Answer:
Step-by-step explanation:
Number of pounds for 4.75 = 4.75 ÷ 1.90 = 2.5 pounds
A research team is testing whether a fuel aditive increases a car's gas mileage. The maker of the additive claims that the additive will increase a car's gas mileage by at least 6 mpg. Among 25 cars that were treated with the additive, the average increase in mileage was 5.3 mpg with a standard deviation of 1.8 mpg. The research team found the z-score to be -1.94. Is there enough evidence to reject the company's evidence?
Answer:
Yes there is sufficient evidence to reject the company's evidence
Step-by-step explanation:
From the question we are told that
The sample size is n = 25
The mean is [tex]\= x = 5.3 \ mpg[/tex]
The standard deviation is [tex]\sigma = 1.8 \ mpg[/tex]
The z-score is z = -1.94
The null hypothesis is [tex]H_o : \mu = 6 \ mpg[/tex]
The alternative hypothesis is [tex]H_a : \mu \ne 6[/tex]
Generally the p-value is mathematically evaluated as
[tex]p-value = 2 * P( Z <-1.94)[/tex]
From the z table the area under the normal curve to the left corresponding to -1.94 is
[tex]P( Z <-1.94) = 0.02619[/tex]
=> [tex]p-value = 2 * 0.02619[/tex]
=> [tex]p-value = 0.052[/tex]
Let assume the level of significance is [tex]\alpha = 0.05[/tex]
Hence the [tex]p-value > \alpha[/tex] this mean that
The decision rule is
Fail to reject the null hypothesis
The conclusion is
There is sufficient evidence to reject the company's evidence
Does anyone know this one I will give 25 points
Answer:
C
Step-by-step explanation:
I think, I’m not so sure.. But if I am correct, the table shows capable coordinates.
In order to train for a marathon, Janelle researches training programs. One training program suggests running 396 miles over a period of 22 weeks. What is the average number of miles Janelle will run each week in this program?
Answer:
18 miles per week
Step-by-step explanation:
396/22 is 18miles/week
a tank containing 64 gallons lost 6 1/4% through leakage. How much remained in the tank?
Answer:
60 gal
Step-by-step explanation:
1/2z+6=3/2(z+6) need the answer asap
Answer:
z = -3
Step-by-step explanation:
[tex]\frac{1}{2}[/tex]z+6 = [tex]\frac{3}{2}[/tex](z+6)
Expand and cancel out brackets.
[tex]\frac{1}{2}[/tex]z+6 = [tex]\frac{3}{2}[/tex]z +
Simplify.
[tex]\frac{1}{2}[/tex]z+6 = [tex]\frac{3}{2}[/tex]z + 9
Isolate x and numbers.
[tex]\frac{3}{2}[/tex]z - [tex]\frac{1}{2}[/tex]z = 6-9
Simplify.
[tex]\frac{2}{2}[/tex]z = -3
z = -3
Answer:
z=−3
Step-by-step explanation:
1/2*z+6-(3/2*(z+6))=0
Simplify 3/2
1 3
((— • z) + 6) - (— • (z + 6)) = 0
2 2
Simplify 1/2
Rewrite the whole as 6.1 Pull out like factors :
-2z - 6 = -2 • (z + 3) a fraction using 2 as the denominator.
-z - 3 = 0
7.1 Solve : -z-3 = 0
Add 3 to both sides of the equation :
-z = 3
Multiply both sides of the equation by (-1) : z = -3
PLEASE PLEASE PLEASE HELP ME PLEASE!!
Answer:
x=14 to make the pay equal.
Step-by-step explanation:
Okay so what I did here is kind of time-consuming and I'm sure there's a better way, but I used a calculator to substitute a lot of different numbers into the equation to make it equal, and when I got to 14, the equations both ended up as 625.
please help asap, will mark brainliest
Answer:
The answer is 122.07 if you round it, but the full decimal is 122.065556157
Pls help me this is due tmr morning
what percentage of students earned A’s on their paper ?
Answer:
21% or C
Step-by-step explanation:
If 60 students either didn't pass, got Cs or Bs, then 16 out of the 76 got As which is 21 percent.
❗️❗️❗️Solve❗️❗️❗️
6(x^2)-2x-4
Answer:
x=-1
Step-by-step explanation:
Traci collects donations for a dance marathon. One group of sponsors will donate a total of $6 for each hour she dances. Another group of sponsors will donate $75 no matter how long she dances. What number of hours, to the nearest minute, should Traci dance if she wants to raise at least $1,000?
Answer:155 hours
Step-by-step explanation:
$75+$6h=$1,000
Subtract $75 on both sides:
$75-$75+$6h=$1,000
$6h=$925
Divide 6 on both sides:
6/6h=925/6
h=154.1666667
After I rounded it and it was 155 hours
Solve the inequality.
y – 2 > 3
Answer:
hi
Step-by-step explanation:
im trying my best ill come back to this rn
500mL is about how many cups
A: 1.1
B: 10
C: 8
D: 2.5
Answer:
the answer would be D.
