Answers
I'll show you two methods.
1) Pick two points on the line and use the slope formula.
Look for two points that are easy to read. It is best if the points are on grid line intersections. For example, you can see points (-4, -1) and (0, -2) are easy to read.
Now we use the slope formula.
slope = m = (y2 - y1)/(x2 - x1)
Call one point (x1, y1), and call the other point (x2, y2).
Plug in the x1, x2, y1, y2 values in the formula and simplify the fraction.
Let's call point (-4, -1) point (x1, y1).
Then x1 = -4, and y1 = -1.
Let's call point (0, -2) point (x2, y2).
Then x2 = 0, and y2 = -2.
Plug in values into the formula:
m = (y2 - y1)/(x2 - x1) = (-2 - (-1))/(0 - (-4)) = (-2 + 1)/(0 + 4) = -1/4
The slope is -1/4
2) Pick two points on the graph and use rise over run.
The slope is equal to the rise divided by the run.
Run is how much you go up or down.
Rise is how much you go right or left.
Pick two easy to read points.
We can use the same points we used above, (-4, -1) and (-0, -2).
Start at point (0, -2).
How far up or down do you need to go to get to point (-4, -1)?
Answer: 1 unit up, or +1.
The rise is +1.
Now that we went up 1, how far do you go left or right top go to point (-4, -1)?
Answer: 4 units to the left. Going left is negative, so the run is -4.
Slope = rise/run = +1/-4 = -1/4
As you can see we got the same slope using both methods.
Related Questions
Which best describes the relationship between the successive terms in the sequence shown? 9, –1, –11, –21, … The common difference is –10. The common difference is 10. The common ratio is –9. The common ratio is 9.
Answers
9-10= 1
-1-10= -11
-11-10= -21
common difference means you add and common ratios means you multiply.
hope this helps!
Add. Express your answer in simplest form. 7/10 +1/4 = ? WHAT IS IT I NEED HALP PLEASE
Answers
Decimal Form: 0.95
https://gyazo.com/6c21804636c57ce96be5bf72ef1f31bd
Proof in link
A survey was taken of 100 potential voters, asking them which candidate they would vote for in a local election. The results are given in the table below.
CANDIDATE X Y Z
NUMBER OF SUPPORTERS 63 17 20
If 5000 people vote in the actual election, which is the best prediction for the number of votes for candidate X, based on the results of this poll?
630
850
1000
3150
Answers
So candidate X won 63% of the votes in the poll.
This means that candidate X is expected to win the elections by a percentage close to 63%.
63% of the voters is (63/100)*5000=63*50=3150 voters
Answer: 3150
You can tell if a sequence converges by looking at the first 1000 terms.
a. True
b. False
Answers
Answer:
b. FalseStep-by-step explanation:
A convergent sequence is a sequence that approach to a specific limit. If the sequence doesn't approach to a limit, then it's a divergent sequence.
Now, if we have a sequence apparently convergent where we just analyse the first 1000 terms, that information won't be enough to actually consider the complete sequence as convergent, because those 1000 terms are not representative of the actual limit.
Therefore, the answer is false.
0.05 is 1/10 the value of?
Answers
Answer
0.5
Explanation
0.05 is 1/10 the value of?
In other words the question is asking, what must be multiplied by 1/10 to give 0.05.
let that value be X.
1/10 × X = 0.05
X/10 = 0.05
X = 0.05 × 10
= 0.5
The value that must be multiplied by 1/10 which gives 0.05 would be 0.5.
What is the fundamental principle of multiplication?If an event can occur in m different ways and if following it, a second event can occur in n different ways, then the two events in succession can occur in m × n different ways.
We need to find the value that must be multiplied by 1/10 which gives 0.05.
Let that value be X.
1/10 × X = 0.05
X/10 = 0.05
X = 0.05 × 10
= 0.5
Thus, the value that must be multiplied by 1/10 which gives 0.05 would be 0.5.
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A telephone is 30 feet tall with a diameter of 12 inches. Jacob is making a replica of telephone pole and wants to fill it with sand to help it stand freely. find the volume of his model which has a height of 30 inches and a diameter of 1 inch, to the nearest tenth of a unit use 3.14 for
[tex]\pi[/tex]
Answers
The formula of volume for a cylinder is V = [tex] \pi [/tex] [tex] r^{2} [/tex] h
So you take the diameter and divide it by 2 and you get .5 and then you solve the equation.
So 3.14 x [tex] .5^{2} [/tex] x 30 = 23.6
you roll a number cube twice. what is the probability of rolling a 2 first and then rolling an odd number
Answers
The probability of rolling a 2 on a die and then rolling an odd number on a second roll is 1/12.
