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Related Questions
A researcher is interested in consumer preferences among three brands of yogurt. A sample of 90 people is obtained,
and each individual is asked to taste each brand and then select his/her favorite. The resulting frequency data are as
follows:
Brand A
Brand B Brand C
37
21
32
Do the data indicate any significant preferences among the three brands? Test at the .05 level of significance.
State the null hypothesis (1 point), the expected frequency for each category (3 points), the value of chi-
square (4 points), the df (1 points), the critical value of chi-square (2 points), and the decision regarding
significance (1 points).
Answers
Answer:
Step-by-step explanation:
From the given information:
The null hypothesis: all three brands are equally likely to their expected value
The alternative hypothesis: preferences exist among the three brands i.e. at least one is different from the expected value.
The expected frequency = [tex]f_e[/tex]
The observed frequency = [tex]f_o[/tex]
[tex]f_e[/tex] [tex]f_o[/tex] [tex](f_o- f_e)^2[/tex] [tex]\dfrac{(f_o - f_e)^2}{f_e}[/tex]
37 30 49.00 1.633
21 30 81.00 2.700
32 30 4.00 0.133
[tex]X^2 = \sum\dfrac{(f_o-f_e)^2}{f_e} = 4.47[/tex]
Degree of freedom = [tex](n-1)[/tex]
= 3 -1
= 2
At ∝ = 0.05 and df = 2
The critical value [tex]X^2_{0.05, 2}= 5.99[/tex]
Decision rule:
Since the calculated chi-square is less than the critical value, we do not reject the null hypothesis.
Thus, the null is retained with a calculated chi-square value of 4.47 and a critical chi-square value of 5.99.
Find the values of the variables in the parallelogram.
Answers
Step-by-step explanation:
We can find x very easily because the left and right sides are parallel,making the diagonal connecting them a transversal therefore x=33°
To find y we know that the sum of interior angles of a triangle is 180°
y+109°+33°=180°
y+142°=180°
y=38°
Now,
x+38°+z=180
33+38+z=180
z=180-71=109°
3 Drag the tiles to the boxes to form correct pairs. Match the expressions with the property used to generate 5y + 2y+ 6+2. Distributive Property 6y - y + 2y + 10 - 4 + 2 5y + 2(y + 3) + 2 combining like terms 5y + 2 + 6 + 2y Commutative Property € cared
Answers
Answer:
Distributive Property = 5y+2(y+3)+2
combining like terms = 5y+2+6+2y
Commutative Property = 6y-y+2y+10-4+2
Step-by-step explanation:
The correct matching of the properties will be:
Distributive Property = 5y+2(y+3)+2
combining like terms = 5y+2+6+2y
Commutative Property = 6y-y+2y+10-4+2
Original expression: 5y + 2(y + 3) + 2
How to match the valueApply the distributive property by multiplying 2 to the terms inside the parentheses:
5y + 2y + 6 + 2
Combine like terms:
(5y + 2y) + (6 + 2)
7y + 8
Rearrange the terms using the commutative property:
(7y + 2y) + (6 + 2)
9y + 8 + 8
Simplifying further, we have:
9y + 16
Therefore, the simplified expression is 9y + 16.
Learn more about distributive property
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your parent gave you a gift cart for your favorite coffee shop. the card was worth $50 when you got it . each day, buy a drink for $3 . which equation shows the value on the gift card over time ?
Answers
Answer:
x-3
Step-by-step explanation:
x representing the amount of money on the gift card
y = -3x + 3
-3x - y = -6
Answers
Answer:
let it be equation 1 and 2
Step-by-step explanation:
-3x -(-3x+3) =-6
-3x +3x -3= -6
0x = -3
x = 0
y = -3(0) +3
y = 3
find the angle with straight line y is equals to root 3 x minus 4 makes angle with y axis
Answers
Answer: Therefore the angle made by the line with y-axis is 30 degrees.
Step-by-step explanation:
''.''
42 3/19 times 513 3/6
Answers
Answer:
21648
3
38
Step-by-step explanation:
(42
3
19
)(513
3
6
)
=
801
19
(513
3
6
)
=
801
19
(513
1
2
)
=
801
19
(10272)
=
822627
38
=21648
3
38
Identify the constant of Proportionality Write an equation to relate weight, w, to the price, p.
Answers
Answer:
m = .45
p = .45w
______
.45 = 9/20
Explanation:
m is the rate of change equal to the price over the weight or p/w.
Because this relationship is proportional, each weight divided by its corresponding price must equal the same fraction because it is constant.
We can prove this by dividing each price by its weight to find this proportion.
1.35/3 = 2.7/6 = 27/60 = 9/20 = 0.45
1.71/3.8 = 171/380 = 9/20 = 0.45
2.34/5.2 = 234/520 = 117/260 = 9/20 = 0.45.
Since equal the same value, this means that 9/20 or .45 is our proportion.
in terms of p = mw
p/w = 9/20.
p = mw → p/w = m → m = p/w = .45 .
Thus, p = .45w,
so m = .45.
Which means that for every .45 or 9/20 w or weight, there is a price of $1.
Determine the slope and the Y-intercept of each linear equation. y = 6x
Answers
Answer:
Slope = 6
Y intercept = 0
Step-by-step explanation:
Given equation is: y = 6x
Equating it with y = mx + b
We find:
Slope m = 6
Y intercept b = 0
Step 3: Apply Quantitative Tools
Use computational and algebraic tools to quantify the total costs (gas, maintenance/repairs, purchase price) for each scenario over the three years.
Round your answers to the nearest dollar.
Scenario
Total Cost for Three Years
Keep the old car
$
Number
Buy the fuel-efficient used car
$
Number
Step 4: Make an Informed Decision
Based on the information presented what do think Manny should decide?
Option #1: Keep the old car
Option #2: Buy the fuel-efficient used car
Option #
Number
Answers
Answer: Total old car is $2955.89, new car $1080.94 *for 3yrs
Step-by-step explanation:
Old= [(100/19)($2.36)(52)+$770]*3 = $2955.89
New=[(100/34)($2.36)(52)+20(12)]*3= $1080.94
I keep the old car # 1
If the 8 men on a construction crew make up 40% of the entire crew, how many people are in
the crew?
Answers
Answer:
20
Step-by-step explanation:
Since 40% of the crew are men, which means n.40=8 n=8/.40 n=20 total number of crew 20 - 8=12 are women.
The number of people in the crew is 20.
Let the number of people in the crew be represented by x.
Therefore, 40% of x will be 8. This can then be written as:
40% of x = 8
40/100 × x = 8
0.4 × x = 8
0.4x = 8
Divide both side by 0.4
0.4x/0.4 = 8/0.4
x = 20
Therefore, the number of people in the crew is 20.
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If AX:XB as AB:AC, find missing length
AX = 5, CB = 4, AC =6, find AB
Answers
Answer:
AB = 15 ÷ 2
Step-by-step explanation:
The computation of the AB is shown below;
Given that
AX : XB as AB : AC
AX = 5
XB = 4
AC = 6
AB = x
Based on the above information
We can write as
5 : 4 as to x : 6
ratios can be written as fractions
5 ÷ 4 = x ÷ 6
(4)(x) = (5)(6)
4x = 30
x = 30 ÷ 4
x = 15 ÷ 2
Hence, the AB = 15 ÷ 2
Factorise (3m -2n)^2 +5p(3m - 2n)
Answers
Answer: if you factor it you will get this-->(3m−2n)(3m−2n+5p)
Step-by-step explanation:
Write the slope intercept form of the equation of the line through the given points
Answers
Answer:
9) y = -3x - 4
10) y = -1/3x + 14/3
11) y = x - 1
12) y = -7/5x - 18/5
13) y = 3/5x + 9/5
14) y = -2x - 3
Step-by-step explanation:
For this explanation, let's use the last problem as the example. You would use the formula y=mx+b. The first thing you would need to find would be the slope, or m. So, you would find the slope and conclude the answer is -2. After that, you would solve for b and get the answer. Hope this helped!
A party rental company has chairs and tables for rent. The total cost to rent 4 chairs and 8 tables is 89 . The total cost to rent 2 chairs and 3 tables is 34 . What is the cost to rent each chair and each table?
Answers
Answer:
Let C = cost to rent each chairLet T = cost to rent each table 4C + 8T = 732C + 3T = 28 Multiply the 2nd equation by (-2) and then add the equations together 4C + 8T = 73-4C - 6T = -56 2T = 17T = 17/2 = 8.5 Plug this in to the 1st equation to solve for C 4C + 8(17/2) = 734C + 68 = 734C = 5C = 5/4 = 1.25 So the cost to rent each chair is $1.25 and the cost to rent each table is $8.50
Step-by-step explanation:
will give brailest Solve the following equation to find the value of r?
r/8.5=16
Answers
Answer:
R=296
Step-by-step explanation:
Multiplication is the opposite of division so you want to multiply both your given numbers.
Hope this helped
what is 12+6x>99 help plz asaaap
Answers
Answer:
[tex] \frac{29}{2} [/tex]
How can I solve .6 x .5
Answers
Answer:
The process of repeating additions of the same number.
Step-by-step explanation:
multiply using distributive property ... i think
Which math expression means "the difference of 40 and 12"?
Answers
Answer:C
Step-by-step explanation:This is because c has subtract sign and you are trying to find the difference and difference you need to subtract.And you need to find the difference of 40 and 12 so u write 40- 12 which is choice c.
Hope it helps and it does please give Brainliest .Thanks ;)
Choose all equations for which x=2 is a solution.
A:x+3=5
B:x+2=8
C:x+1=1
D:x-2=4
Ex-7=5-
Answers
What is the autput the following machine when the intut is 4
INPUT--------》Subtract7----------》Divide by 3----------》OUTPUT
Answers
Input is 4.
Process machine:
Input > - 7 > ÷ 3 > Output
Solve:
(Input) 4 - 7 = -3
-3 ÷ 3 = -1 (Output)
Input = 4
Output = -1
Answer:
-1 (negative 1)
Step-by-step explanation:
The input, which is 4 minus 7 is -3. -3 divided by 3 is -1.
Which means the output will be -1 if the input is 4.
Hope it helps
Have a great day
its just a riddle tho i need it for math plz answer the riddle ill give brainliest
Answers
Answer:
Area Rugs
Step-by-step explanation:
Consider the following problem: There are 722 identical plastic chips numbered 1 through 722 in a box. What is the probability of reaching into the box and randomly drawing the chip numbered 552
Answers
Answer:
Probability of reaching Chip number 552 = 1 / 722
Step-by-step explanation:
Given:
Total number of chips = 722
Chip number selected = 552
Computation:
Probability of reaching Chip number 552 = Number of chip selected / Total number of chips
Probability of reaching Chip number 552 = 1 / 722
Use the zero product property to find the solutions to the equation x2 + x – 30 = 12.
x = –7 or x = 6
x = –7 or x = –6
x = –6 or x = 7
x = 6 or x = 7
Answers
Answer:
answer is in the img below
Step-by-step explanation:
brainliest plzzz
Answer:
A) x= -7 or x = 6
Step-by-step explanation:
e2021
PLEASE ANSWER
At Shoe Carnival a pair of shoes costs $83.05. How much do the shoes
cost after a 15% discount? *
Answers
Answer:
$70.59
Step-by-step explanation:
15% of $83.05 = 12.4575$83.05 - $12.4575 = $70.59I hope this helps!
explanation:
15% = .15
1 - .15 = .85
83.05 * .85 = 70.59
Simplify the following expression and explain your answer. 3x-y+2y+4xy
show your work plss
Answers
Answer:
Step-by-step explanation:
Here you go mate
PEMDAS: Parentheses, Exponents, Multiplication and Division, Addition and Subtraction
Step 1
3x-y+2y+4xy equation/Question
step 2
3x-y+2y+4xy simplify by removing brackets and combining terms
(4xy)+(3x)+(-y+2y)
4xy+3x+y
answer
4xy+3x+y
Answer:
(2x+2y)(2y)+3x-y
Step-by-step explanation:
. . 3x-y+2y+4xy
3x+y+4xy
x²+2xy+y²-x²+2xy-y²+3x-y
(x+y)²-(x²-2xy+y²)+3x-y
(x+y)²-(x-y)²+3x-y
=(x+y+x+y)(x+y-x+y)+3x-y
(2x+2y)(2y)+3x-y
16 is a factor of 24.
O A. True
O B. False
Answers
(f-g)(x) =
x2 + x-4
x²+x+4
x2-x+6
x2 + x + 6
Answers
Answer:
(f – g)(x) =
x2 + x – 4
Step-by-step explanation:
The answer is A on edge, hope this helps!
Is (9w x 0) -12 and 9w -12 equivalent
Answers
Answer:
no its not
Step-by-step explanation:
You would have to multiply 9w times -12 and 0 times -12 which does not equal the equation
The sum of seven and the quotient of a number x and 8
Answers
Answer:
The answer is 0.875.
Step-by-step explanation:
7 / 8 = 0.875.
0.875 x 8 = 7. (To check answer)