Answer:
:::::::::
C. 6:7 = 18:21
answer: it is C
Step-by-step explanation:
6 = 18 because 6 times 3 is 18. And 7 times 3 = 21. so they are both equivalent.
hope it helps :)
What is the value of C in the matrix equation below
A line that passes through the point (-4,6) with a slope of 2. The equation of that line in slope is y=......... X+?
Answer:
y=2x-2
Step-by-step explanation:
Compare y= -3x + 2 and x - 3y = 9.
What is sin49° to the nearst tenth
Answer:
The sin of 49 degrees is 0.75471.
Step-by-step explanation:
To obtain 49 degrees in radian multiply 49° by pi/ 180° = 49/180pi. Sin 49degrees = sin (49/180 × pi) .
What is the measure of angle x
If AB = 10 and m_A = 20° , find AC . Round to the nearest tenth.
Answer: 9.397
Step-by-step explanation: c = a·sin(C)/sin(A) = 9.39693
A plane flies 450 miles with the wind, and 350 miles against the wind (in the same amount of time). If the wind is blowing at 30 mph, how fast would the plane be going without air helping/hurting?
Answer: = 240 mph.
Step-by-step explanation:
Let x = speed of the plane.
t= time taken
As per given, we have
[tex]t=\dfrac{450}{x+30}\ \ \ ...(i)\\\\ t=\dfrac{350}{x-30}\ \ \ ...(ii)[/tex] [Time = distance / speed]
From (i) and (ii), we get
[tex]\dfrac{450}{x+30}=\dfrac{350}{x-30}\\\\\Rightarrow\ 450(x-30)=350(x+30)\\\\\Rightarrow\ 450x-13500=350x+10500\\\\\Rightarrow\ 450x-350x=10500+13500\\\\\Rightarrow\ 100x=24000\\\\\Rightarrow\ x=240[/tex]
Hence, the speed of the plane = 240 mph.
Pls help with this question pls and thx!
Mr. Nelson sold a car for $1,380 that cost
him $1,500. What was his percent of loss
based on the cost?
Answer:
The loss is $120 and the loss percentage is 8%.
Step-by-step explanation:
Given that,
SP of a car = $1,380
CP of a car = $1,500
As CP > SP, it means there is a loss in selling of that car.
Loss = CP - SP
= $1,500 - $1,380
= $120
Loss percentage,
[tex]\%=\dfrac{loss}{CP}\times 100\\\\=\dfrac{120}{1500}\times 100\\\\=8\%[/tex]
Hence, the loss is $120 and the loss percentage is 8%.
Will mark brainliest :) Given vectors u = -9i + 8j and v = 7i + 5j find 2u -6j in terms of unit vectors i and j
(answer choices below vv)
Answer:
the answer is option number b..
5. Carlotta's Beauty Supply store sells two brands of bar soap. A 6 pack of Brand A costs
$6.78 and an 8 pack of Brand B costs $8.40. What brand is the better buy?
plz help meeeeeeeeeeeeeee
Answer:
A
Step-by-step explanation:
16ft by 24ft what is the are?
Students in a representative sample of 69 second-year students selected from a large university in England participated in a study of academic procrastination. Each student in the sample completed the Tuckman Procrastination Scale, which measures procrastination tendencies. Scores on this scale can range from 16 to 64, with scores over 40 indicating higher levels of procrastination. For the 69 second-year students in the study at the university, the sample mean procrastination score was 41.00 and the sample standard deviation was 6.85.
Required:
a. Construct a 95% confidence interval estimate of μ, the population mean procrastination scale for second-year students at this college.
b. How does the confidence interval for the population mean score for second-year students compare to the confidence interval for first-year students of (35.447, 38.633)?
Answer:
a) The 95% confidence interval estimate of μ is (39.35, 42.5).
b) Second-year students tend to procrastinate more than first-year students
Step-by-step explanation:
We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.
The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So
df = 69 - 1 = 68
95% confidence interval
Now, we have to find a value of T, which is found looking at the t table, with 68 degrees of freedom(y-axis) and a confidence level of [tex]1 - \frac{1 - 0.95}{2} = 0.975[/tex]. So we have T = 1.9955
The margin of error is:
[tex]M = T\frac{s}{\sqrt{n}} = 1.9955\frac{6.85}{\sqrt{69}} = 1.65[/tex]
In which s is the standard deviation of the sample and n is the size of the sample.
The lower end of the interval is the sample mean subtracted by M. So it is 41 - 1.65 = 39.35
The upper end of the interval is the sample mean added to M. So it is 41 + 1.65 = 42.65
The 95% confidence interval estimate of μ is (39.35, 42.5).
b. How does the confidence interval for the population mean score for second-year students compare to the confidence interval for first-year students of (35.447, 38.633)?