Step-by-step explanation:
500 mL as cups is actually around 2.11, but since 2.5 is the closest answer, I would say it is D.
Brainliest if i am right? uwu
Which of the images above represents a proof of the Pythagorean Theorem? Explain your choice, and then explain how the figure proves the Pythagorean Theorem.
Answer:
9
Step-by-step explanation:
In a survey of 2,700 people who owned a certain type of car, 1,755 said they would buy that type of car again. What percent of the people surveyed were satisfied with the car?
Answer:
65%
Step-by-step explanation:
survey of 2,700 people who owned a certain type of car, 1,755 said they would buy that type of car again. What percent of the people surveyed were satisfied with the car?
Total car number of car owner= 2,700
Then the percentage that satisfied is
1,755
1755/2700*100= 65%
What is the area of the figure down below
Please help me I don't understand the equation
Answer:
0.00284090909
Step-by-step explanation:
It’s basicly a unit conversion that converse whatever you have to miles/h, so you are getting a miles and get a time and do the math, the final answer will be 180/(5280*12)=0.00284090909
The domain of the following relation R {(3, -2), (1, 2), (-1, -4), (-1, 2)} is
A. {-1, 1, 3}
b. {-1, -1, 1, 3}
с. {-4, -2, 2, 2}
d. {-4, -2, 2}
Use the coordinates J(7, 8), K(1, 2) and L(5, 2) for AJKL.
The centroid for AJKL is at point M. What is JM rounded to the nearest tenth?
A.)2.4
B.) 4.3
C.) 4.8
D.) 7.2
Answer:
4.3
Step-by-step explanation:
BRAINLIEST + FRIEND IF U ANSWER MY QUESTION!!!
Answer:
Sam Houston
Step-by-step explanation:
HOPE THIS HELPS
PLZZ MARK BRAINLIEST
Answer:
I think it's D. Sam Houston
Step-by-step explanation:
A deposit plus $8 per hour.
Answer:
1, 2 or 3 hours
Step-by-step explanation:
The inequality would be $20+$8x ≤ 50
$20 deposit plus $8 per hour times the # hours so you don't go over $50 so x could be 1,2,or 3 hrs.
Please help! Asap! i will give brainiest to whoever gives correct answer please help
Answer:
It is C. with x as 1 and y as 5
Step-by-step explanation:
The third choice (first values are x=1,y=5)
This is the only choice in which there is a direct, linear constant relationship between x and y. the equation would be x=5y.
Solve the inequality.
2(4x-3) 2-3(3x) + 5X?
Answer:
x[tex]\geq[/tex]0.5
Step-by-step explanation:
This package of sliced cheese costs $2.97. How much would a package with 18 slices cost at the same price per slice?
Answer:
$53.46
Step-by-step explanation:
The answer is 53.46 because 2.97 multiplied by 18 is 53.46
What is an equivalent fraction to 10/20?
Answer:
1/2
Step-by-step explanation:
Please help me with this math problem and i will mark u brainliest
Answer:
202.4 - 27 * 3 Add.
202.4 - 81 Multiply.
121.4 Subtract.
Step-by-step explanation:
I solved it from the "add" step, since you already did the rest. The problem was completed by just following the order of operations: PEMDAS.
PLZ PLZ PLZ HELP ME!!!!! I know this is alot to ask for but i need help. Im doing this test in math and i don't wnat to fail. PLZ PLZ PLZ HELP ME. Oh and #10 has a typo it is swimming 10ft. the question doesnt has 10ft on it. PLZ HELP ME
Answer:
1). 14-22
if you take 22 away from fourteen, you get negative what? Its pretty simple it’s just subtraction. 11). Mark has NEGATIVE 5. Maria has POSITIVE 2. The positive number will always be greater than the negative number.
Let me know if you need additional help :)
hi ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Helpppppppp asap please with calculations pls pls pls
Answer:
For the first one it is y = -5x because for it to be direct it can't have a b-intercept. it must start at 0.
Second question: y2 - y1/x2 - x1
13-(-8)/(-4)-3
21/(-7)
-3 is the slope
y= -3x + b
13 = -3(-4) + b
13 = 12 + b
12 - 13 = b
b = -1
y=-3x-1
0 = -3x - 1
1 = -3x
1/-3 = -3x/-3
x= -1/3
y=-3x-1
y=-3(0)-1
y= -1
The answer to the 3rd question is y = 1x + 2 because the rise over run is one and the line crosses the y-intercept at 2.
I am not sure if these answers are correct.
7. Is y = x - 4 a linear function?
Answer:
yes it is cause it has a slope and stuff
Answer:
yes
Step-by-step explanation: