Answers
Answer: B
You can find slope by using the slope formula. Because we are already given two coordinate points, we can use that to find our slope. The slope formula is [tex]\frac{y^{2}-y^{1} }{x^{2}-x^{1} }[/tex]. This also refers to [tex]\frac{5-(-5)}{0-4}[/tex] or 10/-4 or -5/2. Any coordinate with the x-value as 0 means that that coordinate is the y-intercept. Because (0,5) has 0 as its x-value, the y-intercept is 5.
Related Questions
Let |r| = 6 at an angle of 30° and |s| = 11 at an angle of 225°. Which expression represents |r – s|?
Answers
The resultant of subtraction of both vectors is
|r - s| = √(r² + s² - 2rscos{15})
What are vectors?A vector is an object that has both a magnitude and a direction.
Given is that |r| = 6 at an angle of 30° and |s| = 11 at an angle of 225°.
For the subtraction of vectors, we can write its magnitude as -
|r - s| = √(r² + s² - 2rscos{15})
Therefore, the resultant of subtraction of both vectors is
|r - s| = √(r² + s² - 2rscos{15})
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Plz help me god blesss you
Answers
Answer:
d. III
Step-by-step explanation:
Quadrants:
In the first quadrant, both x and y are positive, that is, x > 0 and y > 0.
In the second quadrant, y is positive while x is negative, that is, x < 0 and y > 0.
In the third quadrant, both x and y are negative, that is, x < 0 and y < 0.
In the fourth quadrant, x is positive while y is negative, that is, x > 0 and y < 0.
In this question:
x < 0 and y < 0, so third quadrant, and the correct answer is given by option D.
1. The U.S. Energy Information Administration claimed that U.S. residential customers used an average of 10,290 kilowatt hours (kWh) of electricity this year. A local power company believes that residents in their area use more electricity on average than EIA's reported average. To test their claim, the company chooses a random sample of 153 of their customers and calculates that these customers used an average of 10,586kWh of electricity last year. Assuming that the population standard deviation is 2509kWh, is there sufficient evidence to support the power company's claim at the 0.05 level of significance? State the null and alternative hypotheses for the test.
2. The U.S. Energy Information Administration claimed that U.S. residential customers used an average of 10,290 kilowatt hours (kWh) of electricity this year. A local power company believes that residents in their area use more electricity on average than EIA's reported average. To test their claim, the company chooses a random sample of 153 of their customers and calculates that these customers used an average of 10,446 kWh of electricity last year, Assuming that the population standard deviation is 2509 kWh, is there sufficient evidence to support the power company's claim at the 0.02 level of significance? Compute the value of the test statistic.
A. We reject the null hypothesis and conclude that there is insufficient evidence at a 0.02 level of significance to support the power company's claim that the mean amount of electricity for their residents is more than the national average.
B. We fail to reject the null hypothesis and conclude that there is insufficient evidence at a 0.02 level of significance to support the power company claim that the mean amount of electricity for their residents is more than the national average.
C. We reject the null hypothesis and conclude that there is sufficient evidence at a 0.02 level of significance to support the power company's claim that the mean amount of electricity for their residents is more than the national average.
D. We fail to reject the null hypothesis and conclude that there is sufficient evidence at a 0.02 level of significance to support the power company's claim that the mean amount of electricity for their residents is more than the national average.
Answers
Answer:
Kindly check explanation for (1)
2.)
B. We fail to reject the null hypothesis and conclude that there is insufficient evidence at a 0.02 level of significance to support the power company claim that the mean amount of electricity for their residents is more than the national average.
Step-by-step explanation:
1.)
H0 : μ = 10290
H0 : μ > 10290
n = 153, sample mean, xbar = 10586 ; population standard deviation, σ = 2509 ; α = 0.05
Test statistic:
(xbar - μ) ÷ (σ/√(n))
(10586 - 10290) ÷ (2509/√(153))
296 / 202.84062
Test statistic (Z) = 1.46
We obtain the Pvalue :
Decision Region :
Reject H0 ; if Pvalue < α
Pvalue from Z test statistic calculator :
Pvalue = 0.072
Pvalue > α ; Hence, we fail to reject the Null ; there isn't sufficient evidence to support the power company's claim
2.)
