Step-by-step explanation:
142r4h+34-45=673cm2468228b288assignment means participants have an equal chance of being in the control group or in the experimental group. blind double-blind random nonbiased
Random assignment means participants have an equal chance of being in the control group or in the experimental group.
Assignment refers to putting people into experimental or control group. In this, the Random assignment involves dividing the participants into two groups through randomization. That is, selection is on random. Tis method provides equal chance for the participants to be in the experimental or control group.
This kind of assignment will be unbiased and the participants in two groups does not differ in any way. So random assignment makes the experiment and control group equivalent. Also this makes the experimental study more accurate, acceptable and scientific too.
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Here are the first four terms of a quadratic sequence
3 10 21 36
Work out an expression for the nth term
Please please answers this question ill give u like and mark as brainlist
Answer:
2n² + n
Step-by-step explanation:
Given sequence:
3, 10, 21, 36, ...
Work out the first differences between terms:
[tex]3 \underset{+7}{\longrightarrow} 10 \underset{+11}{\longrightarrow} 21 \underset{+15}{\longrightarrow} 36[/tex]
As the first differences are not the same, work out the second differences.
[tex]7 \underset{+4}{\longrightarrow} 11 \underset{+4}{\longrightarrow} 15[/tex]
As the second differences are the same, the sequence is quadratic and will contain an n² term.
The coefficient of n² is always half of the second difference. Therefore, as the second difference is 4, the coefficient of n² is 2.
To work out the nth term of the sequence, write out the numbers in the sequence 2n² and compare with the given sequence:
[tex]\begin{array}{|l|c|c|c|c|}\cline{1-5} n & 1 & 2 & 3 & 4 \\\cline{1-5} 2n^2 & 2 & 8 & 18 & 32\\\cline{1-5} \sf Operation & +1 & +2& +3& +4\\\cline{1-5} \sf Sequence & 3 & 10 & 21 & 36\\\cline{1-5}\end{array}[/tex]
Therefore, we need to add n to 2n² to match the sequence.
Therefore, the nth term of this sequence is 2n² + n.
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in a bowl containing 10 marbles, 5 are blue and 5 are pink. if 2 marbles are picked randomly, what is the probability that the 2 marbles will not both be pink?
Answer:from least to greatest:
1) g (x)
2) f (x)
3) h (x)
Step-by-step explanation:
Answer:
For f (x):
f (x) = (x + 3) ^ 2 - 2
For x = -1
f (-1) = (-1 + 3) ^ 2 - 2
f (-1) = (2) ^ 2 - 2
f (-1) = 4 - 2
f (-1) = 2
For x = 3
f (3) = (3 + 3) ^ 2 - 2
f (3) = (6) ^ 2 - 2
f (3) = 36 - 2
f (3) = 34
AVR = ((34) - (2)) / ((3) - (- 1))
AVR = 8
For g (x):
linear graph with and intercept of negative 3 over 2 and x intercept of 3
y = mx + b
b = -3/2
For me we have:
0 = m (3) - 3/2
3m = 3/2
m = 1/2
The function g (x) is:
g (x) = (1/2) x - 3/2
For x = -1
g (-1) = (1/2) (- 1) - 3/2
g (-1) = -1/2 - 3/2
g (-1) = -4/2
g (-1) = -2
For x = 3
g (3) = (1/2) (3) - 3/2
g (3) = 3/2 - 3/2
g (3) = 0
AVR = ((0) - (- 2)) / ((3) - (- 1))
AVR = 1/2
For h (x):
Using the table we have:
AVR = ((62) - (14)) / ((3) - (- 1))
AVR = 12
Step-by-step explanation:
Please help me!!! In calculus
Answer::
:i
Step-by-step explanation:
.
In the diagram, what is the ratio of patterned circles to plain circles?
Four arrays of circles are represented. First array has a plain circle. Second array has 4 patterned circles and 1 plain circle. Third array has 1 patterned circle and 4 plain circles. Fourth array has a plain circle.
The ratio of the patterned circles to plain circles is 6 : 7.
We are given the four arrays of the circles.
In the first array, we have only 1 plain circle.
In the second array, we have 4 patterned circles and 1 plain circle.
In the third array, we have 1 patterned circle and 4 plain circles.
