The value of the expression will be;
⇒ 4
What is an expression?
Mathematical expression is defined as the collection of the numbers variables and functions by using operations like addition, subtraction, multiplication, and division.
Given that;
The expression is,
⇒ 2 - [(2 + 10(−1) ÷ 2) + 1]
Now,
Solve the expression by using BODMAS rule as;
The expression is,
⇒ 2 - [(2 + 10(−1) ÷ 2) + 1]
⇒ 2 - [ (2 - 10 ÷ 2) + 1 ]
⇒ 2 - [(2 - 5) + 1 ]
⇒ 2 - [ - 3 + 1 ]
⇒ 2 - { - 2 ]
⇒ 2 + 2
⇒ 4
Thus, The value of the expression will be;
⇒ 4
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due last week pls help me
The car B was 10 miles east of Car A.
A function is a formula, rule, or law that specifies how one variable (the independent variable) and another variable are related. The linear equation is of the form Ax+By+C=0.
Where A and B are the coefficient and C is the constant.
Speed of car A = 45 miles per hour and the direction of car A is East.
The distance of car B from Johnstown after 2 hours is 100 miles, east
The distance of car B from Johnstown is given on the graph.
So , the initial distance of car A from Johnstown will be,
= 100 - 2 × 45
=100 - 90
= 10 miles
As seen from the graph, the initial distance, east, of car B from Johnstown is 20 miles.
So, the difference between the cars will be 20-10= 10 miles that means car B was 10 miles east of Car A.
Therefore, the car B was 10 miles east of Car A.
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researchers are investigating whether people who exercise with a training partner have a greater increase, on average, in targeted exercise intensity compared with people who exercise alone. two methods of collecting data have been proposed. method i: recruit volunteers who are willing to participate. randomly assign each participant to exercise with a training partner or to exercise alone. method ii: select a random sample of people from all the people who exercise at a community fitness center. ask each person in the sample whether they use a training partner, and use the response to create the two groups. (a) for each method, the researchers will record the change in targeted exercise intensity for each person in the investigation. they will compare the mean change in intensity between those who exercise with a training partner and those who do not. (i) describe the population of generalization if method i is used. explain your answer. (ii) describe the population of generalization if method ii is used. explain your answer.
Random sampling: It is a type of probability sampling in which the researcher randomly selects a subset of participates from the population.
Biased Sample: Sampling bias is a bias in which a sample is collected in such a way that some members of the intended population have a lower and higher sampling probability than other.
The population generalized in this case, is almost random, the only problem here is that people that want to participate will participate so is likely that the sample is not totally randomized and that there is huge number of people that regularly exercises.
b) This case is less random than the previous , here all the people in the sample regularly do exercise and these people can choose is they prefer to work with a partner or not. So the sample is biased.
In method 01 we can conclude that the result apply to the whole population , whole in method 02 we can't conclude that just because the sample is biased.
Method 01: - Recruit volunteers who are willing to participate. Randomly assign each participate to exercise with a training partner or exercise alone.
So there are people who wants to participate but people don't necessarily do exercise normally day to day life. People also can't choose to work out in a team or alone.
Method 02: Select a random sample of people from all the people who exercise at a community fitness center. ask each person in the sample whether they use a training partner, and use the response to create the two groups.
The members in the sample are people who exercises regularly and we ask them if they work alone or with a partner then, we create two groups. so this is more biased sample.
The population generalization, in this case, is almost random, the only problem here is that only people that want to participate will participate , so is likely that the sample is not totally randomized and that there is a larger number of people that regularly does exercise tan people that do not do exercise.This case is less than random than the previous here all the people in the sample regularly do exercise and these people can choose if they prefer to work with a partner or not. So the sample is biased.Learn more about Sample:
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Stella drives 25 miles in 20 minutes. If she drove two hours in total at the same rate, how far did she go?
Lines a and b are parallel and lines e and f are parallel
If m1 = 89°, what is m5?