The probability of rolling a 2 on a die is 1/6 because there are six sides on a die, each with an equal chance of landing face up. When rolling the dice a second time, there are three odd numbers (1, 3, and 5), so the probability of rolling an odd number is 3/6, or 1/2. To find the combined probability of both events occurring in sequence (rolling a 2 first and then an odd number), we multiply the individual probabilities: (1/6) × (1/2) = 1/12.
The null hypothesis for a chi-square contingency test of independence for two variables always assumes the variables are independent.
a. True
b. False
Answers
The null hypothesis in a chi-square test states independence between variables. There is no relationship between the two of them. The correct option is A) True.
What is the chi-square test?
The chi-square test is a mathematical procedure used to evaluate if there is a significant difference between expected and observed results in one or more categories.
It is a non-parametric test to analyze the differences between categorical variables in the same population.
The test compares real data with expected data if the null hypothesis was true. In this way, the test determines if the difference between observed and expected data are by chance or if this difference is due to a relationship between the involved variables.
This independence test searches for the association between two variables in the same population. It determines the existence or not of independence between two variables.
So the test compares two hypotheses, the null one and the alternative one.
Null hypothesis ⇒ There is no relationship between the two variables. Variables are independent of each other.Alternative hypothesis ⇒ Variables are not independent. There exists a relationship between them.According to this information, we can assume that the statement
The null hypothesis for a chi-square contingency test of independence for two variables always assumes the variables are independent
is true.
Option A is correct. True.
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WILL GIVE BRAINEST
Leo had $91, which is 7 times as much......
Answers
7x=91
7X(Allison's money)=91
S=la+2b solve for a?
Answers
The required simplification of function for the a is given as a = -2b / l + s / l.
Given that,
To simplify the expression S=la + 2b for a.
In mathematics, it deals with numbers of operations according to the statements. There are four major arithmetic operators, addition, subtraction, multiplication and division,
What is simplification?The process in mathematics to operate and interpret the function to make the function or expression simple or more understandable is called simplifying and the process is called simplification.
Here,
s = la + 2b
Transposition of 2b on right side
s - 2b = la
dividing both sides by l
a = s / l - 2b / l
Thus, the required simplification of function for the a is given as a = -2b / l + s / l.
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Find derivative: [5sin(x)]/3 -2x
Answers
The order of operations is not important to solving math problems.
True
or
False
Answers
3-4*2= -5
But not using order of operation:
3-4*2=-1
If you were to try and solve a math problem without following the order of operations, the outcome would be incorrect.
If the ratio of areas of two similar polygons is 25:49, what is the ratio of the corresponding side lengths
Answers
[tex]\bf \cfrac{\textit{similar shape}}{\textit{similar shape}}\qquad \cfrac{s}{s}=\cfrac{\sqrt{s^2}}{\sqrt{s^2}}=\cfrac{\sqrt[3]{s^3}}{\sqrt[3]{s^3}}\\\\ -------------------------------\\\\ \stackrel{\textit{ratio of sides}}{\cfrac{s}{s}}=\stackrel{\textit{ratio of the areas}}{\cfrac{\sqrt{s^2}}{\sqrt{s^2}}}\implies \cfrac{s}{s}=\cfrac{\sqrt{25}}{\sqrt{49}}\implies \cfrac{s}{s}=\cfrac{5}{7}[/tex]
Answer: 5:7
Step-by-step explanation:
The person above is right
I just did the test
Dilate using a scale factor of 2
(2,3) (5,2) (3,-2)
Answers
(2,3) times 2= (4,6)
(5,2) times 2= (10,4)
(3,-2) times 2= (6,-4)
Hope this helps!
Find the given limit lim(x,y)→(a,a)x4−y4x2−y2=lim(x,y)→(a,a) (x^4−y^4)/(x2−y2)= here aa is a constant. (find the limit assuming x≠y)
Answers
[tex]\dfrac{x^4-y^4}{x^2-y^2}=\dfrac{(x^2-y^2)(x^2+y^2)}{x^2-y^2}=x^2+y^2[/tex]
and since this is continuous for all [tex]x\neq y[/tex], the limit as [tex](x,y)\to(a,a)[/tex] will be
[tex]\displaystyle\lim_{(x,y)\to(a,a)}\frac{x^4-y^4}{x^2-y^2}=\lim_{(x,y)\to(a,a)}(x^2+y^2)=2a^2[/tex]
The given limit problem involves factorization of difference of squares. After simplifying, the limit turns out to not exist as the denominator becomes zero while the numerator becomes non-zero. Hence, we end up with an undefined expression.