H0 : μ = 10290
H0 : μ > 10290
n = 153, sample mean, xbar = 10446 ; population standard deviation, σ = 2509 ; α = 0.02
Test statistic:
(xbar - μ) ÷ (σ/√(n))
(10446 - 10290) ÷ (2509/√(153))
156 / 202.84062
Test statistic (Z) = 0.769
We obtain the Pvalue :
Decision Region :
Reject H0 ; if Pvalue < α
Pvalue from Z test statistic calculator :
Pvalue = 0.221
Pvalue > α ; Hence, we fail to reject the Null ;
B. We fail to reject the null hypothesis and conclude that there is insufficient evidence at a 0.02 level of significance to support the power company claim that the mean amount of electricity for their residents is more than the national average.
Use compositions to determine if the functions below are inverses of
each other?*
f(x) = 5x & F-1(x) = x
Yes
No
Answers
Answer:
They are not inverse functions
Step-by-step explanation:
Given
[tex]f(x) = 5x[/tex]
[tex]f^{-1}(x) = x[/tex]
Required
Determine if both are inverse functions
First calculate the inverse of f(x)
[tex]f(x) = 5x[/tex]
Replace f(x) with y
[tex]y = 5x[/tex]
Swap x and y
[tex]x = 5y[/tex]
Make y the subject
[tex]y = \frac{1}{5}x[/tex]
Replace y with f-1(x)
[tex]f^{-1}(x) = \frac{1}{5}x[/tex]
By comparison:
[tex]f^{-1}(x) = x[/tex] and [tex]f^{-1}(x) = \frac{1}{5}x[/tex] are not the same:
Hence:
[tex]f(x) = 5x[/tex] and [tex]f^{-1}(x) = x[/tex] are not inverse functions
Help I need done quick
Answers
Answer: 160
Step-by-step explanation:
I divided 144/9 to see how many students are their per 10% of the 90% of students and got the answer 16. I then added 16 as the other missing 10% to 144 and got the answer 160.
Find the surface area and volume for this following pyramid
Answers
Answer:
the aswer is A i did this
Step-by-step explanation
You want to install a 1-yd walk around a circular swimming pool. The diameter of the pool is 20 yd. What is the area of the walk?
Answers
Answer:
Area=π*r*r
π=3.14
3.14*20*20=1256
v + 9 over 3= 8
what is v?
Answers
Answer:
I love algebra anyways
the ans is in the picture with the steps
(hope it helps can i plz have brainlist :D hehe)
Step-by-step explanation:
10 points LAST QUESTION :DDDDDD
The Scale factor of Dilation is 3. What will be the four pairs of coordinates for the enlarged image? The center of dilation is 0,0, point of origin.
Answers
Answer:
Step-by-step explanation:
I’ve been stuck on this for about a week, I know it might seem easy but I’m very bad at fractions and my teacher won’t help me
Answers
On solving the provided question we can say that - the increased value in fraction will be [tex]3\frac{1}{4}[/tex]
what is fraction?Any number of equal portions, or fractions, can be used to represent a whole. Fractions in standard English indicate how many units of a certain size there are. 8, 3/4. A whole includes fractions. The ratio of the numerator to the denominator is how numbers are expressed in mathematics. Each of these is an integer in simple fractions. In the numerator or denominator of a complex fraction is a fraction. True fractions have numerators that are less than their denominators. A fraction is a sum that constitutes a portion of a total. By breaking the entire up into smaller bits, you can evaluate it. Half of a full number or item, for instance, is represented as 12.
we have,
initial = [tex]4\frac{5}{6}[/tex]
increased by = [tex]4\frac{1}{4}[/tex]
son difference is = [tex]3\frac{1}{4}[/tex]
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helppp mee nowww plssss
Answers
Answer:
the answer is D, Mars is one of the smallest planets
Mr. Paras sold a portion of his lot to his friend. The lot was 65 meters long and 32 meters
wide. However, part of it measuring 21 meters long and 3 meters wide was donated for
the right of way of his neighbors. What was the area of lot he sold excluding the right of
way?
1. What is the area of the lot that he supposed to sell?
2. What was the area of the donated lot for the right of way?
3. What was the area of the remaining lot that was actually sold?
Please answer it correctly huhu I really need it rn T - T
Answers
Answer:
1. What is the area of the lot that he supposed to sell?
65*32 = 2080 sq. m2. What was the area of the donated lot for the right of way?
21*3 = 63 sq. m3. What was the area of the remaining lot that was actually sold?
2080 - 63 = 2017 sq. mAnswer:
1.2,080 m²
2.63m²
3.2,017
4.25m²
5.81m²
Explanation:
1. A = LW
A = 65 m × 32 m
A = 2,080 m²
2. A = LW
A = 21 m × 3 m
A = 63m²
3. A = 2,080 m² – 63 m²
A = 2,017 m²
4. A = s²
A = (5m)²
A = 25 m²
5.