Answer:
m∠5 = 91° (sorry if i got it wrong i tried my best)
when people smoke, the nicotine they absorb is converted to cotinine, which can be measured. a sample of 40 smokers has a mean cotinine level of 172.5 with a standard deviation is known to be 119.5, find a 90% confidence interval estimate of the mean cotinine level of all smokers.
The 90% confidence interval estimate of the mean cotinine level of all smokers is 141.4211 < μ < 203.5789
Given,
Number of smokers; Sample size, n = 40
Mean of the sample, μ = 172.5
Standard deviation, σ = 119.5
We have to find the 90% confidence interval estimate of the mean cotinine level of all smokers.
Here,
The confidence interval is given as;-
x − E < μ < x + E
E is the margin of error.
Margin of error,
E = zα/₂ σ/√n
E = 1.644854 119.5/√40
E = 31.07887
Then,
The confidence interval is;
x − E < μ < x + E
141.4211 < μ < 203.5789
That is,
The 90% confidence interval estimate of the mean cotinine level of all smokers is 141.4211 < μ < 203.5789
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Use properties to rewrite the given equation. Which equations have the same solution as 2.3p – 10.1 = 6.5p – 4 – 0.01p? Select two options. 2.3p – 10.1 = 6.4p – 4 2.3p – 10.1 = 6.49p – 4 230p – 1010 = 650p – 400 – p 23p – 101 = 65p – 40 – p 2.3p – 14.1 = 6.4p – 4
what is 13x − 19y = –14 in slope intercept form
Answer:
Step-by-step explanation:
-19y=-13x -14 to y=-13/-19 - -14/-19
Which number can be added to a rational number to explain that the sum of two rational numbers is rational?
A √5
B √2
C 8
D pi
Answer:d
Step-by-step explanation:
Can anyone help me with the answer for number 5 & 6 I really need my math homework done , it will be graded. Thank you.
Answer:
5. 1/2 & 3 , 6. 2 & 5
Step-by-step explanation:
5.
slope = 2
m = y2 - y1 / x2 - x1
m = 13-3/5-0
m = 10/5 or 2
y-intercept = 3
(0,3)
6.
slope = 1/2
m = y2 - y1 / x2 - x1
m = 6-5/2-0
m = 1/2
y-intercept = 5
(0,5)
New york city will pay two men $36 million for their wrongful conviction in the 1965 assassination of civil rights activist. ?.
New York City will indeed pay two men $36 million for their wrongful conviction in the 1965 assassination of a civil rights activist.
How is the chronology so that New York City pays for the incident of wrongful conviction of two people for the alleged murder of a civil rights leader?
After carrying out further investigations into the lawsuits against 2 people, in particular Muhammad A. Aziz and Khalil Islam who were accused of the murder of the leader of civil rights activist, Malcolm X, it was found that the two defendants were victims of wrongful conviction. It was previously stated that the police appeared to be withholding evidence to weaken the charges leading to acquittal. However, in the end, the court gave an acquittal because it was known that Muhammad Aziz and Khalil Islam had been proven innocent. As a form of accountability, New York City is willing to pay 26 million dollars to the victims and an additional 10 million dollars from New York state.
In conclusion, the amount of money paid by New York City is a form of responsibility that has been approved for the wrongful conviction of Muhammad Aziz and Khalil Islam.
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Write the equation of the line in slope intercept form and given the slope and y-intercept.
1) slope = 3/4 and (0, 4). 2) slope = -1 and (0, -2)
Please,help. Been stuck for two days
The equation of each line in slope-intercept form are:
1. y = 3/4x + 4.
2. y = -x - 2
What is the Equation of a Line in Slope-intercept Form?To express the equation of a line in slope-intercept form, y = mx + b, substitute the value of the slope (m) and the value of the y-intercept (b) into the equation.
1. Slope (m) = 3/4
y-intercept (b) = 4
Substitute m = 3/4 and b = 4 into the equation y = mx + b:
y = 3/4x + 4.
2. Slope (m) = -1
y-intercept (b) = -2
Substitute m = -1 and b = -2 into the equation y = mx + b:
y = -x - 2
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is 1.12 a terminating decimal? Or as a fraction, is 1 3/25 a terminating decimal?
PLEASE HELP I NEED A AWNSER FAST
Answer: -4
Step-by-step explanation:
Which relation represents a function?
The relation that is a function is (d) the graph
How to determine the relation that is a function?The list of options represents the given parameter
As a general rule;
For a relation to be considered a function, the following must be true:
One x value must not point to several y values
Using the above as a guide, the ordered pair in (a), relation in (b) and table in (c) are not functions
This is because one x value must not point to several y values
However, there are unique values in the graph of (d)
Hence, (d) the graph is a function
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Please help. Look at photo
The inequality that can be used to find the number of gigabytes used is 52.50+5g<75 and the value of g should be less than 4.5.
According to the question,
We have the following information:
Gabriel pays a flat cost of $52.50 per month and $5 per gigabyte. He wants to keep his bill under $75.
Now, the number of gigabytes used are represented by g.
So, we will have the following inequality:
52.50+5g<75
Now, we will solve this inequality.
Subtracting 52.50 from both the side:
5g<75-52.50
5g<22.5
Dividing by 5 on both the sides:
g<22.5/5
g<4.5
Hence, the inequality that can be used to find the number of gigabytes used is 52.50+5g<75 and the value of g should be less than 4.5.
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When jamel went to the store, he spent $7 on 2. 5 pounds of hamburger meat. What are two different ways to express the rate in this situation?.
These are two ways to indicate how quickly this issue is evolving.
Given;
Jamel bought 2.5 pounds of hamburger meat at the shop for $7. What are the two possible methods to state the rate in this case?
Since he buys 2.5-pound hamburger meat on 7$;
The two ways to explain the rate of this situation is
(I) the amount of meat per $ is 2.5/7 = 5/14
(II) the cost of meat is 7/2.5 = 14/5 = 2.8 /pound
a) The maximum amount of hamburger meat that can be purchased by spending 1 dollar pounds of hamburger meat can be purchased by spending 1 dollar
b) The maximum cost of 1 pound of hamburger meat dollar Thus, 1 pound of hamburger meat costs 2.8 dollars
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Rewrite the following equation in slope-intercept form.
y − 8 = 15 (x + 5)
Write your answer using integers, proper fractions, and improper fractions in simplest form.
OMG GUYS I NEED ANSWER PLEASE HELP I HAVE TO LEAVE REALLY SOON TO GO SOMEWHERE!!!!!!! HELP ASAP!!!!!!! ;0 I HAVE TO LEAVE IN LESS THAN 15 MINUTES AND I STILL HAVE MORE QUESTIONS!!!!!!!!!
The following equation, y − 8 = 15 (x + 5) is in the slope-intercept form and will be y=15x+83.
What is a straight line?A straight line is a combination of endless points joined on both sides of the point.
The slope 'm' of any straight line is given by:
A linear equation has the form y = mx + b in the slope-intercept format. X and Y are the variables in the equation. The values m and b represent the line's slope (m) and the value of y when x is 0.
[tex]\rm m =\dfrac{y_2-y_1}{x_2-x_1}[/tex]
It is given that the equation is,
y − 8 = 15 (x + 5)
y=15(x+5)+8
y=15x+75+8
y=15x+83
A linear equation has the form y = mx + b in the slope-intercept format.
Thus, the following equation, y − 8 = 15 (x + 5) is in the slope-intercept form and will be y=15x+83.
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If there is inverse variation and y = 3 when x = 24 , find x when y = 18 .
The value of x in the inverse variation is x = 4
Inverse variationInverse variation is express mathematically by; y = k/x
where, y and x = variables
k = constant of variation
We solve for 'x' in the variation using standard form for inverse variation:
y = k/x
Given; y = 3, x = 24
We now use the given information to find k.