Explanation:The subject of this question is the calculation of a mathematical limit, a fundamental concept in calculus. The limit equation given is a case of an indeterminate form of type 0/0, which can be solved using the L'Hopital's Rule.
However, before that, we should identify the factorization of (x4 - y4) and (x2 - y2) which are a difference of squares. Therefore, they can be factored as follow: (x4 - y4) = (x2 + y2)(x2 - y2) and (x2 - y2) = (x - y)(x + y).
After canceling out the common factor (x2 - y2), we get the simplified expression (x2 + y2)/(x - y). Now, considering that x≠y, we can substitute x and y with 'a' (since both approach the same value 'a' as per the limit definition), and we obtain (2a)/(0) = ∞ or -∞ based on a's sign. So, in fact, this limit does not exist for x≠y.
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What is the word that means the answer to an addition problem i forgot
Answers
How do you find the x intercepts of 3x^(5/3) - 4x^(7/3)
Answers
3x^(5/3) - 4x^(7/3) = 0. Factor out x^(5/3): x^(5/3) [3 - 4x^(2/3)] = 0
Then either x^(5/3) = 0, or 3 - 4x^(2/3) = 0.
In the latter case, 4x^(2/3) = 3.
To solve this: mult. both sides by x^(-2/3). Then we have
4x^(2/3)x^(-2/3) = 3x^(-2/3), or 4 = 3x^(-2/3). It'd be easier to work with this if we rewrote it as
4 3
--- = --------------------
1 x^(+2/3)
Then
4
--- = x^(-2/3). Then, x^(2/3) = (3/4), and x = (3/4)^(3/2). According to my 3 calculator, that comes out to x = 0.65 (approx.)
Check this result! subst. 0.65 for x in the given equation. Is the equation then true?
My method here was a bit roundabout, and longer than it should have been. Can you think of a more elegant (and shorter) solution?
[tex]\bf 3x^{\frac{5}{3}}-4x^{\frac{7}{3}}=0\implies \stackrel{common~factor}{x^{\frac{5}{3}}}(3-4x^{\frac{2}{3}})=0\\\\ -------------------------------\\\\ x^{\frac{5}{3}}=0\implies \boxed{x=0}\\\\ -------------------------------\\\\ 3-4x^{\frac{2}{3}}=0\implies 3=4x^{\frac{2}{3}}\implies (3)^3=\left(4x^{\frac{2}{3}}\right)^3 \\\\\\ 27=64x^2\implies \cfrac{27}{64}=x^2\implies \sqrt{\cfrac{27}{64}}=x\implies \boxed{\cfrac{3\sqrt{3}}{4\sqrt{4}}=x} \\\\\\ 0.64951905283832898507\approx x[/tex]
seven less than the product of 3 and a number is -16
Answers
If you wanted to answer that you would add 7 to both sides,
which would be
-9 = 3x
Divide both sides by 3
x = -3
The product of three and a number, means you multiply 3 and x where x=the unknown number.
Is -16 means that is is equal to -16.
Let's put it all together.
3x - 7 = -16
If you want to solve for x:
3x - 7 = -16
Add 7 to both sides.
3x = -9
Divide 3 on both sides.
x = -3
Hope this helps!
John must have at least 289 test points to pass his math class. He already has test scores of 72, 78, and 70. Which inequality will tell him at least how many more points he needs to pass the class?
A. 72 + 78 + 70 + x ≤ 289 B. 72 + 78 + 70 + x > 289 C. 72 + 78 + 70 + x < 289 D. 72 + 78 + 70 + x ≥ 289
Answers
John needs to use the inequality 72 + 78 + 70 + x ≥ 289 to determine the minimum number of additional test points required to pass his math class.
Explanation:The student, John, needs to determine how many more test points he requires to pass his math class. Given his current test scores, the inequality to represent this scenario should account for the minimum points he needs to achieve the threshold.
Therefore, the inequality should include an 'at least' condition, meaning the total points must be greater than or equal to the pass mark of 289. Adding his current scores of 72, 78, and 70 gives a total of 220, so the inequality will include an unknown variable, x, which represents the additional points needed. The correct inequality is D. 72 + 78 + 70 + x ≥ 289.
