer:
5.7cm
Step-by-step explanation:
circumference = π · d
(2πr)
{note: "d" is diameter; "r" is radius; "π" is pi}
we know our diameter (d) to be 1.8
let's plug this into our cicumference formula! :
π · d = circumference
(3.142) · (1.8)
3.142 · 1.8 = 5.6556
let's round our answer to 1 decimal place,
remember, if the next digit is ≥5 we round up; < 5 we keep the same
so, our answer is 5.7 cm
hope this helps!! have a lovely day :)
A motor bike depreciated in value from 4500 to 3285. calculate the percentage depreciation
Answers
The percentage depreciation is 27 % .
What is percentage ?
Rather than being expressed as a fraction, a percentage is a piece of a whole expressed as a number between 0 and 100. Nothing is zero percent; everything is 100 percent; half of something is 50 percent; and nothing is zero percent. You divide the part of the whole by the whole and multiply the result by 100 to get the percentage.Given ,
from 4500 to 3285 is depreciation value of a motor bike.
So,
= [tex]\frac{( 4500 - 3285 )} {4500} * 100[/tex]
= [tex]\frac{1215}{4500} * 100\\[/tex]
= [tex]\frac{121500}{4500}[/tex]
= 27 %
Therefore, The percentage depreciation is 27 % .
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Please help!!!!!!!!!!
Answers
Using the together rate, it is found that it will take 18 hours for Erick to build the garden box himself.
What is the together rate?The together rate is given by the sum of each separate rate.
In this problem, the rates are given as follows:
Eric's: 1/x.Drew's: 2/x.Together: 1/6.Hence:
[tex]\frac{1}{x} + \frac{2}{x} = \frac{1}{6}[/tex]
[tex]\frac{3}{x} = \frac{1}{6}[/tex]
x = 18.
Hence, it will take 18 hours for Erick to build the garden box himself.
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Complete the statements below that show y = 8x2 32x 17 being converted to vertex form. factor out the leading coefficient. y = 8(x2 4x) 17 form a perfect-square trinomial. y = 8(x2 4x ) 17
Answers
Hence, the required algebraic expression is 8([tex]x^2[/tex]+4x+4) + 17 -32
What is an expression?expression is a combination of numbers, variables, and functions (such as addition, subtraction, multiplication or division etc.). This math operation can be addition, subtraction, multiplication, or division. The structure of an expression is: Expression is (Number/Variable, Math Operator, Number/Variable)
How to solve?We were given y = 8[tex]x^2[/tex]+32x+17
To convert to vertex form, We factor out the leading coefficient which is 8.
Next, we form a perfect square by adding and subtracting 32 to get,
[tex]y=8(x^2+4x)+8(4)+17-8(4)[/tex]
We factor and combine the first two terms with a common factor of 8
This simplifies to,
8([tex]x^2[/tex]+4x+4) + 17 -32
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Answer:
Answer is y = 8(x2 + 4x +
4
) + 17 +
-32
Step-by-step explanation:
What is part of 1 minute and 5 seconds
Answers
The fraction of 5 seconds in 1 minute or part of 5 seconds in 1 minute is 1/12.
Fraction of 5 seconds in 1 minute
The fraction of 5 seconds in 1 minute or part of 5 seconds in 1 minute is calculated as follows;
1 minute = 60 secs
Fraction = 5 / 60
Fraction = 1/12
Thus, the fraction of 5 seconds in 1 minute or part of 5 seconds in 1 minute is 1/12.
The complete question is below:
What is part of 1 minute is 5 seconds?
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Joe paid $14 for a board game. this is 70% of the original price. what was the original price?
Answers
Step-by-step explanation:
It is given that Joe paid 14.00 for a board game this is 70% of the original price what is the original price.
Let the original price of board game be
X.
x * 70/100 = 14
x * 7/10 = 14
Multiply both sides by 10.
7x = 140
Divide both sides by 7.
x = 20
pleeeaaseee helllppppp!!!!
Answers
Answer:
[tex]sin\theta=\dfrac{1}{2}[/tex]
=============
Given[tex]cos \theta=\dfrac{\sqrt{3} }{2}[/tex]To findThe value of [tex]sin\theta[/tex]SolutionUse identity [tex]sin^2\theta+cos^2\theta=1[/tex] :
[tex]sin^2\theta=1-cos^2\theta[/tex][tex]sin^2\theta=1-(\dfrac{\sqrt{3} }{2} )^2[/tex][tex]sin^2\theta=1-\dfrac{{3} }{4}[/tex][tex]sin^2\theta=\dfrac{{1} }{4}[/tex][tex]sin\theta=\sqrt{\dfrac{{1} }{4} }[/tex][tex]sin\theta={\dfrac{{1} }{2} }[/tex]Solve the following system of equations using elimination by eliminating the y variable
first.
5x + 2y = 3
2x + 3y = 10
Answers
The solution to the system of equations is x = -1 and y = 4
How to solve the system of equations?The system of equations is given as:
5x + 2y = 3
2x + 3y = 10
Multiply the first equation by 2 and the second by 5.
