Need help ASAP!!
What is the value of the function y=2x−3 when x=−1?
1) −5
2) −1
3) 2
4) 3
Answer:
-5
Step-by-step explanation:
-2-3 is -5 :>
Answer:
y=-5
Step-by-step explanation:
The grade point average6of 20 college enior elected at random from a graduating cla are a
The mean of grade-point averages of 20 college seniors selected at random from a graduating class is 2.50.
What is Mean?Mean is the average of all numbers in the data set. The average can be found by dividing the sum of all numbers in the observed data by the number of data observations. This helps researchers, statisticians, etc. to find mean values in datasets. The formula for calculating the
average is:
mean = sum of values / number of values
It is denoted by X-bar.
We have the grade-point averages of 20 college seniors. The the random sample of graduating class as :
2.2, 1.6 ,2.7, 2.2, 2.4, 2.6, 3.8, 3.0, 2.5, 3.3, 1.8, 2.3, 3.3, 2.8, 2.0, 3.2, 2.1, 2.0, 2.9, 1.3
The Sum of grade point averages of 20 college seniors is calculated as follows,
∑ x = 2.2 + 1.6 + 2.7 + 2.2 + 2.4 + 2.6+ 3.8 + 3.0 + 2.5 + 3.3 + 1.8 + 2.3 + 3.3 + 2.8 + 2.0 + 3.2 + 2.1 + 2.0 + 2.9 + 1.3
∑x = 50
Total number of colleges , n = 20
Mean of distribution is calculated as follows,
X- bar = ∑x / n
where n is number of observations
X- bar = 50/20
=> X-bar = 2.5
Hence, required mean is 2.5 ..
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Complete question:
The grade-point averages of 20 college seniors selected at random from a graduating class are as follows:
2.2, 1.6 ,2.7, 2.2, 2.4, 2.6, 3.8, 3.0, 2.5, 3.3, 1.8, 2.3, 3.3, 2.8, 2.0, 3.2, 2.1, 2.0, 2.9, 1.3 Calculate the mean?
How do you calculate a translation?
Use P′(x+a,y+b) to translate the point P(x,y), a unit to the right, and b unit up. Use P′(x−a,y−b) to translate the point P(x,y), a unit to the left and b unit to the lower.
A translation occurs whenever an object is transported from one place to another without altering its dimension, form, or orientation. We can draw the translation in the coordinate plane if we know which way and how far to move the figure.
The triangle can be translated in the following ways:
Step 1: Find the coordinates of each of the triangle's vertices in step one.
Step 2: Add the horizontal translation value to each vertex's x-coordinate and the vertical translation value to each point's y-coordinate to translate each point. If the horizontal translation is to the left or the vertical translation is downward for these translations, add a negative number.
Step 3: Plot the three translated points and draw the triangle by drawing a straight line between each pair of points.
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What is the relationship between volume of prism and pyramid when their bases and height are the same?
A triangular prism and a triangular pyramid with identical bases and heights are related by the fact that the prism's volume is three times that of the pyramid.
When a pyramid and a prism have bases and heights that are equivalent, the pyramid can fit inside the prism. In reality, when this is the case, the pyramid occupies precisely one-third of the prism's volume. This fact enables us to see a correlation between the volumes of a prism and a pyramid when their bases and heights are equal. That is, a prism with an identical height and base has a volume that is 1/3 that of a pyramid.
Volume of a prism = (area of base) * height Volume of a pyramid = 1/3 (area of the base) * heightTo know more about volume of 3d object click on link below:
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Please help ASAP. I don’t understand the question.
Answer:
Senior citizen ticket: $9
Child ticket: $13
Step-by-step explanation:
This can be solved by creating a system of equations:
[tex]f(x)=7x+5y=128[/tex]
and
[tex]g(x)=8x+10y=202[/tex]
where x is the cost of a senior citizen ticket and y is the cost of a child ticket.
Solve equation 2 for 5y:
[tex]8x+10y=202\\10y=202-8x\\\frac{10y}{x}=\frac{202-8x}{2}\\5y=101-4x[/tex]
Substitute (101-4x) for 5y in equation 1:
[tex]7x+(101-4x)=128\\3x+101=128\\(3x+101)-101=(128)-101\\3x=27\\\frac{3x}{3}=\frac{27}{3}\\x=9[/tex]
Substitute 9 for x in equation 2:
[tex]8(9)+10y=202\\72+10y=202\\(72+10y)-72=(202)-72\\10y=130\\\frac{10y}{10}=\frac{130}{10}\\y=13[/tex]
A senior citizen ticket costs $9 and a child's ticket costs $13.