Final answer:
John needs to use the inequality 72 + 78 + 70 + x ≥ 289, which simplifies to x ≥ 69, to determine he requires at least 69 more points to pass. Option D
Explanation:
John needs to determine how many more points he requires to pass his math class, with a target score of at least 289 points. He already has test scores of 72, 78, and 70. To find out the least number of additional points he needs, he should use an inequality that allows for the sum of his scores and an unknown quantity x (representing the points he needs) to be at least as great as 289. This is represented by the inequality 72 + 78 + 70 + x ≥ 289. This can be simplified to x ≥ 69, which means John needs at least 69 more points to pass the class.
Based upon a smaller sample of only 170 st. paulites, what is the probability that the sample proportion will be within of the population proportion (to 4 decimals). probability
Answers
Final answer:
Explanation of sampling distributions and probabilities for different sample sizes in relation to the population proportion in St. Paulites.
Explanation:
In part a, when selecting a sample of 540 St. Paulites, the sampling distribution of p would have a mean of 0.32 and a standard error of 0.0201.
The probability that the sample proportion will be within 0.05 of the population proportion is 0.9871.
In part c, with a sample of 170 St. Paulites, the sampling distribution of p has a mean of 0.32 and a standard error of 0.03145.
The probability that the sample proportion will be within 0.05 of the population proportion is 0.9907.
The gain in precision by taking the larger sample is substantial, with the probability increasing from 0.9907 to 0.9871, reducing the error by a factor of 0.9999.
Olivia started her banking account with $100 and is increasing the account $20 per month. The independent variable
Answers
The independent variable is the amount of months.
Answer:
Wee is the independent variable, and deposit is the dependent variable
Step-by-step explanation:
Given that Olivia started her banking account with $100 and is increasing the account $20 per month.
Here the variable which changes independently is the independent variable
Hence no of weeks elapsed would be the independent variable
The dependent variable would be the variable which changes whenever number of weeks changes.
Here dependent variable is the total balance in the account in a particular week
D=100+20n wbere n= no of weeks that eapsed
and D= depositisin in the bank
Suppose a florist is creating a bouquet with 3 different types of flowers and 3 different types of greenery. If there are 7 types of flowers in the shop and 6 types of greenery to choose from, how many ways can the florist design the bouquet?
Answers
The florist can design the bouquet in 700 unique ways, using 3 different types of flowers and 3 different types of greenery chosen from 7 types of flowers and 6 types of greenery respectively.
Explanation:The subject of this question is within the realm of Mathematics, specifically combinatorics, which studies the various ways in which objects can be selected, arranged, and combined. To find the total number of ways the florist can design the bouquet given 7 types of flowers and 6 types of greenery, we can employ the combination (or 'choose') formula given by n choose r, where n is the total number of objects and r is the number of objects selected. Hence, the number of ways to choose 3 flowers out of 7 is '7 choose 3', and similarly for the greenery we have '6 choose 3'.
Using the formula for combinations, we have:
Combinations of flowers = 7 choose 3 = 7! / (3!(7-3)!) = 35
Combinations of greenery = 6 choose 3 = 6! / (3!(6-3)!) = 20
Since the flowers and the greenery are selected independently of each other, we multiply the two results to get the total number of combinations. Therefore, the number of unique ways in which the florist can design the bouquet is 35 * 20 = 700.
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can someone please help me
Answers
Calculate the perimetet of the quadrilateral
Answers
Perimeter means an outline of a shape. You just need to add all the sides of the quadrilateral.
Perimeter of quadrilateral = [tex]2+2+3+5 = 12cm[/tex]
Hope I helped (:
Have a great day!
At noon, ship A is 170 km west of ship B. Ship A is sailing east at 40 km/h and ship B is sailing north at 20 km/h. How fast is the distance between the ships changing at 4:00 PM?
Answers
At 4:00 PM, the distance between the ships is changing at a rate of 6160 km/h.
Explanation:To find the rate at which the distance between the ships is changing, we can use the concept of relative velocity. At 4:00 PM, ship A has been sailing east for 4 hours, covering a distance of 40 km/h * 4 h = 160 km. Ship B has been sailing north for 4 hours, covering a distance of 20 km/h * 4 h = 80 km.
To find the distance between the ships at 4:00 PM, we can use the Pythagorean theorem. The distance between the ships is the hypotenuse of a right triangle with legs of 170 km and 80 km. Using the theorem, we find that the distance between the ships is √(170^2 + 80^2) ≈ 186.45 km.
To find the rate at which the distance is changing, we can use the derivative of the distance formula. Let D be the distance between the ships. Then, D^2 = (170 + 40t)^2 + (80 + 20t)^2, where t is the time in hours. Taking the derivative of D^2 with respect to t and solving for dD/dt, we get: dD/dt = (170 + 40t)(40) + (80 + 20t)(20).