In the fourth array, we have only 1 plain circle.
So, total patterned circles = 5 + 1
Total patterned circles = 6
Total plain circles = 1 + 1 + 4 + 1
Total plain circles = 7
Ratio of patterned circles to plain circles will be given as:
6 : 7
Therefore, we get that, ratio of the patterned circles to plain circles is 6 : 7.
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What is x if f(x) = -2
in that function x would be -2
The sum of the squares of two consecutive integers is 25 find the integers
Determine the values of x in the equation x2 = 64.
x = ±32
x = 32
x = ±8
x = −8
Answer:
32 or +-8 depending on question
Step-by-step explanation:
If question is 2x = 64, then x= 32
If question is x^2 = 64, then x= +-8
m∠K=(6x+12)°. Find the measure of the complement of ∠K.
A. (102 + 6x)°
B. (112 + 6x)°
C. (67 − 6x)°
D. (78 − 6x)°
The measure of the complement of angle K is (78 - 6x)°. The correct option is D. (78 − 6x)°
Complement of an AngleFrom the question, we are to determine the complement of the given angle measure
From the given information, the measure of angle K (m ∠K) is (6x + 12)°
NOTE: If two angles are complementary, the measures of the angles sum up to 90°
Let the complement of angle K be angle L.
Thus,
∠K + ∠L = 90°
(6x + 12)° + ∠L = 90°
6x° + 12° + ∠L = 90°
∠L = 90° - 12° - 6x°
∠L = 78° - 6x°
∠L = (78 - 6x)°
Hence, the measure of the complement of angle K is (78 - 6x)°. The correct option is D. (78 − 6x)°
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find the area of the polygon with the given points A (-5,-2) B (4,-2) C (4, -7) D (-5, -7)
A librarian's salary was $25000 in 2000 and $30500 in 2006. the librarians alary follow a linear growth pattern. What will the salary be in 2025
y=47,916.666 dollar after 25 years
librarian salary =25000 dollar in 2000
librarian salary=30500 dollar in 2006
in 6 years increment is 30500 - 25000= 5500dollar
in one year increment is 5500/6= 916.666
m= 916.666 each year
b= 25000
y=mx+b
y=916.666*25+25000 given x=25
y=47,916.666 dollar after 25 years
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how do i solve -8 - -4 as an integer problem??
will give 30 points + brain
Answer:
-8 - (-4) = - 8 + 4
Because negative times a negative is positive
HELP I LITTERALLY DO NOT UNDERSTAND
Answer: what are the options tho?
Step-by-step explanation:
anna bought 8 tetras and 2 rainbow fish for her aquarium. the rainbow fish cost $6 more than the tetras. she paid a total of $37.
Answer-
The cost of one tetra is $2.5 and one rainbow fish is $8.5
Explanation
Let the cost one tetra be 'x';
Cost of rainbow fish = x + 6;
According to question;
8x + 2(x + 6) = 37;
10x = 25
x = $2.5;
the amount or equivalent paid or charged for something : price
The average cost of a university training has gone up dramatically.
the outlay or expenditure (as of attempt or sacrifice) made to acquire an item
He executed repute, but at the fee of dropping numerous buddies.
loss or penalty incurred specially in gaining some thing
the price of lives during war
three
costs plural : charges incurred in a judicial process
particularly : those given by the law or the courtroom to the triumphing party in opposition to the dropping birthday party
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7. Which statements about the values of 7.055
and 70.55 are true? Select all that apply.
7.055 is 10 of 70.55.
7.055 is 100 of 70.55.
70.55 is 10 times 7.055.
70.55 is 100 times 7.055.
7.055 is 10 times 70.55.
The statement which is true to the values of 7.055 and 70.55 are true is:
70.55 is 10 times 7.055. is true.
Given, the values are 7.055 and 70.55
statement A.
7.055 is 10 of 70.55
= 70.55×1/10
= 705.5
⇒ 705.5 ≠ 7.055
Statement B.
7.055 is 100 of 70.55.
= 70.55×1/100
= 0.7055
⇒ 0.7055 ≠ 7.055
Statement C.
70.55 is 10 times 7.055.
= 10 × 7.055
= 70.55
⇒ 70.55 = 70.55
hence true.