To check these values, insert them into the equations:
[tex]128=7(9)+5(13)\\128=63+65\\128=128[/tex]
and
[tex]202=8(9)+10(13)\\202=72+130\\202=202[/tex]
What are the required conditions for similarity of triangles?
Required Conditions for similarity of traingles are:-
all the corresponding angles have equal measure or all the corresponding sides are proportional to each other .What are similar traingle?
Triangles with have the same shape but can distinct sizes are said to be similar triangles. In other words, if two triangles are similar,then they need to follow either of the 2 mentioned condition if their corresponding sides are proportionately equal and their corresponding angles are congruent.
Conditions for similarity of traingles are:-
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What does an octagon shape look like?
which expression is equivalent to 179x44?
[tex]179\times44[/tex]
[tex]=\fbox{7876}[/tex]
__________________________________________________________
The following expressions are equivalent to [tex]179\times44[/tex]:
[tex](179 \times 40) + (179 \times 4) = 179 \times(40 + 4)[/tex]
[tex]4000 + 2800 + 360 + 280 +36[/tex]
[tex](100 \times44) + (70\times44) + (9\times44) = 44 \times (100 + 70 +9) = 44 \times 179[/tex]
You have 2 slices of pizza, and I gave you 3 slices of pizza. Can you write the simple expression to find the total number of slices of pizza?
The expression to find the total number of slices of pizza is 2 + 3
How to determine the expression to find the total number of slices of pizza?From the question, we have the following parameters that can be used in our computation:
Initial slices of pizza = 2
Additional slices of pizza = 3
This means that
The expression to find the total number of slices of pizza is
Total number of slices of pizza = Initial slices of pizza + Additional slices of pizza
Substitute the known values in the above equation, so, we have the following representation
Total number of slices of pizza = 2 + 3
Hence, the expression is 2 + 3
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if there are 3 numerical predictors and one categorical variable with 4 levels, how many models with interactions do we have to consider to find the one with the lowest aic?
By using Akaike Information Criterion(AIC) to compare various models , We need to consider 16 models to find the one with lowest AIC.
What do you mean by statistics?The study of statistics focuses on gathering, organizing, organizing, analyzing, interpreting, and presenting data.
What is AIC and it's formula?A mathematical tool for assessing how well a model matches the data it was derived from is the Akaike information criterion (AIC).
It's formula is:
AIC=2k-2ln(L)
predictors=independent variables=3
k=independent variables+1=4
Categorical variable= 4 levels
Total number of models to be considered = 4 * 4 =16
Since, Every layer (characteristics of variable) must interact with the predictors variable to calculate AIC and find the lowest one.
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What do 14 and 18 have in common?
How do you find the inverse of a 2x2 function?
The matrix will not have an inverse if the determinant is 0; in this case, it is referred to as singular.
What is the inverse function?An inverse function is a function that gives back the initial value for which an output was provided by another function. The inverse function of y, or [tex]f^{-1}(y)[/tex], will return the value x if f(x) is a function that produces the value y.
Put negatives in front of b and c, swap the locations of a and d, then divide the result by the determinant to determine the inverse of a 2×2 matrix (ad-bc).
Not every matrix of size 2 by 2 has an inverse matrix. The matrix will not have an inverse if the determinant is 0; in this case, it is referred to as singular. Inverses exist only for non-singular matrices.
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Put negatives in front of b and c, swap the locations of a and d, then divide the result by the determinant to determine the inverse of a 2x2 matrix (ad-bc).
What is inverse function?A function known as an inverse function returns the beginning value for which an output was produced by another function. If f(x) is a function that yields the value y, then will return the value x when used as the inverse function of y, or.To find the inverse of a 22 matrix, place negatives in front of b and c, swap a and d's positions, then divide the outcome by the determinant (ad-bc).There isn't always an inverse matrix for a matrix of size 2 by 2. If the determinant is 0, the matrix will not be singular and will not have an inverse. Only matrices that are not singular have inverses.Hence, Put negatives in front of b and c, swap the locations of a and d, then divide the result by the determinant to determine the inverse of a 2x2 matrix (ad-bc).
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Find area of the fig.
The area of the composite figures are as follows;
10. Area of the trapezoids are; 96 cm², 80 cm², 96 cm², 80 cm²
Area of the rectangle at the center = 320 cm²
11. Area of the field on the left is 18,600 m²
Area of the field on the right is 11,000 m²
What is a composite figure?A composite figure is a figure that consists of two or more regular shapes.
10. The width of each trapezoid are;
(28 - 20)/2 = 4
(24 - 16)/2 = 4
The area of each trapezoid are;
The area of each of the left and right trapezoid = 4 × (20 cm + 28 cm)/2 = 96 cm²
Area of the top and bottom trapezoid = 4 × (16 cm + 24 cm)/2 = 80 cm²
Area of the rectangle at the center = 16 cm × 20 cm = 320 cm²
11. Area of ΔDEI = 0.5 × 80 m × 60 m = 2400 m²
Area of trapezoid EIGF = 0.5 × (60 m + 50 m) × (60 m + 20 m) = 4400 m²
Area of the triangle ΔAGF = 0.5 × 50 m × 80 m = 2000 m²
Area of ΔAHC = 0.5 × 40 m × (20 m + 80 m) = 2000 m²
Area of ΔABC = 0.5 × 30 m × (20 m + 80 m) = 1500 m²
Area of quadrilateral AHCB = 2000 m² + 1500 m² = 3500 m²
Area of triangle ΔCDH = 0.5 × 40 m × (80 m + 60 m) = 2800 m²
Adding together, we get;
2400 + 4400 + 2000 + 2000 + 1500 + 3500 + 2800 = 18,600
The area of composite figure is 18,600 m²\
Area of ΔEFH = 0.5 × 20 m × 40 m = 400 m²
Area of trapezoid GFHJ = 0.5 × (20 m + 40 m) (40 m + 40 m) = 2400 m²
Area of triangle ΔAGJ = 0.5 × 40 m ×(20 m + 60 m) = 1600 m²
Area of triangle ΔABK = 0.5 × 30 m × 60 m = 900 m²
Area of trapezoid BCF_K = 0.5 × (40 m + 30 m) × (40 m + 20 m) = 2100 m²
Area of triangle ΔCIE = 0.5 × 40 m × (40 m + 40 m) = 1600 m²
Area of triangle ΔCDE = 0.5 × 50 m × (40 m × 40 m) = 2000 m²
Adding the areas together, we get;
400 + 2400 + 1600 + 900 + 2100 + 1600 + 2000 = 11000
The area of the field is 11,000 m²
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What is the value of (-3.8) +0+ (-1.6) + 6.4?
Answer:
Step-by-step explanation:
solved & got 8.6
How many rows in the Excel?
In Microsoft Excel 2007, a maximum of 1,048,576 rows may be used. 15.784 columns. A spreadsheet in Excel is composed of columns and rows.
what are columns and rows ?Row refers to a group of objects placed next to or across from one another. A column is defined as a vertical arrangement of objects based on category. The arrangement is done from left to right. The setup is created from top to bottom. The sum is shown on the far right.
here
The rows are horizontally arranged and designated by the numbers 1, 2, 3, and 4.
The letters that go horizontally down the columns are identified by the letters A, B, C, D, etc.
When a column and a row cross, cells are what result.
In Microsoft Excel 2007, 1,048,576 rows is the maximum number permitted. 15,384 rows.
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A regression table mainly shows us Select one: a. How we should run the regression analysis.b. what the coefficients values are, and whether each coefficient is significant (likely to be different from from 0)c. that the smallest coefficients always have the greatest impact on the dependent variable.d. if a large constant term is important.e. all of the above.
A regression table mainly shows us that what the coefficients values are, and whether each coefficient is significant (likely to be different from from 0) .
A regression table is a statistical technique that describes how strongly a dependent variable and one or more independent variables are correlated (s). A field or variable you are attempting to predict or comprehend could be a dependent variable.
Regression allows researchers to predict or explain the variation in one variable based on another variable. The variable that researchers are trying to explain or predict is called the response variable. It is also sometimes called the dependent variable because it depends on another variable.
What is interpretation of regression statistics table?
In statistics, regression is a technique that can be used to analyze the relationship between predictor variables and a response variable. When you use software (like R, SAS, SPSS, etc.) to perform a regression analysis, you will receive a regression table as output that summarize the results of the regression.
A regression table primarily reveals the values of the coefficients as well as the significance of each coefficient (how likely it is that it will depart from 0).
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A farmer has a piece of land measuring 840m by 396m.He divides it into squares plots of equal sizes.Find the maximum area of one plot
Answer:
Step-by-step explanation:
To find the maximum area of one plot, we need to find the greatest common factor of 840 and 396. One way to do this is to use the prime factorization method.
First, we prime factorize 840 and 396:
840 = 2 * 2 * 2 * 3 * 5 * 7
396 = 2 * 2 * 3 * 3 * 11
Then, we find the common factors:
2 * 2 * 3 = 12
So, the greatest common factor of 840 and 396 is 12.
The maximum area of one plot is therefore (840 * 396) / 12 = 140 * 33 = 4620 square meters.
Darnell rents some tables for $362 and some chairs for $3 each for a party. He spends a total of $500.
Answer: 46 chairs
Step-by-step explanation:
First, we have to find the amount of money Darnell spent to rent the chairs by taking
500 - 362 = $138
Then take $138 divided by $3 = 46 chairs
So he rent 1 table and 46 chairs
Answer:
let x - chairs
Darnell rents some tables for $362 and some chairs for $3 each for a party. He spends a total of $500.
500 = 362 + 3x
500 - 362 = 3x
138 = 3x
x = 46
46 chairsCHECKING:500 = 362 + 3(46)
500 = 362 + 138
500 = 500
Therefore, Darnell rents 46 chairs.
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Step-by-step explanation:
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Answer:
The Eastern Continental Trail is 5,376 miles and the Erie Canalway Trail is 384 miles
Step-by-step explanation:
I took 5,760 divided it by 15 and got 384, I then subtracted 5,760 by 384 and got 5,376
Graph the inequality. 3x+4y≥20
see below pictures
Answer:
A.
Step-by-step explanation:
Just put the equation 3x+4y≥20 into y=mx+b form. Subtract 3x from both sides so you get 4y ≥ -3x+20
then divide everything by 4 to isolate the y.
You would get y ≥ -3/4+ 5. Then just use the slope and y-intercept to graph.
If ≥ symbol is used, shade above the line.
What are the 4 properties of a triangle?
The triangle has the following characteristics: A triangle (of any kind) has a total angle of 180 degrees. In a triangle, the lengths of the first two sides are bigger than the length of the third side. The difference between the two sides of a triangle are also smaller than the third side's length.
what is a triangle?The 3-sided polygon known as a triangle is also known as the trigon, however this term is not particularly common. There are three sides to every triangle as well as three angles, some of which may be the same.
It is one of the fundamental shapes in geometry. Triangle ABC refers to a triangle with vertices A, B, and C.
The triangle has the following characteristics: A triangle (of any kind) has a total angle of 180 degrees. In a triangle, the lengths of the first two sides are bigger than the length of the third side. The difference between the two sides of a triangle are also smaller than the third side's length.
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Which expression is equivalent to 2x² 4 3x² 2x 7?
The equivalent expression to 2x² + 4 + 3x² + 2x + 7 is 8x² + 2x + 11.
What is equivalent equation?An equivalent equation is an equation that has the same solution set as another equation. It is a mathematical expression that is equal in value to another expression. The two equations can often be solved using the same methods and yield the same result. Equivalent equations are useful in solving complex mathematical problems by breaking them down into simpler equations.
This is obtained by combining the like terms such as 2x² and 3x², which results in 5x², and 4 and 7 resulting in 11. The expression can be written as 5x² + 2x + 11. The final result can be obtained by multiplying 5x² with 2, which results in 8x². Hence, the equivalent expression is 8x² + 2x + 11.
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A line passes through the point(-5,-6) and has a slope of -2 .
The line passing through point (-5, -6) is y = -2x - 16.
Define Equation of line.
A line in geometry is a collection of points that can be stretched infinitely in two different ways.To put it another way, a line is created by continually extending the two end points in any direction. As a result, we can assert that a line lacks end points. However, because it just has length and no width, it is a one-dimensional geometric form. Based on the information provided, we can create multiple forms of equations for lines algebraically, such as point slope form, slope-intercept form, and two point form.Two Point Form Formula,y - y₁ = m (x - x₁)
Given point is (-5, -6) and slope is -2.
We know the formula is,
y - y₁ = m (x - x₁)
Let, (x₁, y₁) = (-5, -6)
and, m = -2 (slope)
Now, plug in the value
y - (-6) = -2(x - (-5) )
y + 6 = -2(x + 5)
y + 6 = -2x - 10
y = -2x - 10- 6
y = -2x - 16
Hence, the line passing through point (-5, -6) is y = -2x - 16.
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How to find the missing number in a given array from number 1 to n in Java?
Finding the missing number from the N numbers in the given array arr[] of size N-1 with integers in the range [1, N] is the task. The list must not contain any duplicates.
Java method for locating a missing integer in an array of integers from 1 to N:
Make a temp array temp[] of size n + 1 with a value of 0 for each element.
For each element in the input array arr[i], perform the following.
If (temp[arr[i]] == 0), then temp[arr[i]] is 1.
traverse temp[] and output an element of an array with the value of 0. (This is the missing element).
class GFG; import java.io.*; import java.util.*
public static void findMissing(int arr[], int N)
{
int i;
int temp[] = new int[N + 1];
for (i = 0; i <= N; i++) {
temp[i] = 0;
}for (i = 0; i < N; i++) {
temp[arr[i] - 1] = 1;
} int ans = 0;
for (i = 0; i <= N; i++) {
if (temp[i] == 0)
ans = i + 1;
} System.out.println(ans);
}
public static void main(String[] args) {
int arr[] = { 1, 3, 7, 5, 6, 2 };
int n = arr.length; // Function call
findMissing(arr, n);
}
}
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What does an XY scatter plot show?
A Scatter (XY) Plot has points that show the relationship between two sets of data.
Scatter Plots
A Scatter (XY) Plot has points that show the relationship between two sets of data.
In this example, each dot shows one person's weight versus their height.
Example:
The local ice cream shop keeps track of how much ice cream they sell versus the noon temperature on that day. Here are their figures for the last 12 days:
Ice Cream Sales vs Temperature
Temperature °C Ice Cream Sales
14.2° $215
16.4° $325
11.9° $185
15.2° $332
18.5° $406
22.1° $522
19.4° $412
25.1° $614
23.4° $544
18.1° $421
22.6° $445
17.2° $408
And here is the same data as a Scatter Plot:
It is now easy to see that warmer weather leads to more sales, but the relationship is not perfect.
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Consider the following 8 numbers, where one labelled ï is unknown.
14, 28, 28, x, 36, 6, 4, 50
Given that the range of the numbers is 59, work out 2 values of x.
Answer:
177x
Step-by-step explanation:
Who qualifies for SSS partial disability?
Partial disability, according to SSS, is the whole and irreversible loss of a physical portion. An individual can still do their work to some extent despite the condition. Any loss of these body parts or senses qualifies as a partial disability for SSS benefits: only one. One-hand.
In the Philippines, the Social Security System is a government-run social insurance program for employees in the private, public, and unorganized sectors. Republic Act No. 1161, also known as the Social Security Act of 1954, is what created SSS. Later, in 1997, Republic Act No. 8282 changed this statute.
The person must have made at least 36 monthly payments before the semester of incapacity in order to be eligible for a monthly disability pension. If there are less than 36 monthly contributions, the recipient receives a lump sum payment.
"Permanent partial disablement" refers to a permanent disability that limits an employee's ability to earn money. According to the Second Schedule, partly permanent disability results;] "Permanent Total Disablement" ((15B)) refers to such a disablement. National Government Act. 0 Citations, 394 Citations.
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Find The Slope Of The Given Points -> (-4,5) And (9,8)
Answer:
m = 3/13
Step-by-step explanation:
The Slope is rise/run or (y2 - y1) / (x2 - x1)
We see the y increase by 3 and the x increase by 13, so the slope is
m = 3/13
Answer:
Step-by-step explanation:
To find the slope of the line that passes through the points (-4,5) and (9,8), we can use the formula for slope:
slope = (y2 - y1) / (x2 - x1)
= (8 - 5) / (9 - (-4))
= 3 / 13
= 0.231
Therefore, the slope of the line that passes through the points (-4,5) and (9,8) is 0.231.
1. Which of the following equations shows how substitution can be used to solve the following syster
y = 2x + 3
2x + 5y = 3
2x + 5y = 2x + 3
2x + 5(2x + 3) = 3
2(2x + 3) +5y = 3
y = 3
Please help thank you! 3/y -5=x(y+7) translated into words
The given equation can be expressed as xy²+7xy+5y-3=0.
What is an equation?When two expressions are connected with the equals sign (=) in a mathematical formula, it expresses the equality of the two expressions. In English, a well-formed formula with two expressions joined by an equals sign is referred to as an equation; however, cognates of this word in other languages may have slightly different meanings. For instance, the French definition of an equation is one or more variables.
Determine which values of the variables result in the equality to be true in order to solve an equation with variables. The values of the variables that must fulfill the equality to constitute the answer are known as the unknowns, together with the variables for which the equation must be solved. Equations can be classified as either conditional equations or identities.
Given,
(3/y)-5=x(y+7)
(3-5y)/y=(xy+7x)
3-5y=xy²+7xy
xy²+7xy+5y-3=0
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