The true statement is,
⇒ The joint frequencies is that twenty-three 9th graders and fifteen 11th graders prefer math.
Now, Based on the given table, the statement that is true about the joint frequencies is that twenty-three 9th graders and fifteen 11th graders prefer math.
Since, The given table shows that in the first column, under the ninth grade row, there are 18 students who prefer math and in the third column, under the 11th grade row, there are 15 students who prefer science.
Hence, There are no joint frequencies given that add up to 23, so the only true statement among the options is the first one.
Thus, The true statement is,
⇒ The joint frequencies is that twenty-three 9th graders and fifteen 11th graders prefer math.
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Answer answer is b dont trust the otha dude
Step-by-step explanation:
(please help quickly!!!!) The number of meters a student swam this week are listed.
250, 500, 500, 650, 700, 700
What is the appropriate measure of variability for the data shown, and what is its value?
The mean is the best measure of variability and equals about 550.
The median is the best measure of variability and equals 575.
The range is the best measure of variability and equals 450.
The IQR is the best measure of variability and equals 200.
Answer:
d
Step-by-step explanation:
took test
Como se resuelve esta ecuación?
Answer:
-33-7x=
[tex] - 33 - 7x = 2(3 - 8x) - 3 [/tex]
[tex] - 33 - 7x = 6 - 16x - 3[/tex]
[tex] - 33 - 6 + 3 = - 16x + 7x[/tex]
[tex] \frac{ - 36}{ - 9 ?} = \frac{ - 9x}{ - 9?} [/tex]
Step-by-step explanation:
x=4
A jar full of marbles is displayed the following table shows the guesses for 10 people. The actual number of marbles in the jar is 145. Calculate the absolute guessing error for all 10 guesses.
Answer:
Step-by-step explanation:
To calculate the absolute guessing error, we need to find the absolute difference between each guess and the actual number of marbles (145).
Guess Absolute Guessing Error
190 45
150 5
125 20
133 12
167 22
160 15
148 3
200 55
170 25
115 30
To check, we can verify that each absolute guessing error is the positive difference between the guess and 145.
Match the system of equations graphed to the correct solution.
infinate solutions (1,1) (-1,2) -1.5,4.5
The solution for each system of equations in this problem is given as follows:
First system: no solution.Second system: (1,1).Third system: (-1.5, 4.5).Fourth system: (-1, 2).How to solve a system of equations?Considering the graph containing the equations for the system, the solution of the system of equations is presented by the point of intersection of all the equations of the system.
When the two curves do not intersect, as is the case for the parallel lines in the first graph in this problem, it is said that the system has no solution.
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NEED HELP ASAP A garden is 6 yards long. How long is the garden in meters? There are
approximately 11 meters in 12 yards. Round your answer to the
nearest tenth.
The garden is approximately 5.5 meters long.
1 yard is approximately 0.91 meters (since 1 meter is approximately 1.094 yards). Therefore, 6 yards is approximately 5.5 meters (6 x 0.91).
Proportionality refers to the relationship between two quantities that change together in a consistent manner. In a proportional relationship, when one quantity changes, the other quantity changes in direct proportion to it.
Since 11 meters is approximately 12 yards, we can set up a proportion:
6 yards = x meters
12 yards = 11 meters
Solving for x, we get:
x = (6 yards)(11 meters/12 yards) = 5.5 meters
Rounding to the nearest tenth, we get that the garden is approximately 5.5 meters long.
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A 30-foot-long support wire for a 16-foot high streetlight runs from the top corner of a building to a point on the ground, forming a straight line. The length of the wire from the top of the building to the top of the street light is 6 feet. How tall is the building?
A. 16 feet
B.20 feet
C. 32 feet
D.48 feet
Answer:
B. 20 feet
Step-by-step explanation:
(30 - 6) = 30 = 16 = x
24 = 30 = 16 = x
4 = 5 = 16 = x
4x = 80
x = 20
An outline of a city in Florida, with measurements in miles (mi) is shown.
0.75 miles
In 2019, there were 60, 500 people in this town. Which of the following is the approximate population density of the city?
