Which statement best describes the effect of the confounding variable?
A.
B.
C.
D.
Answers
Answer:
D
Step-by-step explanation:
Answer:
(D) Because vehicles of different sizes may respond differently to the additive, it may be difficult to conclude whether the additive improves gas mileage for all vehicles.
ED2021
Related Questions
If ray earns $120 for 15 hours of work, how much will he earn for 20 hours of work at the same rate
Answers
Find his rate:
120 / 15 = $8 per hour
Multiply the rate by hours:
$8 x 20 hours = $160
He will earn $160
−2x−(−5−4x)=−5(2x−7)
Answers
Answer:
x = 2.5
Step-by-step explanation:
- 2x - ( - 5 - 4x ) = - 5 ( 2x - 7 )
- 2x + 5 + 4x = - 10x + 35
- 2x + 5 + 4x = - 10x + 35
- 2x + 4x + 10x = 35 - 5
12x = 30
x = [tex]\frac{5}{2}[/tex] = 2.5
Check the answer:
L.H.S. = - 2(2.5) - [ - 5 - 4(2.5) ] = 10
R.H.S. = - 5 [ 2(2.5) - 7 ] = 10
The quotient of m and 7.
Answers
Piper used 1/5 meter of ribbon to create a border around a triangle if each side of the triangle is the same length how much ribbon did Piper use for each side?
Answers
Answer:
[tex]\frac{1}{15}[/tex]
Step-by-step explanation:
as said in the question that the triangle has three equal sides. i.e. this is an equilateral triangle. So,
let us consider one side of the triangle to be x . and 3x( x+x+x) should be equal to 1/5
[tex]x+x+x = \frac{1}{5}\\3x=\frac{1}{5}\\x = \frac{1}{5} / 3\\x = \frac{1}{5} * \frac{1}{3}\\x = \frac{1}{15}[/tex]
Prompt: A car is traveling down a highway at the constant speed, described by the equation “d=65t” , where “d” represents the distance, in miles, that the car travels at this speed in “t” hours.
Question 1:
1. What does 65 tell us in this situation?
a. The car travels 65 miles in 1 hour.
b. The constant of proportionality is 65 miles per hour.
c. The car traveled a total of 65 miles
d. The car is traveling 65 miles per hour.
—————————————————————
Question 2:
2. How many miles does the car travel in 1.5 hours?
The car travels □ miles in 1.5 hours.
—————————————————————
Question 3:
3. How long does it take the car to travel 26 miles at this speed?
“Type your response in the down below”
Please Help!
Answers
Answer:
1) d
2) 97.5 miles
3)I am unsure on
Step-by-step explanation:
1) d=65t means that it is moving 65 miles per that amount of time (in this case using mph)
2) you take your equation "d=65t" and fill in your time (1.5) 65(1.5)=97.5
3) I don't know but possibly 2.5 minutes? (65/25) but I'm not sure I'm sorry
Last year, 120 students were sick at school. This year, 20% fewer students are sick. How many students are sick this year?
Answers
Answer:
96
Step-by-step explanation:
2)
Mike went to the doctor and was found to be 20 pounds overweight.
The doctor discovered that Mike ate an average of 2000 calories per
day. He said for Mike to lose weight and meet his goal, the maximum
amount of calories he could eat per day was 1750. How many calories
will Mike be cutting out each week (7 days)?
Answers
Answer:
1750 Calories
Step-by-step explanation:
2000-1750=250
250x7=1750
What is the value of 2 in 8.702
Answers
Answer:
the value of 2 in the number 8.702 is 0.002 which is 2 thousandths
Solve the inequality below
-8x + 4 > 20
Include x and number in answer
Answers
Answer:
x<-2
Step-by-step explanation:
You first subtract 4 from both sides. Then you divide both sides by -8 (note: when you multiply or divide by a negative the sign flips. Then you get your answer
Students in a sixth-grade class are raising money for an end-of-year camping trip. So far, they have raised $240. This is 2/5 (two-fifths) of the cost of the trip. How much does the trip cost?
Answers
Answer:$300
Step-by-step explanation:
120 is 1/5 of the raised money, therefore if you miltiple 120 by 5 you should get your answer.
Answer:
.
Step-by-step explanation:
A garden has 8 rows of plants. Each row has 12 tomato plants and 3 bean plants.
How many more tomato plants than bean plants are in the garden?