The confidence interval for second-year students had higher values both at the lower and the upper end of the interval, which means that they tend to procrastinate more than first-year students
Solve for the following by
FACTORING:
x2 + 11x + 28 = 0
Step-by-step explanation:
(x+7)(x+4)
x = -4 and -7
have a nice night
Answer:
Alternate forms:
(x + 4) (x + 7) = 0
(x + 11/2)^2 - 9/4 = 0
Solutions:
x = -7
x = -4
Step-by-step explanation:
HOPE THIS HELPSSS
Need help please and thank you have a nice day
Answer:
106 is the correct answer
FOR BRAINLIST!! and points
Answer:
A
Step-by-step explanation:
The answer is A. The initial weight is known so it can’t be mutipliy with a variable. We don’t know how many weeks he will lose weight, but we know that the goal is 228 and that he had planned to lose 2 pounds per week
so 2 multiply the weeks, the variable
Please help asap will give brainliest
Answer:
I cant see the choices
Step-by-step explanation:
Please help meeeee I’m desperate
Answer: I believe the Big B is 169 and the perimeter is 52
Step-by-step explanation:
I WILL MARK BRAINLIEST! NO LINKS OR IMAGES.
Conducting a survey best fits which step of the statistical process?
Form a question that can be answered by data.
Design and implement a plan that collects data.
Analyze the data using graphical and numerical methods.
Interpret and compare the data.
Answer:
Design and implement a plan that collects data.
Step-by-step explanation:
Answer:
Design and implement a plan that collects data.
Step-by-step explanation:
Looking at the answer choices, we can use the process of elimination:
1) Form a question that can be answered by data.
2) Design and implement a plan that collects data.
3) Analyze the data using graphical and numerical methods.
4) Interpret and compare the data.
1) The question is most likely already formed, as a survey cannot be conducted without a question or objective. Not 1.
2) A survey collects data.
3) This happens after the collection of data, or the survey. Not 3.
4) This also happens after the collection of data, or the survey. Not 4.
Tim spent $8.16 on 12 pounds
of Sweet-smarts. How much is one
pound of Sweet-smarts?
Answer:
1.47058823529
Step-by-step explanation:
Round if needed
Answer:
Tim is gonna get diabetes >:(
Step-by-step explanation:
but your answer is .68 cents lol
Mrs. Stancil is planning to use
wrapping paper to cover a gift box that is the
shape of a rectangular prism with dimensions of
3ft by 4ft by 5ft. If the wrapping paper costs
S0.05 per square foot, how much will it cost?
Answer:
4.70
Step-by-step explanation:
there are 6 sides on a box
2 sides are 12 square feet (3*4), 2 sides are 15 square ft (3*5), and 2 sides are 20 square ft (4*5)
12*2+15*2+20*2=24+30+40=94 square feet
if each square foot costs $0.05 (I think that's what it says) then you would do 94*0.05= $4.70
so, your answer is $4.70
Not sure if this is right, but I tried
Sherrie just registered for her wedding. So far 6 items have been purchased from her list. Find the MEAN price of the purchased items.
$29, $58, $15, $129, $75, $22
**Round to the nearest tenths EX. 18.6**
Answer:
54.6
Step-by-step explanation:
29+58+15+129+75+22= 328
328÷6= 54.6666666667
round to the nearest tenth= 54.6
HELPPP PLEASE HELP A GIRL OUT
Answer:
I am guessing A or C.
Step-by-step explanation:
Hope this helps you :)
angela is seeking a venue for her school’s athletic council banquet.Primo Banquet Hall charges $2000 plus $50 per person.The Lookout Banquet Hall charges $1500 plus $75 per person.
a)write an equation to represent each banquet hall
b)when do both halls charge the same amount
c)which hall should angela choose?explain indicating intervals
The quotient of a numberpo, and five
Please help
Answer:
x over 5 or x divided by 5
Step-by-step explanation:
x over 5 : [tex]\frac{x}{5}[/tex]
x divided by 5 : x ÷ 5
Help me please! :Will give brainliest!:
Answer:
Step-by-step explanation:
Anything that is multiplied greater than 1 will be greater than what the other factor is. You are correct!
Answer:
B, 2 5/6 x 2 5/6
Step-by-step explanation:
This is the only answer that is greater than 2 5/6
Zoe drove 55 miles in 11/12 hours. On average, how fast did she drive, in miles per hour?
Answer:
60
Step-by-step explanation:
So, first we need to divide the miles(55) by the time(11).
This should look like:
55/11
=
5
This should get you 5. Now lets multiply the 5 by the total time(12).
This should now look like:
5x12
=
60
This should get you 60. This is the answer.
If you want to solve more of these, here is a step-by-step:
Divide the value by the first time.Take the new value.Multiply it by the second time.This is your answerLets try another example:
Bob the builder made a 5 story building in 8 hours. How many stories on a building can Bob make in 24 hours?
Lets start with step 1. Divide the 5(value) by the 8(first time).
You should get 5/8 which is a bit of a strange number:
0.625
Now lets do step 2. Take the new 0.625 value.
Now to step 3. Lets multiply that value by the 24(second time)
This should get you 0.625x24:
This will get you 15
So your answer IN THE EXAMPLE I MADE is:
15 stories
Hope this make sense and helps you with your math ;)
Please can someone help me. It’s not 26, please find X
[tex]8 \div \frac{2}{3} [/tex]
I need this is an improper fraction
Answer:
you could just do 12/1 or let 8 turn into 24/3
Step-by-step explanation:
on step 1 we should do reciprocal
on step 2 we should multiply
on third step 3 we should divide
so the answer is 12