A 60 people/mi²
The approximate population density of the city is 1,005 people/mi²
The correct answer choice is option D.
What is population density?Population density can be defined as the number of people in a geographic location at a particular time. It is calculated by dividing the total area of a region by the total number of people that live in that area.
Number of square grids = 107
Land mass = 0.75 miles
Number of people = 60, 500
One square grid = 0.75 × 0.75
= 0.5625 square miles
Total area = Area × Number of square grids
= 0.5625 square miles × 107
= 60.1875 square miles
Population density = Number of people / Total area
= 60,500 /60.1875 square miles
= 1005.192107995846
Approximately,
1,005 people/mi²
Hence, 1,005 people/mi² is the population density of the city.
Complete question:
A. 60 people/mi²
B. 565 people/mi²
C. 754 people/mi²
D. 1,005 people/mi²
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triangle ABC has perimeter 22cm
AB= 8cm
BC=5cm
By calculation, deduce whether triangle ABC is a right angle triangle
Answer: ABC is not a right angled triangle
Step-by-step explanation:
total = 22cm
22-8-5= 9cm
Hypotuneus = 9 cm since its the longest angle
pythagoras theorum = a2+b2=c2
so we need to see if 8² +5² =9²
64+25 need to be 81 (9² )
but its 64+25=89
therefore it is not a right angles triangle.
what is the exponential regression equation to best fit the data where the y values were rounded to the nearest integer. x y 0 2 1 6 2 19 3 56 4 167 question 9 options:
The exponential regression equation to best fit the given data is y = 1.87 * 5.39^x, and this is found by using the logarithmic transformation of the exponential function and linear regression.
To find the exponential regression equation that best fits the given data, we need to use the following formula:
y = ab^x
where a is the y-intercept and b is the base of the exponential function. We can use the logarithmic transformation of this equation to linearize the data:
ln y = ln a + x ln b
We can then use linear regression to find the values of ln a and ln b. Once we have these values, we can use the exponential function to find the best-fit equation.
Using this method, we get the following values:
ln a = 0.6248
ln b = 1.6835
Therefore, the exponential regression equation that best fits the given data is:
y = e^(0.6248) * e^(1.6835x)
This equation can be simplified as:
y = 1.87 * 5.39^x
Note that since the y-values are rounded to the nearest integer, the calculated equation may not perfectly fit the data points, but it will provide a close approximation.
In summary, the exponential regression equation to best fit the given data is y = 1.87 * 5.39^x, and this is found by using the logarithmic transformation of the exponential function and linear regression.
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(T/F) if two non-zero vectors a and b satisfy proja with arrowb = 0 then a and b are parallel.
The statement, "two non-zero vectors "a" and "b" satisfy a×b = 0 then "a" and "b" are parallel" is True, because the cross-product of two vectors is always 0.
The "Cross-Product" of "two-vectors" is zero only when the vectors are parallel or when one (or both) of the vectors is the zero vector. Since a × b = 0 and both "a" and "b" are non-zero, it implies that "a" and "b" are parallel. This is because the cross product of parallel vectors is always zero.
Therefore, the condition a × b = 0 serves as a test for parallelism between non-zero vectors, so the statement is True.
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The given question is incomplete, the complete question is
(T/F) If two non-zero vectors "a" and "b" satisfy a×b = 0 then "a" and "b" are parallel.
if a three-digit number is formed from the digits one through five, using any digit only once, what is the probability that the number will be divisible by 3? express your answer as a common fraction.
The probability that a three-digit number formed from the digits one through five, using any digit only once, will be divisible by 3 is $\frac{2}{5}$.
To find out how many three-digit numbers can be formed using the digits one through five, we first need to determine how many options we have for the first digit. Since the number cannot start with zero, there are four options: 1, 2, 3, or 4. For the second digit, there are only three options left since we cannot repeat the digit we used for the first digit. Finally, for the last digit, there are only two options left. So, in total, there are 4 x 3 x 2 = 24 three-digit numbers that can be formed using the digits one through five.
Now we need to figure out how many of these numbers are divisible by 3. A number is divisible by 3 if the sum of its digits is divisible by 3. The only way to get a sum that is divisible by 3 using the digits one through five is to use three of them (1, 2, 3, 4, or 5). So we need to count the number of three-digit numbers that can be formed using three of the digits 1, 2, 3, 4, and 5. There are 5 ways to choose the digit that is left out, and then 3 x 2 = 6 ways to arrange the other three digits. So there are 5 x 6 = 30 three-digit numbers that can be formed using three of the digits 1, 2, 3, 4, and 5.
Therefore, the probability of selecting a three-digit number that is divisible by 3 is $\frac{30}{24} = \frac{5}{4}$. However, we need to simplify this fraction, so we divide the numerator and denominator by 5 to get $\frac{6}{5}$. Finally, we subtract this fraction from 1 to find the probability that a three-digit number formed from the digits one through five, using any digit only once, will not be divisible by 3: $1 - \frac{6}{5} = \boxed{\frac{2}{5}}$.
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PLEASE HELP!!
The residuals for data set A and data set B were calculated and plotted on separate residual plots. If the residuals for data set A do not form a pattern, and the residuals for data set B form a pattern, what can be concluded?
A. Data set A is linear, and data set B is not linear.
B. Data set A is not linear, and data set B is not linear.
C. Data set A is linear, and data set B is linear.
D. Data set A is not linear, and data set B is linear.
Answer: A
Step-by-step explanation:
When the residuals are random, it implies that the linear fit is appropriate for the data set. When residuals form a pattern, it indicates that the linear fit for the data set is not appropriate since there is a systematic error instead of random error.
Water flows back and forth between a small and large tank. When water is moving into a tank the flow rate is positive, and when water is moving from a tank the flow rate is negative. The large tank begins with 300 gallons of water, and the small tank begins with 200 gallons of water. After a period of 5 minutes, the large tank has the same amount of water as the small tank. Which statement describes the flow rate?
The flow rate of the large tank is 10 gal/min, and the flow rate of the small tank is –10 gal/min.
The flow rate of the large tank is –10 gal/min, and the flow rate of the small tank is 10 gal/min.
The flow rate of the large tank is 20 gal/min, and the flow rate of the small tank is –20 gal/min.
The flow rate of the large tank is –20 gal/min, and the flow rate of the small tank is 20 gal/min.
The correct statement regarding the flow rate is given as follows:
The flow rate of the large tank is –10 gal/min, and the flow rate of the small tank is 10 gal/min.
How to define a linear function?The slope-intercept equation for a linear function is presented as follows:
y = mx + b
The parameters of the definition of the linear function are given as follows:
m is the slope, representing the rate of change of the function.b is the intercept, representing the value of y when the graph of the function crosses the y-axis.The functions are given as follows:
Large tank: V(x) = 300 - mx. (rate of -m).Small tank: V(x) = 200 + mx. (rate of m).After 5 minutes, the two tanks have the same rate, hence the value of m is obtained as follows:
300 - 5m = 200 + 5m
10m = 100
m = 10 gal/min.
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Juan's family took a road trip to the Grand Canyon. Juan fell asleep after they had travelled 177 miles. If the total length of the trip was 300 miles, what percentage of the total trip had they travelled when Juan fell asleep?
When Juan fell asleep, his family had traveled approximately 59% of the total trip to the Grand Canyon.It's important to note that this calculation assumes that the distance traveled is proportional to the progress made in the trip and that no significant detours or changes in speed occurred.
To calculate the percentage of the total trip that Juan's family had traveled when he fell asleep, we need to divide the distance traveled by the total length of the trip and then multiply by 100.
The distance traveled before Juan fell asleep is given as 177 miles, and the total length of the trip is 300 miles.
Percentage = (Distance traveled / Total length of trip) * 100
Substituting the given values, we have:
Percentage = (177 miles / 300 miles) * 100Performing the calculation:
Percentage = (0.59) * 100 = 59%.
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(2) There is a total of 20 balls. Some balls weigh 50g each and others weigh 120g each. If the 20 balls weigh 1560g altogether, how many 50g balls and 120g balls are there respectively?
Number of 50 g weigh balls = 12
And, Number of 120g weigh balls = 8
We have to given that;
There is a total of 20 balls. Some balls weigh 50g each and others weigh 120g each.
Let number of 50 g weigh balls = x
And, Number of 120g weigh balls = y
Hence, We can formulate;
x + y = 20 .. (i)
And, 50x + 120y = 1560
⇒ 5x + 12y = 156 .. (ii)
From (i);
x = 20 - y
Plug in (ii);
5 (20 - y) + 12y = 156
100 - 5y + 12y = 156
7y = 56
y = 8
From (i);
x = 20 - y
x = 20 - 8
x = 12
Thus, number of 50 g weigh balls = 12
And, Number of 120g weigh balls = 8
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. estimate a regression equation for sales as a function of population, advertising in the current year, and advertising in the previous year. can you expect predictions of sales in future years to be very accurate if they are based on this regression equation? explain.
It's also worth noting that there may be other factors that impact sales that are not included in the regression equation. For example, changes in consumer preferences, economic conditions, or competition from other businesses could all have an impact on sales that is not captured by the variables included in the equation.
So while a regression equation can be a useful tool for predicting sales, it's important to keep in mind that it's not a perfect predictor and should be used in conjunction with other information and analysis. To estimate a regression equation for sales as a function of population, advertising in the current year, and advertising in the previous year, you would need to gather data on sales, population, and advertising expenditures for both the current and previous years. Once you have this data, you can use regression analysis to determine how much of the variation in sales can be explained by population and advertising. As for whether or not predictions of sales in future years would be very accurate based on this regression equation, it really depends on how well the equation fits the data.
If the equation has a high R-squared value (meaning that a large percentage of the variation in sales can be explained by the independent variables), then predictions based on the equation are likely to be more accurate. However, if the equation has a low R-squared value, then predictions based on the equation may not be very accurate.
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Tomatoes to total number of carrots and cauliflower tomatoes 19 carat 12 curly flower 15 solve
The total number of carrots and cauliflower is 27, and the number of tomatoes is 19.
Explanation:
Let the number of carrots be c and the number of cauliflower be f.
From the given information, we know that:
c + f = 27 ----(1) (total number of carrots and cauliflower)
19 = tomatoes
We are asked to find the values of c and f. To do this, we can use the equation (1) and substitute 19 for f:
c + 19 = 27
c = 27 - 19
c = 8
Therefore, the number of carrots is 8. To find the number of cauliflower, we can use the equation (1) and substitute the value of c:
8 + f = 27
f = 27 - 8
f = 19
Therefore, the number of cauliflower is 19. Hence, the total number of carrots and cauliflower is:
c + f = 8 + 19 = 27
And the number of tomatoes is:
tomatoes = 19
So, the given information can be summarized as 8 carrots, 19 cauliflower, and 19 tomatoes.
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Kevin has a rectangular prism that was made up of identical cubes, with no gaps between any cubes. The following figure shows the prism and one of the cubes. What was the total number of the cubes used to make up the prism?
The total number of cubes used to make up the rectangular prism can be determined by counting the number of cubes in each dimension and multiplying the values together.
To start, we need to determine the number of cubes in each dimension of the rectangular prism. Looking at the figure, we can see that the length of the rectangular prism is made up of 5 cubes, the width is made up of 3 cubes, and the height is made up of 4 cubes.
Multiplying these values together gives us:
5 x 3 x 4 = 60
Therefore, the total number of cubes used to make up the rectangular prism is 60.
In summary, to find the total number of cubes used to make up a rectangular prism, we need to count the number of cubes in each dimension and multiply them together. In this specific example, the rectangular prism was made up of 5 cubes in length, 3 cubes in width, and 4 cubes in height, resulting in a total of 60 cubes.
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A map of an amusement park is shown on the coordinate plane with the approximate location of several rides.
coordinate plane with points at negative 14 comma 1 labeled Woozy Wheel, negative 6 comma 2 labeled Bumper Boats, negative 2 comma negative 4 labeled Roller Rail, negative 2 comma negative 6 labeled Trolley Train, 2 comma negative 3 labeled Silly Slide, and 6 comma 11 labeled Parachute Plunge
Determine the distance between the Woozy Wheel and the Roller Rail.
