Answer:
71
Step-by-step explanation:
Mean is Average
You can Find the Mean of a set of numbers by adding them all up and then dividing that number by the amount of numbers in the set.
72 + 75 + 68 + 84 = 231
231 / 4 = 57.75
This is his current mean.
Let's add his next score.
72 + 75 + 68 + 84 + 71 = 370
Divide by 5 instead of 4 because we added another number to the data set.
370 / 5 = 74
40
×
40
17
Evaluate
Answer:
your answer would be 160680
Step-by-step explanation:
Brihanna travels 60 kilometers in two hours. How many meters of distance will she cover in one minute?
Answer:
1
Step-by-step explanation:
60 Kilometers = 120 minutes
60 ÷ 120 = .5
.5 × 2 = 1
1 kilometer = 2 Minutes
If Billy's truck can drive 12.6 miles per
gallon of gas. If he has 11.3 gallons of gas in his
truck, how many miles will he be able to drive before
running out of gas?
WHAT'S THIS?!?!
MORE FR3E POINTS!!
WOWWWW!!!
Answer: wowwww LOL
Step-by-step explanation:
Thanks Mr Shady, the f r e e p o. i n t s are now mine.
Cual es la medida en grados de 10 pi?
Step-by-step explanation:
2pi = 360°
=>
10pi = 5×2pi = 5×360 = 1800°
Latanya has 37 m of fencing to build a three-sided fence around a rectangular plot of land that sits on a riverbank. (the fourth side of the enclosure would be the river.) the area of the land is 143 square meters. list each set of possible dimensions (length and width) of the field.
The set of possible dimensions (length and width) of the field are {13.5, 10, 5.5, and 26}.
What is the perimeter of the rectangle?The perimeter of a rectangle is defined as the addition of the lengths of the rectangle's four sides.
The perimeter of a rectangle = 2(L+W)
Where W is the width of the rectangle and L is the length of the rectangle
The perimeter = 2W+ L
37 = 2W + L
L = 37 - 2W
Hence,
area = W(37 - 2W)
143 = 37W - 2W²
-2W² + 37W - 143 = 0
W² - 18.5 W + 71.5 = 0
W = 13.5, 5.5
Take the value of W = 13.5
Then,
L = 37 - 2W
L = 37 - 2(13.5)
L = 10 meters
Take the value of W = 5.5
Then,
L = 37 - 2W
L = 37 - 2(5.5)
L = 26 meters
Therefore, the set of possible dimensions (length and width) of the field are {13.5, 10, 5.5, and 26}.
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What is the difference? −15 − (−3)
Line l contains the points (-1,-5) and (6,4). Line is perpendicular to line l and contains the point (9,3). what is the equation of line ?
keeping in mind that perpendicular lines have negative reciprocal slopes, let's check for the slope of the line L above
[tex]\stackrel{\textit{slope for line L}}{(\stackrel{x_1}{-1}~,~\stackrel{y_1}{-5})\qquad (\stackrel{x_2}{6}~,~\stackrel{y_2}{4})} ~\hfill \stackrel{slope}{m}\implies \cfrac{\stackrel{rise} {\stackrel{y_2}{4}-\stackrel{y1}{(-5)}}}{\underset{run} {\underset{x_2}{6}-\underset{x_1}{(-1)}}} \implies \cfrac{4 +5}{6 +1}\implies \cfrac{9}{7} \\\\[-0.35em] ~\dotfill[/tex]
[tex]\stackrel{~\hspace{5em}\textit{perpendicular lines have \underline{negative reciprocal} slopes}~\hspace{5em}} {\stackrel{slope}{\cfrac{9}{7}} ~\hfill \stackrel{reciprocal}{\cfrac{7}{9}} ~\hfill \stackrel{negative~reciprocal}{-\cfrac{7}{9}}}[/tex]
so we're really looking for the equation of a line whose slope is -7/9 and that it passes through (9 , 3)
[tex](\stackrel{x_1}{9}~,~\stackrel{y_1}{3})\hspace{10em} \stackrel{slope}{m} ~=~ - \cfrac{7}{9} \\\\\\ \begin{array}{|c|ll} \cline{1-1} \textit{point-slope form}\\ \cline{1-1} \\ y-y_1=m(x-x_1) \\\\ \cline{1-1} \end{array}\implies y-\stackrel{y_1}{3}=\stackrel{m}{- \cfrac{7}{9}}(x-\stackrel{x_1}{9}) \\\\\\ y-3=- \cfrac{7}{9}x+7\implies {\Large \begin{array}{llll} y=- \cfrac{7}{9}x+10 \end{array}}[/tex]
100 PONITSS HELPPPPPPPPP
Mrs. Sparks is a 9th grade Algebra 1 teacher. She teaches three
Algebra 1 courses and all the classes recently took a chapter exam.
Below are the scores.
Class 1
45
68
77
90
90
95
100
100
86
90
50
55
Class 2
64
65
70
40
100
87
84
88
90
90
95
80
Class 3
70
75
75
90
100
80
55
65
76
80
88
99
a. Find the mean, median, mode and range of Class 1.
b. Find the mean, median, mode and range of Class 2.
c. Find the mean, median, mode and range of Class 3.
d. Find the standard deviation of Class 1.
e. Find the standard deviation of Class 2.
f. Find the standard deviation of Class 3.
g. Which class had a higher standard deviation and what does that mean?
h. In your opinion, which class did better on the exam? Explain your answer.
The values of the descriptive statistics of the given data on the scores of the classes in the Algebra class are;
a. Mean; 78.83, Median; 88, Mode; 90, Range; 55
b. Mean; 79.52, Median; 85.5, Mode; 90, Range; 60
c. Mean; 79.52, Median; 78, Mode; 75, Range; 45
d. 19.66
e. 16.87
f. 13.27
g. Class 1
h. Class 3
What is a descriptive statistic?A descriptive statistic is one that provides an idea of contents of a dataset by outlining the pattern found within the dataset
Mean
The mean of the dataset is given by the formula;
[tex] \displaystyle{Mean = \frac{Sum \: of \: data}{Number \: of \: data}} [/tex]
Median
The median of a dataset is the middle term of a dataset when the data are arranged in increasing order
Mode
The mode of a dataset is the value that occurs most frequently
Range
The range is given by the difference between the maximum and minimum values of the dataset
a. The mean of Class 1 obtained from an application is 78.83
The median = 88
The mode = 90
The range = 55
b. The mean of Class 2 obtained from an application is 79.42
The median = 85.5
The mode = 90
The range = 60
c. The mean of Class 3 obtained from an application is 79.42
The median = 78
The mode = 75
The range = 45
d. The standard deviation is given by the formula;
[tex] \displaystyle{\sigma = \sqrt{\frac{\sum (x_i -\bar x)^2} {N}}}[/tex]
Where;
[tex] \displaystyle{ x_1}[/tex] = The ith data
[tex] \displaystyle{\bar x}[/tex] = The mean
N = The number of data
Solving using a spreadsheet application, we have;
The standard deviation for class 1 = 19.65
e. The standard deviation of class 2 found using a spreadsheet application is 16.87
f. For class 3, the standard deviation is 13.27
g. From the above calculations, the class that has the highest standard deviation is class 1, with a standard deviation of 19.65
The high standard deviation means that there is a lot of variability or variation in the scores of class 1
h. The class that did better is class 3, that has the lowest standard deviation and range as well as one of the highest mean
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Easy division standard algorithim-USE PAPER!
100 POINTS USE PAPER AND NO LIES
Answer:
PLsss mark as brainliest
Kimai is making blankets for charity. In order to determine how many hats she can make per hour, she created 3/5 of the hats in 1/8 of an hour. Which would be the proper form of the unit rate?
hurry!!!!
When Kimai is making blankets for charity, the proper form of the unit rate is 4 hats per hour.
How to calculate the value?From the information given, it was stated that Kimai is making blankets for charity. In order to determine how many hats she can make per hour, she created 3/5 of the hats in 1/8 of an hour.
Therefore, the proper form of the unit rate will be:
= Amount of hats / Time
= 3/5 ÷ 1/8
= 3/5 × 8/1
= 4.8
Therefore, the proper rate will be 4 hats per hour.
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Answer: 4 hats per hour
Step-by-step explanation:
A highway has a minimum speed limit of 45 miles per hour and a maximum speed limit of 70 miles per hour. Write an inequality that represents the legal driving speeds, s, in kilometers per hour.
The inequality that represents the legal driving speeds, s, in kilometers per hour is 45 >= s <= 70.
What is an inequality?It should be noted that an inequality is simply used in mathematics to show that the expression or equation aren't equal.
From the information, the highway has a minimum speed limit of 45 miles per hour and a maximum speed limit of 70 miles per hour.
Therefore, the inequality that represents the legal driving speeds is 45 >= s <= 70.
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Emiliano buys two coffees for $8.98. He tips the barista 20% of the bill. How much did Emiliano tip? Round your answer to the nearest cent.
Please help!
The amount for Emiliano tip is $1.8.
How to calculate the value?From the information, Emiliano buys two coffees for $8.98 and he tips the barista 20% of the bill.
The value of the tip will be:
= Percentage × Value of coffee
= 20% × $8.98
= 0.2 × $8.98
= $1.796
= $1.8 to the nearest cent.
This illustrates the concept of multiplication.
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Solve the following system of equations using Gaussian elimination
how do I solve. step by ptep please
2x - y + 4z = 33
x + 2y - 3z = -26
-5 x - 3y +5z = 23
After solving the system of equations using Gaussian elimination we get the values as x = 5 , y = -11 and z=3
Given we have the system of equations as follows:
2x - y + 4z = 33
x + 2y - 3z = -26
-5 x - 3y +5z = 23
Rewrite the system in matrix form and solve it by Gaussian elimination.
[ 2 -1 4 [ 33
1 2 -3 = -26
-5 -3 5 ] 23 ]
Now divide row 1 by row 2.
[ 1 -0.5 2 [ 16.5
1 2 -3 = -26
-5 -3 5 ] 23 ]
Now R₂ - 1R₁ → R₂
and R₃ + 5R₁ → R₃
[ 1 -0.5 2 [ 16.5
0 2.5 -5 = -42.5
0 -5.5 15 ] 105.5 ]
Divide row 2 by 2.5.
[ 1 -0.5 2 [ 16.5
0 1 -2 = -17
0 -5.5 15 ] 105.5]
R₁+0.5R₂ → R₁
R₃ + 5.5R₂ → R₃
[ 1 0 1 [ 8
0 1 -2 = -17
0 0 4 ] 12 ]
Divide R₃ by 4
[ 1 0 1 [ 8
0 1 -2 = -17
0 0 1 ] 3 ]
Therefore, R₁-1R₃→R₁
R₂ + 2R₃ → R₂
[ 1 0 1 [ 5
0 1 0 = -11
0 0 1 ] 3 ]
therefore x = 5, y=-11 and z = 3.
Hence we solved the system of equations using Gaussian elimination.
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What additional information is needed to determine that ΔABC ≅ ΔEDC using the HL method of congruence?
Answer:
B
Explanation:
Given:
By using HL method of congruence, we can determine that triangle ABC is congruent to triangle EDC. HL method of congruence means that the two right triangles are congruent if the hypotenuse and one corresponding leg are equal in both triangles. Based on the given figure, we see taht the legs AB and DE are congruent. Next, we check for a pair of hypotenuses. So, we need AC congruent to EC.
Therefore, the additional information we needed using HL method of congruence is AC congruent to EC.
Tess is 3 inches shorter than Johnny. Johnny is i inches tall. Write an expression that shows how many inches tall Tess is.
The expression that shows how many inches tall Tess is t = i - 3.
What is an expression?Expression simply refers to the mathematical statements which have at least two terms which are related by an operator and contain either numbers, variables, or both.
Addition, subtraction, multiplication, and division are all possible mathematical operations. As an illustration, the expression x + y has the terms x and y with an addition operator between them.
In this case, Tess is 3 inches shorter than Johnny. and Johnny is i inches tall. Since Tess is shorter, we will subtract.
Therefore, the expression will be:
t = i - 3
where t = Tess height.
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given g(x)=2x-4 , find g(2)
Answer:
g(2) = 0
Step-by-step explanation:
g(2) is the value of x.
So, we would place g(2) with x:
g(2) = 2(2) - 4
g(2) = 4 - 4
g(2) = 0
If the given function is g(x)=2x-4, the value of g(2) will be 0.
What is a function?The function is described as a particular kind of relationship, and each value in the domain is associated with exactly one value in the range according to the function. They have a predefined domain and range.
It is given that the function is, g(x)=2x-4
We have to find g(2).
In order to find the g(2), substitute 2 as the place of x as,
g(x)=2x-4
g(2)=2×2-4
g(2)=4-4
g(2)=0
Thus, for the given function g(x)=2x-4, the value of g(2) will be 0.
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Find the measure of each arc. For each arc, write two or more complete sentences explaining which theorem or postulate you used to find your answer. Include your equations and calculations in your final answer.
m arcRP
In the illustration above, a circle with a few lines intersecting at various locations is shown. So, if we split the circle in half, the resulting semicircle has a vertical angle of 180 degrees. Since ∠ROP = 125°, ∠POS = 55° is obtained by taking 180° away from 125°. ∠POS and ∠QOR are equivalent terms. Also, ∠ROP = ∠QOS.
What is lines intersecting?
In a plane, intersecting lines are any two or more lines that cross one another. The point of intersection, which can be found on all intersecting lines, is where the crossing lines share a common point.
the characteristics of intersecting lines
The intersecting lines (two or more) never cross over at more than one location.
Any angle may be used to intersect the lines in any direction. Always larger than 0° and less than 180°, this angle is generated.
A pair of vertical angles are created by two intersecting lines. The vertical angles have the same vertex and are opposing angles (which is the point of intersection).
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Between 11 pm and 8:10 am, the water level in a seimming pool decreased by 5/12 in. Assuming that the water level decreased at a constant rate, how much did the water level drop each hour?
The rate at which the water level dropped each hour is 5 / 34 inches per hour.
What is the rate of water drop each hour?In order to determine the rate at which the water level dropped each hour , divide the total decrease in the water level by the total time it took for the water to decrease.
Division is the process of grouping a number into equal parts using another number. The sign used to denote division is ÷. Division is one of the basic mathematical operations.
Change in water level per hour = total decrease / change in time
Change in time = 11 - 8 : 10 = 2 : 50 am = 2 hours 5/6 minutes
Change in water level per hour = 5/12 ÷ 2 5/6
5/12 ÷ 17/6
5 / 12 x 6 / 17 = 5 / 34 inches per hour
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5. If line a is parallel to line b,
0
L
(x+127
What angle pair relation is identi
Write an equation to solve for x.
X =
Answer:
x = 21
Step-by-step explanation:
Given line a is parallel to line b we can form the following equation to find the value of x:
6x + 12 + 2x = 180 (because these are supplementary angles and their sum is equal to 180)
add like terms
8x + 12 = 180 subtract 12 from both sides
8x = 168 divide both sides by 8
x = 21
What is the value of x? (1 point)
A.24
B.9
C.21
D.14
Question 2 [5 marks] A rectangular milk carton holds 2.1 litres of milk (2100 cm³). The base of the carton is a square. The height is 26.64cm and the width and length are 8.88cm each. 2.1. If the width and length of the carton is doubled, and the height remains the same, how much milk will the carton now hold? (3)
The carton can hold 8402.7cm3 or 8.4 litres of milk now
What volume of milk can the carton hold now?Initially, the width and length of the carton are 8.88cm each.
Now, the width and length of the carton are doubled. That is:
The width and length are 2 x 8.88cm = 17.76 cm each
But the height remains the same: 26.64cm
Volume of the carton = width x length x height
= 17.76 x 17.76 x 26.64
= 8402.7 cm3 = 8.4 litres
Therefore, the quantity of milk the carton can hold now is 8402.7 cm3 or 8.4 litres.
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the circumference of a circle is 60cm what is the area
step by step explanation please
Answer: The area of a circle is 286.37cm².
Step-by-step explanation: The answer to this question can be solved by finding the value of the radius from the circumference and substituting it into the area.
Following are the steps to solve this problem:-
Step 1. The circumference of the circle is 60cm.
The formula for the circumference of a circle is 2[tex]\pi \\[/tex]r.
Step 2. Calculating the value of radius (r) is 2[tex]\pi[/tex]r=60 cm.
2x 3.14xr =60cm.
r= 9.55cm
Step 3. Calculate the area of a circle by using the formula [tex]\pi[/tex]r²
Substituting the valur r( from step 2 ) in the formula
3.14x9.55x9.55= 286.37cm²
Thus, the answer is 286.37cm²
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Hepllllllllll plssssssssssss
The function that best describes the graph is y = x² + 9x + 18. The correct option is B. y = x² + 9x + 18
From the question, we are to determine the function that best describes the graph
From the graph, we can observe that the roots of the quadratic equation are x = -6 and x = -3
Thus,
(x + 6) and (x + 3) are factors of the quadratic equation.
Then,
Multiplying the factors, we get
(x + 6)(x + 3) = 0
x(x +3) + 6(x + 3) = 0
x² + 3x + 6x + 18 = 0
x² + 9x + 18 = 0
This means the function is y = x² + 9x + 18
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3(x+2)+7 equivalent expression
multiply ecerything that is in the brackets by 3
[tex]3(x) + 3(2) + 7 \\ = 3x + 6 + 7 \\ = 3x + 13[/tex]
ATTACHED IS THE SOLUTION
32 = 5u +3u solve for u
Answer:
u = 4
Step-by-step explanation:
32 = 5u + 3u = 8u ( divide both sides by 8 )
4 = u
Step-by-step explanation:
u=4 after you add or combine like terms , you then divide both sides by the same factor
Drag the similar figure into the table. Angle measures are rounded to the nearest integer.
Answer:
drag Traingle B into the box
The similar figure is B. , which have to drag into the table.
What is triangle?A triangle is a polygon with three edges and three vertices. It is one of the basic shapes in geometry. A triangle with vertices A, B, and C is denoted \triangle ABC. In Euclidean geometry, any three points, when non-collinear, determine a unique triangle and simultaneously, a unique plane.
here, we have,
from the given diagram, we get,
the shown figure is a equilateral triangle with all angle =60 degree.
And, as shown, in figure B. we get , a equilateral triangle with all angle 60degree.
Hence, The similar figure is B. , which have to drag into the table.
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2.4 ft x 1.8 ft x 1.2 ft=
Answer: 5.184 ft
Step-by-step explanation:
REally need help plss
1) The relationship between ∠1 and ∠3 is that they are corresponding angles.
2) The relationship between ∠8 and ∠4 is that they are alternate exterior angles
3) The relationship between ∠2 and ∠3 is that they are supplementary angles.
How to identify corresponding angles?When it comes to congruent angles, we know that when two parallel lines are intersected by a third one, the angles that occupy the same relative position at each intersection are known to be corresponding angles to each other.
Now, in the first figure, we see that there are a total of eight angles and we also see that 2 parallel lines have been intersected by a third one. Thus, some of the angles will be congruent to others. In this case, we see that the relationship between ∠1 and ∠3 is that they are corresponding angles.
Now, in the second figure, we see that there are a total of eight angles and we also see that 2 parallel lines have been intersected by a third one. Thus, some of the angles will be congruent to others. In this case, we see that the relationship between ∠8 and ∠4 is that they are alternate exterior angles because they are formed on the outside of the parallel lines.
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What is the slope of y= 1/4 x -2
Answer:
The slope is 1/4
Step-by-step explanation:
hope it helps