A = s²
A = (9 m)²
A = 81 m²
6. Which of the following is true about the line given by 8x - 2y = 24?
A) The slope is negative.
B) The y-intercept is negative.
C) The x-intercept is 8.
D) The line does not pass through quadrant III.
Answers
Answer:
B
Step-by-step explanation:
put equation in slope-intercept formula (y=mx+b)
8x-2y=24
-8x -8x
-2y=-8x+24
divide each side by -2
y=4x-12
the "b" in the formula is the y-intercept which is -12, therefore B is correct
there are no good answers on brainly can someone pls answer this
Answers
Answer:
D
Step-by-step explanation:
explanation on the other response on ur other question
Lori works in a restaurant. She earns $7/hr plus tips. If Lori works 4 hours on a Tuesday, has $300 of food sales,
What is her base salary?
What is her Tips (18% of Food-sales) ?
What is her Total earnings?
Answers
Answer: Her total earnings would be $28+$54=$82.
Step-by-step explanation:
Lori's base salary is calculated by multiplying her hourly rate by the number of hours she works. If Lori works 4 hours on a Tuesday and earns $7/hr, her base salary would be 4*$7=$28.
Lori's tips are calculated as 18% of her food sales. If Lori has $300 of food sales on a Tuesday, her tips would be 18%*$300=$54.
Lori's total earnings for the day would be the sum of her base salary and her tips. In this case, her total earnings would be $28+$54=$82.
The order of rotational symmetry of the given figure is
Question 7 options:
A)
7.
B)
5.
C)
6.
D)
8.
Answers
Answer:
A
Step-by-step explanation:
Please help me I don’t understand this at all
Answers
A, C, and D are the answers.
HElp MY BRO NEEDS HELP... again -/
Answers
Answer:
27 cubic units
Step-by-step explanation:
Answer:
[tex]The ~ volume: 27~cubic ~units[/tex] ✔︎
Step-by-step explanation:
[tex](3)(3)(3)[/tex]
[tex]Multiply[/tex]
[tex]so, your~ answer ~will ~be ~27[/tex]
༄✫༄✫༄✫༄✫༄✫༄
hope it helps...
have a great day!!
Danielle is using 2 quarts of water in a recipe. How many cups of water is she using
?
Answers
Answer: 8 cups
Step-by-step explanation:
4 cups to 1 quart, so 2 x 4 = 8
What is the lowest common denominator of the math problem
6/9-2/3=
Answers
Answer:
Answer to 6/9-2/3= 0; Lowest common denominator = 3;
Step-by-step explanation:
You can only reduce 6/9 to 2/3, you cant reduce the fraction any further.
Aponi is a member of the Shoshone Native American Indian
tribe. Her name means "butterfly." Aponi uses beads to make
hair barrettes with a butterfly design. The number of beads she
uses is proportional to the number of hair barrettes she makes.
Aponi graphs a line that shows the number of hair barrettes
she makes and the total number of beads she uses. Two
points on the line are (2, 150) and (5, 375).
What does the slope of the line mean in this situation?
O Aponi uses 45 beads to make each hair barrette.
Aponi uses 75 beads to make each hair barrette.
Aponi uses 150 beads to make each hair barrette.
O Aponi uses 225 beads to make each hair barrette.
Answers
A line that shows the number of hair barrettes she makes and the total number of beads she uses is y = 75x.
What is the graph's line's equation?In order to put the equation in y-intercept (y=mx+b) form and determine the equation of a graphed line, you must first determine the slope and y-intercept. The slope is the ratio of the change in y to the change in x. Find two locations on the line, and then draw a sloping triangle joining them.
What is the name for a straight line?A line is a perfectly straight, one-dimensional figure that extends infinity in both directions and has no thickness. To stress that a line has no "wiggles" anywhere along its length, it is sometimes referred to as a straight line or, more archaically, a right line.
Two points on the line are (2, 150) and (5, 375)
y - 150 = ( (375-150) / (5-2) ) (x-2)
y - 150 = 75 (x-2)
y = 75x
Equation of line is y = 75x
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Help me please !! Please
Answers
Answer:
i believe the last one is right.
Please answer DO NOT PIT LINKS I WILL FIND YOU
Answers
y=5x^2-30x+95=5x^2-30x+45+50=5(x^2-6x+9)+50= (x-3)^2+50
What is the volume of one cylinder ??