Statement D.
70.55 is 100 times 7.055.
= 100 × 7.055
= 705.5
⇒ 705.5 ≠ 70.55
Statement E.
7.055 is 10 times 70.55.
= 10 × 70.55.
= 705.5
⇒ 705.5 ≠ 70.55
hence the correct option is 70.55 is 10 times 7.055.
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In a food court there are people eating hamburgers, burritos & pizza. P(h) = 0. 38 and P(b) = 0. 31. If there are 35 people eating pizza, what is the total number of people in the food court?
Answer should be rounded to the nearest WHOLE NUMBER
The total number of people in the food court eating pizza, burritos, and hamburgers is 113 (Approximate) or (Whole number)
People eating hamburger P(h) =0.38
People eating burritos P(b) = 0.31
Number of people eating pizza = 35
Let's suppose the total number of people is 1
So,
By adding the total number of people eating hamburgers and burritos
= 0.38+0.31
= 0.69
The ratio of the total number of people eating pizza = 1.00 - 0.69
= 0.31
So total number of people eating pizza = 0.31 = 35
By solving :
1 = 35 / 0.31
= (35*100)/31
= 3500/31
= 112.9 (we have to write it down in the nearest whole number)
Here we writing the approximate value of 112.9 = 113 (Approximate)
Hence, the total number of people in the food court in the nearest whole number is 113
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Graph the line y=−15x on the coordinate plane.
Answer:
The graph is provided in the image
25 points plus brainliest
Answer:
x = -7
Let the first integer be x.
Given the next two integers are consecutive, it would be: x+1, x+2
The problem states: "4 more than the smaller number plus twice the 3rd number is 7 less than the 2nd number."
Translating English to Algebra, you'll get:
(x + 4) + 2(x + 2) + 7 = x + 1
x + 4 + 2x + 4 + 7 = x + 1
3x + 15 = x + 1
2x = -14
x = -7
That would be the third option.
Use the diagram shown to answer the question. What
are the sine and cosine values of a 60° angle?
Answer: sin(60°)= [tex]\frac{\sqrt{3}} 2[/tex] and cos(60°)=[tex]\frac{1} 2[/tex]
Step-by-step explanation:
sine means opposite/hypothenus (SOH)
opposite=[tex]\frac{\sqrt{3}} 2[/tex] and hypothenus is 1
sin(60°) = [tex]\frac{\sqrt{3}} 2[/tex] ÷ [tex]\frac{1} 1[/tex]
= [tex]\frac{\sqrt{3}} 2[/tex] × [tex]\frac{1} 1[/tex]
= [tex]\frac{\sqrt{3}} 2[/tex]
cosine means adjacent/hypothenus (CAH)
adjacent= [tex]\frac{1} 2[/tex] and hypothenus is 1
cos(60°) = [tex]\frac{1} 2\\[/tex] ÷ [tex]\frac{1} 1[/tex]
= [tex]\frac{1} 2[/tex] × [tex]\frac{1} 1[/tex]
= [tex]\frac{1} 2[/tex]
Pls help me quickly!
Answer:
Step-by-step explanation:
answer number 3
is the answer
mav is older than justin. Their ages are consecutive integers find mavs age if the product of their age is 42
Answer:
7
Step-by-step explanation:
hope this works :)
consecutive numbers means 2 numbers next to eachother like 8 and 9 or 3 and 4
product means basically the result of numbers multiplying together, e.g. the product of 8×9 = 72
so if you use trial and error you will find 6 × 7 = 42 and since mav is older she must be 7 years old
Answer:
mav is 7
Step-by-step explanation:
let justin's age be n then mav is n + 1 and the product is
n(n + 1) = 42
n² + n = 42 ( subtract 42 from both sides )
n² + n - 42 = 0 ← in standard form
(n + 7)(n - 6) = 0 ← in factored form
equate both factors to zero and solve for n
n + 7 = 0 ⇒ n = - 7
n - 6 = 0 ⇒ n = 6
since n > 0 then n = 6
mav is n + 1 = 6 + 1 = 7
How much weeks would I need to save up to get to $1000 if I get 35 one week, then 45 the next week (Every week for chores I get 35 and 45 every other week)
Example: week 1: +35
Week 2: + 45
Week 3: +35
Week 4: + 45
Answer:
12.857 aa 35 +12.222 as 25
Answer:
26 weeks (6 months)
Step-by-step explanation:
$35x + $45y = $1000
I don't know how to show the work but it would take 26 weeks to reach $1,040. That's exactly 6 months, so half a year.