Step 1: Substitute the given in to equation y= k/x; to
3 =k/24
Cross multiply
k = 3 * 24
k = 72
Step 2; The inverse relation for is y = 72/x since we have gotten k=72
For y = 18, we get
18 = 72/x
Cross multiply
18x = 72
x = 72/18
X=4
Therefore, the value of x = 4.
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Rewrite the equation in Slope-Intercept Form (y = mx + b)
y+1=2(x-4)
Solve:
18+ (6 - 2) × 2 =
Answer:
26
Step-by-step explanation:
18 + (6 - 2) x 2
18 + (4) x 2
18 + 8
= 26
I need to find tan (theta) for angle theta , the angle between the x-axis and the line that connects the origin to point (3,2)
Answer:
tan(θ) = 2/3
Step-by-step explanation:
You want the tangent of the angle θ between the x-axis and the line connecting the origin to point (3, 2).
TangentThe tangent ratio is given by ...
Tan = Opposite/Adjacent
In the attachment, you can see that the side opposite the angle of interest is the y-coordinate of the point. The side adjacent is the x-coordinate. That means ...
tan(θ) = y/x
tan(θ) = 2/3
__
Additional comment
In general, the tangent of the angle a line makes with the x-axis is the slope of the line. Your line has slope 2/3, and that is the tangent of the angle it makes with the x-axis.
a waste management company is designing a rectangular construction dumpster that will be twice as long as it is wide and must hold 29 yd3 of debris. find the dimensions of the dumpster that will minimize its surface area.
The dimensions of the dumpster that will minimize its surface area are Length = 4.43 yds ,Width = 2.215 yds and Height = 2.956 yds
since l = 2w.
Now, the formula for a cube's surface area is;
S = 2lw + 2lh + 2wh.
Changing 2w to l yields;
S = 4wh + 4w² + 2wh.
S = 4w² + 6wh
in the meantime, the formula for a cube's volume is;
V = lwh
add 2w for l to receive;
V = 2w²h
h = V/2w²
In the SA equation, substitute V/2w² for h to get;
SA = 4w² + 6w(V/2w²)
SA = 4w² + 3V/w
V is stated to equal 29 yd3.
Thus;
S = 4w² + 87/w
Let's find the first derivative of S as we want to reduce the surface area;
S' = 8w - 87/w²
At S' = 0;
8w - 87/w² = 0
8w = 87/w²
w³ = 87/8
w = ∛(87/8)
w = 2.215 yds
L = 2 x 2.215= 4.43
since, l = 2w.
l = 4.43 yds
h = V/2w²;
h = 29/(2 × 2.215²)
h = 2.956 yds
Hence, The dimensions of the dumpster that will minimize its surface area is l = 4.43 yds, w = 2.215 yds and h = 2.956 yds
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50 POINTS FOR WHOEVER SOLVES THIS QUESTION! PLEASE AND THANK YOU!!
Answer:
hello as midpoint is (4,-3)
and an ending point is (8,-5)
there are 4x and 2y among them
so you need to subtract 4x and 2y from the midpoint
which the answer is going to be (0,-1)
i.e. C option
good luck
here's another question
please help ASAP! no BS!
Answer:
[tex]y=-\frac{1}{3}x +4[/tex]
Step-by-step explanation:
slope= 1-7/9- -9= -1/3
y-intercept: 7 = -1/3(-9)+b, b=4
PLEASE HELP THIS IS SO HARD!
IT'S ABOUT ANGLES!
The measure of angle ABD is 118 degree.
What is an equation?An equation is an expression that shows the relationship between two or more numbers and variables.
WE have been given that the angles are;
(3x +10)° and 2x
WE need to solve the value of x then we use the linear pair;
(3x +10)° + 2x = 180
Solving;
(3x +10)° + 2x = 180
5x + 10 = 180
5x = 180 - 10
5x = 170
x = 36
Angle ABD = (3x +10)° = 3(36) + 10
= 108 + 10
= 118
Hence, the measure of angle ABD is 118 degree.