10x + 4y = 6
10x + 15y= 50
Subtract the above equations
10x - 10x + 4y - 15y = 6 - 50
This gives
-11y = -44
Divide by -11
y = 4
Substitute y = 4 in 5x + 2y = 3
5x + 2 * 4 = 3
This gives
5x + 8 = 3
Subtract 8 from both sides
5x = -5
Divide by 5
x = -1
Hence, the solution to the system of equations is x = -1 and y = 4
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A=42°, b=10, c=12. What is the length of a to the nearest tentH
Answers
The length of a in the triangle to the nearest tenth is 8.1 units.
How to find side of a triangle?The side a of the triangle can be found using cosine formula.
Therefore,
a²= b² + c² - 2bc cos A
a² = 10² + 12² - 2 × 10 × 12 cos 42°
a² = 100 + 144 - 240cos 42
a² = 244 - 178.354758115
a = √65.6453
a = 8.10217871933
a = 8.1
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A spinning wheel has the following numbers.
(There are 1-8 numbers in the wheel)
Cathy spins the wheel and tosses a coin simultaneously.
Find the following probabilities:
Getting a 7 and tails.
Getting a prime number and heads.
Getting a number greater than 5 and tails.
Answers
Answer:
[tex]\frac{1}{16}, \frac{1}{4}, \frac{3}{16}[/tex]
Step-by-step explanation:
Recall a probability: [tex]P=\frac{F}{T}[/tex] , where F is a number of favorable outcomes and T is a number of total outcomes.
The probability to get tail is [tex]\frac{1}{2}[/tex] as well as probability to get head.
The probability to choose number 7 of 8 numbers at total is equal to [tex]\frac{1}{8}[/tex].
Therefore, the probability to get number 7 and a tail is:
[tex]\frac{1}{8}\cdot \frac{1}{2}=\frac{1}{16}[/tex]
Prime numbers from 1 to 8 are: 2, 3, 5 and 7, so there are 4 numbers of 8 numbers in total, so the probability to get a prime number is [tex]\frac{4}{8}=\frac{1}{2}[/tex].
The second probability is equal to [tex]\frac{1}{2}\cdot \frac{1}{2}=\frac{1}{4}[/tex].
The numbers greater than 5 are: 6,7,8, so there are 3 numbers of 8 in total, so the probability to get a number greater than 5 is [tex]\frac{3}{8}[/tex].
The third probability is equal to: [tex]\frac{3}{8}\cdot \frac{1}{2}=\frac{3}{16}[/tex].
If the fraction of times an event happened in the past is used as the basis for assigning a probability to the event, this is ______ probability.
Answers
If the fraction of times an event happened in the past is used as the basis for assigning a probability to the event, this is Empirical probability.
If the events are mutually exclusive, special additional rules can be applied. -Additional general rules can be used if the events are not mutually exclusive. Events A and B must be mutually exclusive.
If the occurrence of one event is not completely affected by the occurrence of another event, such an event is probabilistically called an independent event, and the event affected by another event is a dependent event. Is called dependent events.
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Which values of m and b will create a system of equations with no solution? Select two options.
y = mx + b
y = –2x + A system of equations. y equals m x plus b. y equals negative 2 x plus StartFraction 3 over 2 EndFraction.
Answers
Using linear function concepts, a system of equations with no solutions is created when:
[tex]m = -2, b \neq \frac{3}{2}[/tex]
What is a linear function?A linear function is modeled by:
y = mx + b
In which:
m is the slope, which is the rate of change, that is, by how much y changes when x changes by 1.b is the y-intercept, which is the value of y when x = 0, and can also be interpreted as the initial value of the function.The intersection of two lines is the solution of a system of equations. If two lines have the same slope and different intercepts, they will never intercept, that is, the system will not have a solution.
The lines are given as follows:
y = mx + b.y = -2x + 3/2.Hence, for a system with no solution, we need that:
[tex]m = -2, b \neq \frac{3}{2}[/tex]
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If you have 6 cars, but there is only room in your driveway for 3 cars, in how many ways can you arrange the cars in your driveway if: a. Order does not matter. b. Order of the cars matters. c. What is the probability that the three newest cars end up parked in the driveway
Answers
If the order does not matter, cars can be arranged in 20 ways
If an order is important, cars can be arranged in 120 ways
The probability that the three newest cars end up parked in the driveway is 0.167
1. If the order does not matter, combination is used
[tex]\left ({n} \atop {r}} \right.)=\frac{n!}{r!(n-r)!}[/tex]
Here, n=6 r=3
using formula,we get
[tex]\left ( {{6} \atop {3}} \right)=\frac{6!}{3!3!} =5*4=20[/tex]
2. If an order is important, Permutation will be applicable
[tex]^{n}P_{r} = \frac{n!}{(n-r)!} \\[/tex]
∴[tex]^{6} P_{3} =\frac{6!}{3!(6-3)!}=\frac{6!}{3!} =120[/tex]
3. the probability that the three newest cars end up parked in the driveway
P=[tex]\frac{No. of possible outcomes for 3 cars}{total possibilities}[/tex]
=[tex]\frac{6*4*5}{6!}[/tex]
=[tex]\frac{120}{720}[/tex]
=[tex]\frac{1}{6}[/tex] ≈ 0.167
Hence, If the order does not matter, cars can be arranged in 20 ways
If an order is important, cars can be arranged in 120 ways
The probability that the three newest cars end up parked in the driveway is 0.167
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Consider the equality xy=k. Write the following inverse proportion: y is inversely proportional to x. When y = 3, x = 7.