HELP HELO
HELPPPPPP ASAP
On average, Leah's car gets 31.4 miles on every gallon of gasoline. If she fills up her tank for $2.18 per gallon, how much will it cost her to drive
358 miles?
Answer:
Step-by-step explanation:
Car drive 31.4 miles/gallon
for 358 miles, Leah needs 358/31.4 =~ 11.40 gallons
since it cost $2.18 / gallon, it will cost Leah 2.18 * 11.4 = $24.85
set up the equation relating the new ratio of broth to solution to the new percentage of broth to solution. 25/60
The new percentage of broth to solution 25/60 is 41.67
Broth, also known as bouillon is a savory liquid made of water in which meat, fish or vegetables have been simmered for a short period of time .It can be eaten alone, but it is most commonly used to prepare other dishes, such as soups.
Commercially prepared liquid broths are available, typically chicken, beef, fish, and vegetable varieties. Dehydrated broth in the form of bouillon cubes were commercialized beginning in the early 20th century.
Broths have been used as a nutrition source for the sick in Great Britain since at least the early 1700s, such as for dysentery patients
Let,
60 represents the 100% of the broth to solution
25 represents the x percentage of the broth to solution
Now,
Solving for the 25 which represents the x percentage of the broth to solution.
25/100 = x/100*
25/60 = x/100*x
25(100) = 60x
x = 2500/60
x = 41.67
Therefore,
25 represents the 41.67 percentage of the broth to solution.
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Answer:
a) 25/60=x/100
Step-by-step explanation:
write equation in the standard form then identify the terms and the values of a,b and c
After watching baking shows on T.V., Latrell signs up for a cake-decorating class. To practice
his new skills, he decorates a batch of cupcakes with sugar flowers. Latrell puts 4 sugar
flowers on each cupcake. In all, Latrell puts 32 sugar flowers on the cupcakes.
Which equation can you use to find the number of cupcakes c Latrell decorates?
Please help with problem 19
Algebra 1
The expression for r is n(4t-v) and the expression for the width is (P-2l)/2
Subject of formulaThis is a way of representing a variable with another variable.
Given the expression below:
r/n + t = 4v
Making r the subject
r/n = 4v - t
r =. n(4t-v)
Hence the expression for r is n(4t-v)
For the expression
P = 2l + 2w
P - 2l = 2w
2w = P - 2l
w = (P-2l)/2
Hence the expression for the width is (P-2l)/2
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the following are like terms and can be combined together through addition: 5x and 3y question 2 options: true false brainly
It is false that 5x and 3y are like terms. They can not be combined together through addition.
Like terms are those who encompass the same variables raised to the identical power. The most effective difference is within the numerical coefficients. only we are able to integrate like terms in an expression. To make algebraic formulation simpler to work with, we integrate like phrases to shorten and simplify them.to combine like phrases, upload the coefficients while retaining the variables consistent.We integrate like terms to form one term.in contrast to terms are algebraic words that don't have the equal coefficients and can't be raised to the identical strength.An algebraic expression with unlike phrases is 5x + 3y as it consists of wonderful variables, x and y, and they're not raised to the same power.To learn more about like terms, visit :
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How to convert 7/18 into a decimal number using long division
The conversion of 7/18 into a decimal number using long division would be 7/18 = 0.39
In this question, we have been given a fraction.
We need to convert given fraction into a decimal number using long division.
Given fraction: 7/ 18
Consider the long division of 18 ÷ 7
0.388
_________
18 ) 7
- 0
__________
70
- 54
__________
160
- 144
__________
160
- 144
___________
16...
This means, the 7/18 = 0.3888...
If we round the number 0.3888... to two decimal places then it would be, 0.39
Therefore, the conversion of 7/18 into a decimal number using long division would be 7/18 = 0.39
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The answersssssssssss
Answer:
pic 1 goes first second pic second slot
Step-by-step explanation: