Need answer ASAP
Keiko and Eric each randomly surveyed people with cell phones. They recorded peoples’ ages (a years) and how many texts they send per day on average (t texts). For their respective data, they each drew a line of best-fit and determined its equation. They then compared equations and made inferences based only on the equations they calculated.
Answer:
subject?
Step-by-step explanation:
The inferences given can be concluded as (a) Agree, (b) Disagree, (c) Agree, (d) Disagree and (e) Disagree
What is an Equation?An equation is the statement of two expressions located on two sides connected with an equal to sign. The two sides of an equation is usually called as left hand side and right hand side.
Given two equations made each by Keiko and Eric. They are,
Keiko : t = -1.63a + 92.14
Eric : t = -1.05a + 80.97
(a) As the value of a increases, the value of t decreases for both of the equations.
So the first statement is true.
(b) When a = 20 and 30, t = 59.54 and 43.24 in the equation of Keiko.
When a = 20 and 30, t = 59.97 and 49.47 in the equation of Eric.
On an average, Eric's equation gives more t.
So second statement is false.
(c) t = 92.14 and t = 80.97 when a = 0.
A person with 0 years old cannot end texts.
So y intercept does not have a relevant meaning.
So c is also true.
(d) -1.63 and -1.05 is the slope of the corresponding lines.
This means that for every 1 year increase in age, the number of text messages decreased by 1.63.
So this is false.
(e) Similarly, in case of Eric's equation, for very 1 year increase in age, the number of text messages decreased by 1.05.
This is also false.
Hence the inferences are either agreed or disagreed as explained.
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a marrow plants 0.5 m long. every week it grows by 20%. a find the value of the common ratio. b calculate how long the plant is after 12 weeks. e comment on the predicted length of the marrow after one year.
Answer:
The common ratio is 1.2.
After 12 weeks the plant will be 4.46 meters long.
After one year the plant will be 6,552.32 meters long.
Step-by-step explanation:
Given that a marrow plants 0.5 m long and every week it grows by 20%, to find the value of the common ratio, calculate how long the plant is after 12 weeks and comment on the predicted length of the marrow after one year must be performed the following calculations:
0.50 x 1.2 ^ X = Y
Therefore, the common ratio is 1.2.
0.50 x 1.2 ^ 12 = Y
0.50 x 8.916 = Y
4.4580 = Y
Therefore, after 12 weeks the plant will be 4.46 meters long.
0.50 x 1.2 ^ 52 = Y
0.50 x 13,104.63 = Y
6,552.32 = Y
Therefore, after one year the plant will be 6,552.32 meters long.
The dot plot shows the ages of students, in years, on a basketball team. Each dot represents 1 student. Find the mean (rounded to the nearest tenth) and the mode of the data.
Answer:
Mode = 15
Mean = 12.8
Step-by-step explanation:
Given the data :
As obtained form the dot plot :
X : 11, 11, 11, 12, 12, 12, 13, 13, 13, 13, 14, 14, 15, 15
The mean of the data:
Mean = ΣX / n
Mean = 179 / 13
Mean = 12.785 = 12.8 years
Mode = most frequently occurring value = 15
Is -90 + (-5) positive or negative? Explain how you know.
Answer:
negative because since -90 and -5 are both negative just add and keep it the sign which is -95
hope this helps
have a good day :)
Step-by-step explanation:
find the solution of the simultaneous equation 4c-5d=21 6c+7d=-12
Answer:
In the second part of the equation, there is a space between 21 and 6c, is there supposed to be a function there?
Step-by-step explanation:
Show that the sum of two irrational numbers can be rational
Answer:
Hint: We will have to know about the rational numbers and irrational numbers. ... So, the sum of the given two irrational numbers is equal to 6 which is a rational number in the form of p/q where p=6 and q=1 both are integers. Therefore, it is proved that the sum of the two given irrational numbers is a rational number.
Step-by-step explanation:
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Answer choices are:
A.60
B.25
C.130
D.50
Answer:
answer: 130
Hope this helps!
Cally wants to coat her driveway with a winter sealer. Her driveway is 18 feet long and shaped like a trapezoid. At the garage door, the driveway is 12 feet wide, then it widens to 20 feet at the street. How many square feet of sealer should Cally buy if she wants to apply two coats?
Answer:
Amount of Winter sealer for 2 coats[in square feet] = 576 square feet
Step-by-step explanation:
Given:
Length of drive way at garage door = 12 feet
Length of drive way at street = 20 feet
Length of total driveway = 18 feet
Find:
Amount of Winter sealer for 2 coats[in square feet]
Computation:
Amount of Winter sealer for 2 coats[in square feet] = 2[Area of trapezoid]
Amount of Winter sealer for 2 coats[in square feet] = 2[(1/2)(Sum of parallel side)(Height)]
Amount of Winter sealer for 2 coats[in square feet] = 2[(1/2)(12 + 20)(18)]
Amount of Winter sealer for 2 coats[in square feet] = 2[(1/2)(32)(18)]
Amount of Winter sealer for 2 coats[in square feet] = 32 x 18
Amount of Winter sealer for 2 coats[in square feet] = 576 square feet
PLEASE HELP PLEASE HELP Queston 10 of 10 Which is a negatively skewed distribution? ОА. 5 18 22 24 26 B. 0 8 10 12 14 16 18 20 22 24 26 29 30 C. PLEASE HELP PLEASE HELP
Answer:
B
Step-by-step explanation:
A and D are normal distributions
C is a positively skewed (right-skewed) distribution
Therefore, B is the answer
From the given options A, D and C are not the answer. B is the negatively skewed distribution.
What is skewed distribution?
A skewed distribution occurs when one tall is longer than the other given.
We have given the data in the options,
We can see that A and D are normal distributions.
C is a positively skewed (right-skewed) distribution.
Therefore, B is the negatively skewed distribution.
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The following two way table describes students after school activities find the probability that a randomly selected student is in sports
Answer:
0.65
Step-by-step explanation:
There’s 65 students total in sports, so you divide that by 100 to get your answer
Answer:
0.65Step-by-step explanation:
sophomore + junior + senior = total number of students that play sports
20 + 20 + 25 = 65
65 ÷ 100 = 0.65
0.65 rounded to the nearest hundred would still be 0.65
Determine whether the given number is an irrational number or a rational number and place it in its representing
category
v120
Irrational Numbers
Rational Numbers
V36
7
10
148
781
Answer:
See below
Step-by-step explanation:
√120 is irrational since it cannot be written as a fraction
√36 is rational because it can be written as 6 or -6 which are both rational
7 is rational because it can be written as a fraction (ex. 7/1, 14/2, 21/3, etc.)
10 is rational because it can be written as a fraction (ex. 10/1, 20/2, 30/3, etc.)
148 is rational because it can be written as a fraction (ex. 148/1, 296/2, 444/3, etc.)
781 is rational because it can be written as a fraction (ex. 781/1, 1562/2, 2343/3, etc.)
Solve the equation. 18 = m - 18
Answer:
n = 36
Step-by-step explanation:
18 = n - 18
add 18 to both sides
36 = n
n = 36
If my answer is incorrect, pls correct me!
If you like my answer and explanation, mark me as brainliest!
-Chetan K
Answer:
36
Step-by-step explanation:
18 + 18 = 36
36 - 18 = 18
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If each cube in the rectangular prism measures 1 cubic foot, what is the volume of the prism?
A.
8 cubic ft
B.
6 cubic ft
C.
11 cubic ft
D.
7 cubic ft
Answer:
6 cubic feet
Step-by-step explanation:
Since each cube represents 1 cubic foot
volume of the prism = number of cubes * volume of 1 cube
Given
number of cubes = 6
volume of 1 cube = 1cubic foot
Substitute
volume of the prism = 6 * 1
volume of the prism = 6 cubic feet
pls help me with this
Answer:
I think your answer should be A.
Step-by-step explanation:
Plz mark brainliest
Answer:
it is C youre right!
Step-by-step explanation:
A plot of land is 5,824 square feet. It is divided into 4 equal sections.
Answer:
1456!!!!!!!!!!!!!!!
Step-by-step explanation:
5824 ÷ 4 = 1456
Answer: 1,456!
Step-by-step explanation: divide 5,824 ÷ 4 = 1456
What's the answer for each to get 30 points!
Answer: "greater than" for each of the 4 dropdown menus
======================================================
Explanation:
Divide each value in the table by 40
You should get:
Horse = 15/40 = 0.375Cow = 12/40 = 0.300Sheep = 14/40 = 0.350Pig = 19/40 = 0.475Those decimal results are the experimental (ie empirical) probabilities. Theoretically, we should get 1/4 = 0.250 for each sticker type assuming each sticker is likely to be chosen. As you can see, each decimal value shown above is larger than the theoretical target of 0.250, so each answer is "greater than"
-----------
Here's another way to see why this is:
If we had 40 stickers total, and each animal has the same number of stickers, then we should have 40/4 = 10 stickers per animal type. But the table shows each frequency is above 10. So that must directly mean the empirical probability of picking any animal is greater than the theoretical probability.
There are 12 paintings at an art show. Three of them are chosen randomly to
display in the gallery window. The order in which they are chosen does not
matter. How many ways are there to choose the paintings?
Answer:
220
Step-by-step explanation: a p e x
There are 220 ways to choose the paintings.
What is combination in mathematics?"Combination determines the number of possible arrangements in a collection of items where the order of the selection does not matter."
Formula for combination:[tex]^{n}C_r=\frac{n!}{r!(n-r)!}[/tex]
For given example,
There are 12 paintings at an art show.
⇒ n = 12
Three of them are chosen randomly to display in the gallery window.
⇒ r = 3
So, using the formula for combination, the number of possible ways to choose the paintings would be,
[tex]\Rightarrow~ ^{n}C_r=\frac{n!}{r!(n-r)!}\\\\\Rightarrow~ ^{12}C_3=\frac{12!}{3!(12-3)!}\\\\\Rightarrow~ ^{12}C_3=\frac{12!}{3!\times 9!}\\\\\Rightarrow~^{12}C_3=220[/tex]
Therefore, there are 220 ways to choose the paintings.
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please help me i really need help please help me please i really need help please help me please
Answer:2.
Step-by-step explanation:
trust me on this one
frank used 21 gallons of gas to travel 390 miles to memphis. How many gallons of gas should he expect to use to travel 635 miles to Daytona Beach? Round your answer to the nearest whole number
Answers
A) 32 gallons
B) 33 gallons
C) 34 gallons
D) 35 gallons
Answer:
21 G = 390miles
G = 390/21
G = 18.57
gallons of gas should he expect to use to travel 635 miles to Daytona Beach
= 635/18.57
=34.19
Hence, 34 gallons is the correct answer
Which statement is true..
Answer:
D
Step-by-step explanation:
count the rise over run of 2 real points
What is the volume of a triangular prism whose base has an area of 38.2mm and heigh of the prism meausers 14mm?
Answer:
534.8
Step-by-step explanation:
Volume= area × height
= 38.2×14
= 534.8
Hence the volumer is 534.8
Answer:
534.8 mm
Step-by-step explanation:
The volume of a triangular prism is given by the relation :
Volume = Base area * height
Base area = 38.2 mm
Height = 14 mm
Hence, the Volume of triangular prism is :
V = 38.2mm² * 14mm
Volume = 534.8 mm
yoyoyoyo I need some help, please!
Answer:
Y/X
Step-by-step explanation:
Answer:
x/y
Step-by-step explanation:
A group of 10 students are all 54 to 56 inches tall. An adult who is 74
inches tall joins the group. Which statement is true for this situation?
A None of the measures of central tendency (mean, median, or mode)
will be affected by the adult's height.
B. The median height will be more affected by the adult's height than
the mode(s) or the mean.
C. The mode(s) will be more affected by the adult's height than the
median or the mean.
D. The mean height will be more affected by the adult's height than the
mode(s) or the median.
Answer:
D. The mean height will be more affected by the adult's height than the
mode(s) or the median
Step-by-step explanation:
If you include an outlier in a set of data, its mean WILL change and get higher in this case.
The correct answer is the mean height will be more affected by the adult's height than the mode(s) or the median which is option D.
ModeSince, the mode refers to the most common number of a data set, and if the adult who is 74 inches tall joins the group of that [tex]10[/tex] students will not affect the mode as the most common height will be between 54 to 56 inches.
MedianAlso, the median refers to the middle number of a data set in ascending to descending order and if the adult joins the group of 10 students then its height will be at last and not much affect the median of the group of 10 students.
MeanNow, the mean refers to the average of a data set which is calculated by the adding the numbers and dividing the sum by the number of numbers in the data set and if the adult joins the group of 10 students then it will affect the mean of the group of 10 students as there will be a huge difference in the average when the adult joins the group.
So, accordingly, the correct option is D. The mean height will be more affected by the adult's height than the mode(s) or the median.
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Elijah has
1/2
bag of candy. A bag of candy weighs
5 pounds. How many pounds of candy does Elijah have?
Answer:
2.5 pounds of candy
Step-by-step explanation:
5 / 2 = 2.5
In other words 5 divided by 2 is 2.5 pounds of candy
Set up an equation and solve for unknown variable.
“The difference of 2 and a number is equal to the sum of 5 and that same number”
Answer:
x = 3/2 or 1.5
Step-by-step explanation:
Let the unknown number be x.
Translating the word problem into an algebraic expression, we have;
2 - x = 5 + x
Rearranging the equation, we have;
x + x = 5 - 2
2x = 3
x = 3/2
x = 1.5
500 - 20x ≥ 200 I need help
Answer:
x [tex]\leq[/tex] 15
Step-by-step explanation:
What is the factorization of the polynomial below?
3x3-12x2 - 96x
O A. 3x(x-8)(x+4)
O B. 3x(x + 3)(x+4)
O C. 3(x2 - 3)(x+4)
OD. 3(x-8)(x + 4)
Answer:
The answer is A. 3x (x-8) (x+4)
Co...
1.2 m
2.5 m
3.5 m
The front of a house needs to be painted black. The garage door is 1.5 m high and 2 m wide.
A) How many square meters of black paint will be needed to paint the house not including the
garage door?
Show your work
Answer:
16
Step-by-step explanation:
Multiplecation by the length width, and the height, then divide and its 16.
6 quarters + 5 dimes + 3 Nickels + 4 Pennys
Answer:
.
Step-by-step explanation:
Answer:
You'll have $2.19.
Step-by-step explanation:
Quarters:
0.25 + 0.25 + 0.25 + 0.25 = 1.00
1.00 + 0.25 = 1.25 + 0.25 = 1.50
Dimes:
1.50 + 0.10 + 0.10 = 1.70 + 0.10 = 1.80 + 0.10 + 0.10 = 2.00
Nickles:
2.00 + 0.05 = 2.05 + 0.05 = 2.10 + 0.05 = 2.15
Pennies:
2.15 + 0.04 = 2.19