119 units
11 units
169 units
13 units
find and sketch the domain of the function. f(x, y) = ln(4 − x2 − 4y2)
The domain of the function is the set of all points in the xy-plane that satisfy the inequality 4 - x^2 - 4y^2 > 0.
The domain of a function consists of all the possible input values that can be plugged into the function to produce a valid output. In the case of the function f(x,y) = ln(4 - x^2 - 4y^2), the argument of the natural logarithm must be positive for the function to be defined. Therefore, we need to find the set of (x,y) pairs that satisfy the inequality:
4 - x^2 - 4y^2 > 0
Rearranging this inequality, we get:
x^2 + 4y^2 < 4
This is the equation of an ellipse centered at the origin with semi-major axis of length 2 and semi-minor axis of length 1/2. Thus, the domain of the function f(x,y) consists of all the points inside this ellipse.
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Draw a picture that shows both the ratio 4:11 and 7:11
The picture showing the ratios 4:11 and 7:11 is attached accordingly.
what is ratio and why is it important?Ratios are common in everyday life and assist to simplify many of our interactions by putting numbers into context. Ratios facilitate the measurement and expression of numbers by making them more understandable. Ratios in everyday life: The automobile was moving at 60 mph, or 60 miles per hour.
A ratio is a comparison expressed as a quotient of two numbers, a and b, and is commonly represented as ab or a/b.
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11. How many combinations of four can you make from the set?
25 baseball cards
Put your answer in the form [XXXXX]. Please do not insert a comma.
VIDEO GAMES Soo Jin is designing a character for a video game using the items in the table. If she selects one item from each of the four categories, how many different possible characters can Soo Jin create?
It's important to note that this calculation assumes that the items in each category are distinct and that Soo Jin can select any item from each category without any restrictions or dependencies.
To determine the number of different possible characters Soo Jin can create for the video game, we need to consider the combinations of items from each category.
Let's assume there are n1 items in Category 1, n2 items in Category 2, n3 items in Category 3, and n4 items in Category 4. To find the total number of possible characters, we multiply the number of options in each category:
Total number of characters = n1 * n2 * n3 * n4
For example, if Category 1 has 5 items, Category 2 has 3 items, Category 3 has 2 items, and Category 4 has 4 items, the total number of possible characters would be:
Total number of characters = 5 * 3 * 2 * 4 = 120
So Soo Jin can create 120 different characters by selecting one item from each of the four categories.
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Craig Rosenberg has a personal injury protection policy that covers each person in, on, around, or under his car for medical expenses as a result of an accident. Each person can collect up to $50,000. Craig is involved in an accident and three people are hurt. One person has$23,000 of medical expenses, one person has $500 worth of medical expenses, and Craig himself has medical expenses totaling$70,000. How much money must the insurance company pay out for these three people?
Based on the policy limit of $50,000, the total amount that the insurance company must pay out for these three people involved in Craig's personal injury protection policy is $73,500.
How is the amount computed?The total amount that the insurance company will indemnify the three persons involved in the accident is determined by the policy or liability limit of $50,000 for each person.
Policy limit in Craig's personal injury protection policy for each = $50,000
The medical expense for the first person = $23,000 (below limit)
The medical expense for the second person = $500 (below limit)
The medical expense for the third person (Craig) = $70,000 (above limit)
Total indemnity = $73,500 ($23,000 + $500 + $50,000)
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The price of a CD radio cassette has been reduced from $16,999 to $13,999 . Calculate the rate of discount
Answer:
The difference between the original price of $16,999 and the discounted price of $13,999 is:
$16,999 - $13,999 = $3,000
So the discount is $3,000.
To calculate the rate of discount as a percentage, you need to divide the discount by the original price, and then multiply by 100.
($3,000 / $16,999) x 100% ≈ 17.65%
Therefore, the rate of discount is approximately 17.65%.
Step-by-step explanation:
Answer:
0.17648 (round to whatever you need) is the RATE of discount
17.648% is the PERCENTAGE of discount
Step-by-step explanation:
(16,999 - 13,999)/ 16,999 = 0.17648
Because of the formula (og price - discount price)/ og price
3. SHORT ANSWER Which point on the number line
is closest to the product of the numbers graphed at
points R and T? Explain your answer.