Substituting t = 4 into the expression, we find that dD/dt = (170 + 40(4))(40) + (80 + 20(4))(20) = 6160 km/h. Therefore, the distance between the ships is changing at a rate of 6160 km/h at 4:00 PM.
Esteban counted the number of steps it took him to walk to school.He counted 1,138 steps.How many steps does he take walking to and from school each day?
Answers
1,138 x 2 = 2,276
Evaluate 3f(2) = .
what does this equal
Answers
Answer:
The answer is 12
Step-by-step explanation:
Find these values.
a.1.1
b.1.1
c.−0.1
d.−0.1
e.2.99 f ) −2.99 g) 1 2 + 1 2 h) 1 2 + 1
Answers
Step-by-step explanation:
How are we expected to find values of the numbers without any other information??
The floor function rounds down decimal or fractional numbers to the nearest integer.
(a) ⌊1.1⌋ = 1
(b) ⌈1.1⌉ = 2
(c) ⌊-0.1⌋ = -1
(d) ⌈-0.1⌉ = 0
(e) ⌈2.99⌉ = 3
(f) ⌈-2.99⌉ = -2
(g) ⌊1/2 + ⌈1/2⌉⌋ = 1
(h) ⌈⌊1/2⌋ + ⌈1/2⌉ + 1/2⌉ = 2
The values enclosed in square brackets represent the floor function, which rounds a decimal number down to the nearest integer. Here are the values for the given expressions:
(a) ⌊1.1⌋ = The floor function ⌊x⌋ rounds down to the nearest integer, so ⌊1.1⌋ = 1.
(b) ⌈1.1⌉ = The ceiling function ⌈x⌉ rounds up to the nearest integer, so ⌈1.1⌉ = 2.
(c) ⌊-0.1⌋ = ⌊x⌋ rounds down to the nearest integer, so ⌊-0.1⌋ = -1.
(d) ⌈-0.1⌉ = ⌈x⌉ rounds up to the nearest integer, so ⌈-0.1⌉ = 0.
(e) ⌈2.99⌉ = ⌈x⌉ rounds up to the nearest integer, so ⌈2.99⌉ = 3.
(f) ⌈-2.99⌉ = ⌈x⌉ rounds up to the nearest integer, so ⌈-2.99⌉ = -2.
(g) ⌊1/2 + ⌈1/2⌉⌋ = ⌊1/2 + 1⌋ = ⌊1.5⌋ = 1.
(h) ⌈⌊1/2⌋ + ⌈1/2⌉ + 1/2⌉ = ⌈0 + 1 + 0.5⌉ = ⌈1.5⌉ = 2.
So, these are the integer values obtained by applying the floor function to the given decimal or fractional numbers, and in some cases, applying it multiple times.
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Que. Find the following values.
(a) ⌊1.1⌋
(b) ⌈1.1⌉
(c) ⌊−0.1⌋
(d) ⌈−0.1⌉
(e) ⌈2.99⌉
(f) ⌈−2.99⌉
(g) ⌊1/2+⌈1/2⌉⌋
(h) ⌈⌊1/2⌋+⌈1/2⌉+1/2⌉
choose a method then find the product 16 * 60
Answers
(10 + 6)60
600 + 360
960
Make a table of ordered pairs for the equation.
y=−1/3x+1
Answers
x = -6, y = −1/3(-6) +1 = 3
x = -3, y = −1/3(-3) +1 = 2
x = 0, y = 1
x = 3, y = −1/3(3) +1 = 0
x = 6, y = −1/3(6) +1 = -1
Table
x y
-6 3
-3 2
0 1
3 0
6 -1
Answer:
The answer is the next table:
x y
0 1
3 0
6 -1
9 -2
Step-by-step explanation:
In order to determine the table with ordered pairs, we have to know about replacing values.
In a linear function, there are two variables, the dependent variable (y) and the independent variable (x). If we replace any value in the "x" variable, we get the "y" value. The process is called "replacing value".
To get the table, we choose some value to replace in the "x" variable:
[tex]x=0\\y=-\frac{1}{3}(0)+1=1\\[/tex]
[tex]x=3\\y=-\frac{1}{3}(3)+1=-1+1=0[/tex]
[tex]x=6\\y=-\frac{1}{3}(6)+1=-2+1=-1[/tex]
[tex]x=9\\y=-\frac{1}{3}(9)+1=-3+1=-2[/tex]
The table with some ordered pairs is:
x y
0 1
3 0
6 -1
9 -2
I have attached an image that shows a graph with the ordered pairs.