Answers
PLEASE HELP 50 POINTS!!
Answers
Answer:
Step-by-step explanation:bdhdhshsbnskaosnndndkwo
Answer:
(5x * 1y) + (1x * 3y)
Step-by-step explanation:
Feel free to give brainliest
Have a great day!
Please answer, 50 points and I gotta finish this test
What is the radical in simplest radical form? Please show all steps
sqrt 5/8 (Square root, 5 out of 8 as a fraction)
Answers
The square root of 8 in radical form is represented as √8 which is also equal to 2√2 and as a fraction, it is equal to 2.828 approximately. Squares root of a number is the number, which, on multiplying by itself gives the original number. Since 8 is not a perfect square, hence the value is represented in root form.
Factor f(x)= 2x^4 -12x^3 +6x +20x and please show all steps
Answers
Round 985, 932 to the nearest thousand.
Answers
Answer:
900
Step-by-step explanation:
Which of the following values are solutions to the inequality –9 – 5x > -1?
I. 2
II. - 5
III. – 10
Answers
Answer:
20)12
Step-by-step explanation:
Answer:
x < -8/5
Step-by-step explanation:
-9 - 5x > -1
-5x > 8
x < -8/5
Find the value of the probability of the standard normal variable Z corresponding to this area for problems 1-3.
Answers
Answer:
Explained below.
Step-by-step explanation:
The complete question is:
Find the value of the probability of the standard normal variable Z corresponding to this area for problems 1-3.
1. P(Z < 1.62)
2. P(Z > -1.57)
3. P(-1.41 < Z < 0.63)
Solution:
Use Excel to solve the problems.
(1)
P(Z < 1.62) =NORM.S.DIST(1.62,TRUE)
= 0.9474
(2)
P(Z > -1.57) = P (Z < 1.57)
=NORM.S.DIST(1.57,TRUE)
= 0.9418
(3)
P(-1.41 < Z < 0.63) = P (Z < 0.63) - P (Z < -1.41)
=NORM.S.DIST(0.63,TRUE) - NORM.S.DIST(-1.41,TRUE)
= 0.7357 - 0.0793
= 0.6564
The term "jet stream" is often used by weather forecasters to describe
A: The cloud-like condensation trails that are sometimes seen behind jet aircraft.
B: Warm pacific winds associated with volcanic activity in the western pacific which carry heat to the north pole
C: Solar winds that bring high energy particles to the upper atmosphere, providing heat which sets off convection cycles disturbing weather in the tropical latitudes
D: The west to east winds that circle the globe, often just below the poles in latitude and just beneath the stratosphere in elevation
Answers
Answer:
daddy chill what does the man say?
Step-by-step explanation:
???
Plssss help me omg
If AB = BC and AB = 50-2x and BC = 8x +5, find the length of AB.
0 20.8 units
O 41.0 units
O 4.5 units
O 8.4 units
Answers
If you look at the picture I showed my work, but if you substitute the variables for their corresponding equations then equal them and solve you get 4.5.
A train traveled from one city to another city in 4 hours at a speed of 70 mph.
The retum trip was made in 5 hours. Find the speed for the return trip.
Answers
Answer:
56miles/hr
Step-by-step explanation:
Given parameters:
Time taken for the to travel = 4hrs
Speed of the train = 70mph
From this data, let us find the distance of the trip;
Distance =Speed x time
Therefore, insert the parameters;
Distance = 70mph x 4hr = 280miles
Now;
Return trip took, 5hrs,
Speed = ?
Speed = [tex]\frac{distance}{time}[/tex]
Insert the parameters and solve;
Speed = [tex]\frac{280}{5}[/tex] = 56miles/hr
When designing a study to determine this population proportion, what is the minimum number of drivers you would need to survey to be 95% confident that the population proportion is estimated to within 0.04
Answers
Answer: 601
Step-by-step explanation:
The formula to find the minimum sample size(n) , if the prior population proportion is unknown:
[tex]n=0.25(\dfrac{z^c}{E})^2[/tex], where E = margin of error , [tex]z^c[/tex] = critical z-value for confidence level c.
Given : E = 0.04
Z-value for 95% confidence = 1.96
So, the minimum sample size required = [tex]0.25(\dfrac{1.96}{0.04})^2=0.25(49)^2[/tex]
[tex]= 0.25\times 2401=600.25\approx601[/tex]
Hence, the minimum sample size required = 601
Which best represents the greatest amount of change that took place from one day to the next day over the four-day period?
Answers
Answer:
A loss of 93.98 points. Hope this is helpful!
Step-by-step explanation:
Answer:
fat dickaling
Step-by-step explanation:
HELPPPPP
RuthAnn is 28 years old and is retiring at the age of 65. When she retires, she estimates that she will need an annual income of $32,523 for 30 years. If RuthAnn contributes 11% of her annual income to a 401(k) paying 7.1% compounded annually, will she reach her goal for retirement given that her annual income is $36,278.13? If she does not make her goal then state by what amount she will need to supplement her income. Round all answers to the nearest cent.
a.
RuthAnn will meet her annual goal of exactly $32,523 for retirement.
b.
RuthAnn will meet her annual goal of $32,523 for retirement with an excess of $20,791.60.
c.
RuthAnn will not make her annual goal of $32,523 and will need $1,039.85 to supplement her yearly income when she retires.
d.
RuthAnn will not make her annual goal of $32,523 and will need $10,395.80 to supplement her yearly income when she retires.
Answers
Answer:
It's actually b
Step-by-step explanation:
Help me
Solve 5n = 35.
Answers
Answer:
n=7
Step-by-step explanation:
7 times 5 equals 35.
Answer:
n=7
Step-by-step explanation:
Give:5n = 35
To solve the n. we need to divide both side by 5.
5n/5=35/5
n=7
Given f(x) = 3x + 9, find x when f(x) = 21.
A)
3
B)
4
C)
7
D)
10
Answers
Answer:
B)
Step-by-step explanation:
3(4) + 9 = 21
PLS HELP
John was 3 5/8 feet tall when he was three years old. He is now 6 1/4 feet tall. How many feet did he grow in total?
Prediction:_________________________________________________
Expression: ______________________________
Simplify
Answers
turn the 5/8 into 2.5/4 then add 1/4. Now it is 3.5/4. Add 3 + 6 = 9 so you add the 3.5/4 and it turns into 9 3.5/4. Subtract 3 and you get your answer?
-Can I please have Brainliest
A train travels 20 feet in 1/5 second. At this same speed how many feet will it travel in three seconds
Answers
Answer:
It will travel 300ft. in three seconds
Step-by-step explanation:
identiy why trade improved during the middleages.
this is the question.
Answers
Answer:
intermarriage
Step-by-step explanation:
people from different part intermarried
Answer:
dont know
Step-by-step explanation:
5d divided by c+2;let d=10,c=5
Answers
Answer:
here is the answer in photo form
Answer:
Step-by-step explanation:
Simple and best practice solution for (c-5)d=2 equation. ... If it's not what You are looking for type in the equation solver your own equation and let us solve it. ... 2 + 5d cd = 2 + 5d Divide each side by 'd'. c = 2d-1 + 5 Simplifying c = 2d-1 + 5 Reorder ... 11/4-t8 | | (3x^2+5x+2)+(4x^2+3x+2)= | | 4Y+7-Y=4+2Y-8 | | 10x+190=360 ...
For example, let's say with have the equation x+5 ... If we evaluate the same expression when x=10 , we get: 3(10)+7=30+7=37 . Here's a variable expression with two variables : 3x−2y ... How do you express the phrase "a number z divided by 19" as an algebraic expression? ... How do you simplify 11c+5d−9c−9d?Let the number of cows be x and their legs be 4x. ... or, x = 7 [dividing by 2 on both sides]. ... The roots of the equation ax2 + bx + c = 0 will be reciprocal if: ... A circle of radius 10 inches has its center at the vertex C of an equilateral triangle ABC ... (a) 15, (b) 30, (c) 60, (d) 90, (e) 120. Circle Problem Answers. Answer: (b) 5.
I can’t find the answer tried twice probably easy for others
Answers
Slope intercept form is written as y=mx+b, with m being the slope and b being the y intercept.
The slope is negative one. To find the slope, use the formula y1-y2/x1-x2. When you substitute, you may get -4-1/2-(-3). When you solve it, you get -5/5, or -1.
To find the y intercept, look where the line crosses the y axis (vertical line). In the graph, it crosses as -2. Substitute these numbers into the equation and you get y=-1x-2 which can be simplified to y=-x-2.