Answer:
59
Step-by-step explanation:
These angles make linear pair
so angle 4 +60+61=180
Angle 4 = 180-121 = 59
Students at a middle school are divided into 6th, 7th, and 8th grades. A random sample of 15 students from each grade is chosen.
Which sampling method best describes this scenario?
A) simple random sample
B) stratified random sample
C) systematic random sample
D) voluntary response sample
Answer:
B. Stratified random sample is the correct answer
The best sampling method that describes the scenario where students from each grade (6th, 7th, and 8th) are randomly chosen in a sample of 15 students from each grade is B) stratified random sample.
In a stratified random sample, the population is divided into distinct groups or strata based on certain characteristics, and then a random sample is taken from each stratum. In this case, the distinct groups are the different grade levels (6th, 7th, and 8th grades). By randomly selecting 15 students from each grade, we ensure representation from each grade level in the sample.
This method allows for a more accurate representation of each grade level within the sample and can provide valuable insights into the characteristics and experiences of students in each grade.
To know more about sampling method click here :
https://brainly.com/question/15604044
#SPJ2
first part to last question
Answer:
For question 4 you would have 1560000. For question 5 you would have 660000
Step-by-step explanation:
find the product and reduce to lowest terms 4/9 x 18
Answer:
8
Step-by-step explanation:
its cuuz it is
Answer:
x = 8
Step-by-step explanation:
Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :
4/9-(x/18)=0
Step by step solution :
STEP
1
:
x
Simplify ——
18
Equation at the end of step
1
:
4 x
— - —— = 0
9 18
STEP
2
:
4
Simplify —
9
Equation at the end of step
2
:
4 x
— - —— = 0
9 18
STEP
3
:
Calculating the Least Common Multiple :
3.1 Find the Least Common Multiple
The left denominator is : 9
The right denominator is : 18
Number of times each prime factor
appears in the factorization of:
Prime
Factor Left
Denominator Right
Denominator L.C.M = Max
{Left,Right}
3 2 2 2
2 0 1 1
Product of all
Prime Factors 9 18 18
Least Common Multiple:
18
Calculating Multipliers :
3.2 Calculate multipliers for the two fractions
Denote the Least Common Multiple by L.C.M
Denote the Left Multiplier by Left_M
Denote the Right Multiplier by Right_M
Denote the Left Deniminator by L_Deno
Denote the Right Multiplier by R_Deno
Left_M = L.C.M / L_Deno = 2
Right_M = L.C.M / R_Deno = 1
Making Equivalent Fractions :
3.3 Rewrite the two fractions into equivalent fractions
Two fractions are called equivalent if they have the same numeric value.
For example : 1/2 and 2/4 are equivalent, y/(y+1)2 and (y2+y)/(y+1)3 are equivalent as well.
To calculate equivalent fraction , multiply the Numerator of each fraction, by its respective Multiplier.
L. Mult. • L. Num. 4 • 2
—————————————————— = —————
L.C.M 18
R. Mult. • R. Num. x
—————————————————— = ——
L.C.M 18
Adding fractions that have a common denominator :
3.4 Adding up the two equivalent fractions
Add the two equivalent fractions which now have a common denominator
Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:
4 • 2 - (x) 8 - x
——————————— = —————
18 18
Equation at the end of step
3
:
8 - x
————— = 0
18
STEP
4
:
When a fraction equals zero :
4.1 When a fraction equals zero ...
Where a fraction equals zero, its numerator, the part which is above the fraction line, must equal zero.
Now,to get rid of the denominator, Tiger multiplys both sides of the equation by the denominator.
Here's how:
8-x
——— • 18 = 0 • 18
18
Now, on the left hand side, the 18 cancels out the denominator, while, on the right hand side, zero times anything is still zero.
The equation now takes the shape :
8-x = 0
Solving a Single Variable Equation:
4.2 Solve : -x+8 = 0
Subtract 8 from both sides of the equation :
-x = -8
Multiply both sides of the equation by (-1) : x = 8
One solution was found :
x = 8
• A number is 10.678 more than 8.76. What is the number?