1/7 = k/3
3/1 = k/7
Answers
The correct expression for the inverse proportion is k/7 = 3/1
Inverse proportionsGiven the inequality xy = k
If y is inversely proportional to x, then;
y = k/x
Given that y = 3, and x = 7, then;
3 = k/7
Swap
k/7 = 3
k/7 = 3/1
Hence the correct expression for the inverse proportion is k/7 = 3/1
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2 ⋅ √ 2 + √ 8 - simplify
Answers
Answer:
[tex]4\sqrt2[/tex]
Step-by-step explanation:
[tex]2\sqrt{2} +\sqrt{8}=2\sqrt{2}+2\sqrt{2}=4\sqrt{2}[/tex]
Step-by-step explanation:
i sent the solution in the photo pls check it
Select the correct answer from each drop-down menu.
A toy chest is shown.
TUFFETY
Which shapes best model the parts of the toy chest?
The bottom part of the chest is best modeled by
The top part of the chest is best modeled by
because each face is a
because some faces are
Answers
Answer: What you picked
Step-by-step explanation:
I can't see the dropdown menus, but those answers make sense.
Answer:
The bottom part of the chest is best modeled by rectangular prism because each face is a rectangle The top part of the chest is best modeled by part of a cylinder because some faces are curved
Urgent help please help me!
Answers
Answer:
(x + 4)(x - 2) = x · x
(option L)
Step-by-step explanation:
we know that area = length × width
So, can write out the lengths and widths that we know:
(note: I will use the square as the reference point, because we can simply say "x" for both of its side lengths--you'll see why this is easier later)
Rug A:
length = x
width = x
Rug B:
length: x + 4
(4 feet greater than rug A length)
width: x - 2
(2 feet less than rug A width)
we can now set these areas to be equal to each other:
(rug A) = (rug B)
(length · width of A) = (length · width of B)
(x · x) = [ (x + 4)(x - 2) ]
So, the equation:
(x + 4)(x - 2) = x · x
can be used to find x (the length in feet) of rug A
hope this helps!! have a lovely day :)
how to show that two triangles are congruent
Answers
Answer:
To show that 2 triangles are congruent, both triangles must have the same the same size and shape. Basically both triangles must have the same 3 angles and 3 sides.
Step-by-step explanation:
This means that the corresponding sides are equal and the corresponding angles are equal. We can tell whether two triangles are congruent without testing all the sides and all the angles of the two triangles.
Hope this helped! :D
Answer:
Step-by-step explanation:
Follow this rules
SSS (Side-Side-Side) SAS (Side-Angle-Side) ASA (Angle-Side-Angle) AAS (Angle-Angle-Side)Which relation is a function of x?
O
X
y
-1 7
223
X y
-8 -9
-8
2
1
1
X
-5
-5
-5
-5
8
-4
X
-9
2
y
1
7
-9
2
y
Answers
Answer: Option 4
Step-by-step explanation:
Each value of x maps onto only one value of y.
Use the Law of Cosines to find the specified missing value. Approximate your answer to the nearest tenth.
If B = 150°, a = 150 ft, c = 30 ft, find b.
Answers
Work Shown:
[tex]b^2 = a^2 + c^2 - 2*a*c*\cos(B)\\\\b^2 = 150^2 + 30^2 - 2*150*30*\cos(150)\\\\b^2 \approx 31194.22863406\\\\b \approx \sqrt{31194.22863406}\\\\b \approx 176.618879608211\\\\b \approx 176.6\\\\[/tex]
Which of the following functions best describes this graph?
Answers
Answer:
Option D
Step-by-step explanation:
Looking at the graph each jump is 2 units on the x-axis and y-axis :
We are looking for a quadratic with x values of 3 and 6 when y=0
Solving the last quadratic gives us :
(x-3)(x-6)=0
x = 3 , x = 6
Our answer will be Option D
Hope this helped and have a good day
Answer:
D: [tex]y=x^{2} -9x+18\\[/tex]
Step-by-step explanation:
x intercept of the curve is 3 and 6
meaning that when y=0, x is either 3 or 6
mathematically stated:
0 = (x - 3) (x - 6)
0=x(x-6)-3(x-6)
[tex]0=x^{2} -6x-3x+18\\therefore \ y=x^{2} -9x+18\\[/tex]