Answers
A marine biologist wants to test the effect of water temperature on the length of time sea otters can remain under water during a dive. He gathers data on randomly-selected dives by 7 different otters recording dive duration (in seconds) and water temperature (in degrees Celsius). A computer regression analysis of his data is given below. Assume all conditions for inference for slope have been met. Predictor Coef SE Coef Constant 52.789 5.257 10.04 0.000 Water temp 3.3684 0.4216 7.990 0.002 5.557 R-Sg 92.7% R-Sg (adj ) 91.3% = S =
Which of the following is the estimate of the standard deviation of the sampling distribution of b, the slope of the sample regression line for this relationship?
(a) 0.4216
(b) 0.4216
(c) 5.257
(d) 5.257
(e) 5.557
Which of the following is the best interpretation of the quantity S
(a) The sum of the squared deviations between each observed dive duration and the dive 2.
(b) The sum of the squared deviations between each observed water temperature and the
(c) The average distance between the water temperature for each dive and the mean water
(d) Predictions of dive duration from water temperature based on this regression model will
(e) The average distance between the duration of each dive and the mean dive duration for duration predicted by the regression equation is 5.557 seconds. water temperature predicted by the regression equation is 5.557 seconds. temperature for all the dives in this sample is about 5.557 seconds. be off by an average of about 5.557 seconds. all the dives in this sample is about 5.557 seconds.
Answers
Answer:
b
Step-by-step explanation:
The solution is : 0.4216 is the estimate of the standard deviation of the sampling distribution of b, the slope of the sample regression line for this relationship.
What is standard deviation?A standard deviation (or σ) is a measure of how dispersed the data is in relation to the mean. Low standard deviation means data are clustered around the mean, and high standard deviation indicates data are more spread out.
here, we have,
from the data given
The estimate of the standard deviation of the sampling distribution of b,
( The slope of the sample regression line for the relationship )
= 0.4216
i.e. intersection of SE coef and water temperature )
Testing the effect of water temperature on the length of time sea otters can remain
Hence, The solution is : 0.4216 is the estimate of the standard deviation of the sampling distribution of b, the slope of the sample regression line for this relationship.
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Are x and y proportional when Y /X equals five
Answers
Answer:
no
Step-by-step explanation:
help me fill this out! please be honest and help me , i'll mark you brainlesst
Answers
Answer/Step-by-step explanation:
1. The vertex of am angle is formed when two lines join together. The vertex of the angle shown in the diagram is located outside the circle.(<R)
2. The lines that created <FRT (lines FR & TR) are secants
3. The major arc = FT = 140°
minor arc = QS = 44°
4. Formula of Exterior angles of a circle = (major arc - minor arc)/2
x = (140 - 44)/2
x = 96/2
x = 48°
What is the probability that (enter the probability only, do not round.):
• Exactly 2 are male?
• At least 7 are male?
• None are male?
• Less than 3 are male?
• There are 3 or 4 males?
• At least 1 is male?
Answers
Answer:
7
Step-by-step explanation:
The required probabilities are
• Exactly 2 are male = 0.08
• At least 7 are male = 0.14
• None are male = 0.60
• Less than 3 are male = 0.12
• There are 3 or 4 males = 0.019
• At least 1 is male = 0.04
Probabilities to college reported that 40% of its population is male. Nine students are selected at random.
Probability can be defined as the ratio of favorable outcomes to the total number of events.
For Exactly 2 are male = 2 * 0.04
= 0.08
Similarly,
• At least 7 are male = 0.14
• None are male = 1 -0.40 = 0.60
• Less than 3 are male = 0.12
• There are 3 or 4 males = 0.12 *0.16 = 0.019
• At least 1 is male = 0.04
Thus, the required probability is given above.
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cesar is making a solution for his chenistry class. he puts 3/4 gram sodium chloride and 1/3 gram potassium chloride on the scale. what is the combined mass of the compounds?
Answers
The combined mass of the compounds is 13/12 grams
How to determine the combined mass of the compounds?From the question, we have the following parameters that can be used in our computation:
3/4 gram sodium chloride and 1/3 gram potassium chloride
The combined mass of the compounds is then calculated as
Combined mass = sodium chloride + potassium chloride
Substitute the known values in the above equation, so, we have the following representation
Combined mass = 3/4 + 1/3
Evaluate the sum
Combined mass = 13/12
Hence, the combines mass is 13/12 grams
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Using x as the variable for the problem, solve for x.
PLEASE HELP!!!! Hosting a party for 28 people, you plan to serve pizza for dinner. Each pizza
has 8 slices. How many pizzas must you buy so each guest gets at least 2
slices?
A. x56
B. x 6
C. x27
D. X>7
Answers
Answer:
I'm not sure but I think it's 7
Step-by-step explanation:
28×2= 8x
8÷56=8x÷8
7=x