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how do I round 9.4725 to the nearest cent with no dollar sign
Answer:
9.47
Rounded to the nearest 0.01 or
the Hundredths Place.
Explanation
9.4725
You rounded to the nearest hundredths place. The 7 in the hundredths place rounds down to 7, or stays the same, because the digit to the right in the thousandths place is 2.
9.47
When the digit to the right is less than 5 we round toward 0.
9.4725 was rounded down toward zero to 9.47
Hope this helps!
The two-way frequency table contains data about students’ preferred exercise.
What is the joint relative frequency of students who do not like to run and enjoy swimming?
A) 23%
B) 37%
C) 46%
D) 72%
it's 23% because 46 (ppl who do not like running but like swimming) divided by 200 (the total for everything) is 0.23 which is 23%
Find the value of each variable.
Simplify your answers as much as possible.
If necessary, you may learn what the markings on a figure indicate.
The value of variable in first figure will be;
⇒ x = 5
The value of variable in second figure will be;
⇒ y = 4
What is mean by Triangle?
A triangle is a three sided polygon, which has three vertices and three angles which has the sum 180 degrees.
Given that;
There are two figures is shown in figure.
Now,
In first figure;
By using definition of proportional as;
⇒ 4 / 2 = 6 / (x - 2)
Solve for x as;
⇒ 2 (x - 2) = 6
⇒ x - 2 = 3
⇒ x = 3 + 2
⇒ x = 5
Thus, The value of variable in first figure will be;
⇒ x = 5
In second figure;
By using definition of proportional as;
⇒ y / 6 = 12 / 9
Solve for y as;
⇒ y / 6 = 4 / 3
⇒ y = 4 x 6 / 3
⇒ y = 24 / 6
⇒ y = 4
Thus, The value of variable in second figure will be;
⇒ y = 4
Therefore, The value of variable in first figure will be;
⇒ x = 5
The value of variable in second figure will be;
⇒ y = 4
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Can someone please help me!? I have the file for the question right under.
The diagram which represents Mason's ratio of made throws and missed throws in the story is option A.
The total number of free throws attempted by Mason If Mason made 20 free throws is 28 free throwsThe diagram which represents Jennifer's ratio of bracelet made with neon and bracelet made with pastel in the story is option BThe number of bracelet Jennifer made with pastel if she made 16 bracelet with neon is 12.The following are answers to like terms collected respectively
9d17r + 35r + 4The following expressions are equivalent
3 + 4 = 2 + 54(2 + x) = 8 + 4xHow to use tape diagram to represent ratio?Throws Mason made = 5Throws Mason missed = 2If Mason made 20 free throws
Number of throws Mason missed = xEquate missed throws ratio made throws
2 : 5 = x : 20
2/5 = x/20
cross product
2 × 20 = 5 × x
40 = 5x
divide both sides by 5
x = 40/5
x = 8
Total free throws Mason attempted = Number of throws Mason missed + Number of throws Mason made
= 8 + 20
= 28 free throws
Number of friendship bracelet made with neon = 4Number of friendship bracelet made with pastel = 3If Jennifer made 16 bracelet with neon
Number of bracelet made with pastel = xEquate neon made bracelet ratio pastel made bracelet
4 : 3 = 16 : x
4/3 = 16/x
cross product
4 × x = 3 × 16
4x = 48
divide both sides by 4
x = 48/4
x = 12
Combine the like terms
4d + 5d
= 9d
8r + 6 + 9r - 3
= 8r + 9r + 6 - 3
= 17r + 3
6r - r + 4
= 5r + 4
Determine if the following expressions are equivalent
3 + 4 = 2 + 5
7 = 7
4(2 + x) = 8 + 4x
8 + 4x = 8 + 4x
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