P
QRST
0
1
The closest point will be 0.6 which is point Q.
To determine the product of the numbers graphed at points R and T, we need to find the coordinates of these points on the number line.
So, point R x point T
= 7/10 x 9/10
However, once you have the coordinates of points R and T, you can multiply the corresponding numbers to find their product.
Then, 0.7 x 0.9
= 0.63
From the points given we can write as
P = 0.4
Q = 0.6
R= 0.7
S = 0.8
T = 0.9
Among all the points the most closest is 0.6 which is point Q.
Thus, the closest point will be 0.6 which is point Q.
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helpppppp i need help with this rn
let A and B be a square matrices of order 3 defined By A={aij}=2i^2+3j and B={bij}=i^2+2j^2. Compute matrices A and B
(b) find the sum of their determinant
(c) 2A^-1
Matric A = [[5, 8, 11],
[11, 14, 17],
[21, 24, 27]]
Matric B = [[3, 9, 19],
[6, 12, 22],
[11, 17, 27]]
(b) The sum of their determinant is 102.
(c) The inverse of matrix A, you can use matrix inversion techniques such as the adjugate matrix or row reduction.
To compute the matrices A and B, we substitute the given expressions for each element into their respective matrices.
Matrix A:
A = [aij] where aij = 2i² + 3j
Substituting the values of i and j from 1 to 3, we get:
A = [[2(1)² + 3(1), 2(1)² + 3(2), 2(1)² + 3(3)],
[2(2)² + 3(1), 2(2)² + 3(2), 2(2)² + 3(3)],
[2(3)² + 3(1), 2(3)² + 3(2), 2(3)² + 3(3)]]
Simplifying each element:
A = [[2 + 3, 2 + 6, 2 + 9],
[8 + 3, 8 + 6, 8 + 9],
[18 + 3, 18 + 6, 18 + 9]]
A = [[5, 8, 11],
[11, 14, 17],
[21, 24, 27]]
Matrix B:
B = [bij] where bij = i² + 2j²
Substituting the values of i and j from 1 to 3, we get:
B = [[1² + 2(1)², 1² + 2(2)², 1² + 2(3)²],
[2² + 2(1)², 2² + 2(2)², 2² + 2(3)²],
[3² + 2(1)², 3² + 2(2)², 3² + 2(3)²]]
Simplifying each element:
B = [[1 + 2, 1 + 8, 1 + 18],
[4 + 2, 4 + 8, 4 + 18],
[9 + 2, 9 + 8, 9 + 18]]
Next, we move on to the remaining parts of the question.
To find the sum of the determinants of matrices A and B, we compute the determinants separately and add them together:
det(A) = |A|
= 5(14 - 17) - 8(11 - 17) + 11(11 - 14)
= -6
det(B) = |B| = 3(12 - 17) - 9(6 - 17) + 19(6 - 12)
= 108
Sum of determinants = det(A) + det(B)
= -6 + 108
= 102
To compute 2A⁻¹, we need to find the inverse of matrix A and multiply it by 2:
A⁻¹ = inverse of matrix A
Once you have the inverse, you can multiply it by 2:
2A^-1 = 2 × A⁻¹
Since matrix A is not given in the question and we've only computed its elements based on the given formula
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I need your Help please this is due on wen but needs to be turned in by 12am or i get a F so i need help with this please and thank you!
Answer: A (300 in^2)
Step-by-step explanation: You can either use volume or the area to find out how much wrapping paper Malia will need. so, I will use the area so I took 2in and mutipyied it by 10in which got me 20in then I took the 20in I got from 2in mutiplied by the 10in and mutipled it by 15 and got the answer of 300 in^2. so the answer is a .
I need some help please, Describe the translation that maps DEF onto JKL
Answer: Translate DEF 2 units to the right
Step-by-step explanation:
Each point in DEF is 2 units to the left of JKL. For example, D is at (-3, 4) and J is at (-1, 4). To map the figures on to one another, DEF must be moved 2 units to the right