How to find coordinates of a point using ratio
m1=3, m2= 1
point A= (-5,4)
point B=(7,-2)
x=m1x2+m2x1/ m1+m2 , y=m1y2+m2y1 / m1+m2
x= 3×7 +1×-5/3+1 , y= 3×-2+1×4 / 3+1
x= 21-5/4, y= -6+4/4
x= 16/4, y= -2/4
x= 4, y= 0.5
Choose the correct simplification of the expression (a^2 multiplied by b^5)^3
A^6/b^15
A^5/b^8
A/b^15
A^6/b^11
Answer:
1
Step-by-step explanation:
the first one because if you take the expression that you want, and expanding it out, you will get the first one.
Answer:
A
Step-by-step explanation:
(a^2)^3 (b^5)^3
The powers multiply when written like this. They don't add.
a^6 b^15
A
HELP PLS MY CLASS IS ALMOST STARTING
Can someone help with this plz Its brining down my grade
- Sketch the solution to each system of inequalities.
Find and interpret the standard deviation of the set of data. 7. {6, 8, 2, 3, 2, 9}
Answer:
3.1
Step-by-step explanation:
Help!
Please type step by step!
Answer:
llllllllllllllllllllll
Step-by-step explanation:
hope this helps u....
what is 8,419 divided by 3
Answer:
2806.33333333
Step-by-step explanation:
Answer: 2806.3333333 (the 3 is repeating)
Step-by-step explanation:
What is i^34?
A. -1
B. -i
C. 1
D. 1
Answer:
A.-1 all you had to do was look up the answer
Step-by-step explanation:
Han has four shirts in his shirt drawer – a blue shirt, a grey shirt, a white shirt, and an orange shirt. He has three pairs of pants in his pants drawer – blue pants, khaki pants, and black pants. If Han chooses a shirt without looking and then chooses pants without looking, what is the probability that he will choose pants and a shirt that are the same color?
Answer:
1/12
Step-by-step explanation:
12 combinations are possible in this scenario. Shirts. Pants
blue 1 blue 2khaki 3black
grey 4 blue. 5khaki 6black
white 7 blue 8khaki 9black
orange 10blue 11khaki 12black
blue/blue are the only matching items so 1/12 chance
Answer:
1/12
Step-by-step explanation:
What is the mode of the following numbers?
3,7, 5, 2, 5, 5, 2,5
The mode is 5.ㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤ
Answer:
The mode is 5, hope this helps!
We can rewrite the expression 16+8 as 8 x (2+1). Notice that 8 is the greatest factor of 16 and 8. Use this same method to rewrite the expression 24+36 as the product of the greatest common factor of 24 and 36 and the sum of the remaining numbers. 24 + 36 = ____________
Answer:
60
Step-by-step explanation:
24+36=60
Answer:
60
Step-by-step explanation:
24+36=60
Find the complement of the angle 103º
(Let me know if it's impossible. NO LINKS!!)
Answer:
I don't think you can
Step-by-step explanation:
A. (-5,-)
B. (-2,-4)
C. (1.-6)
D. (-5.-5)
The diameter of a golf ball is approximately 2 inches. What is its volume?
Round your answer to the nearest whole number.
O A. 4in3
O B. 8 in3
O c. 33 in3
O D. 18 in3
Answer:
4in^3
Step-by-step explanation:
1) a) What are perpendicular lines and parallel lines
Answer:
the property of being perpendicular is the relationship between two lines which meet at a right angle.
parallel lines are lines in a plane which do not meet; that is, two straight lines in a plane that do not intersect at any point are said to be parallel.
MARKED AS BRAINLIEST:)
Answer:
49/5
Step-by-step explanation:
x+x+x+x+x+30=79
5x+30=79
5x=49
x=49/5
Please help! Tysm if you do!
Answer:
A
Step-by-step explanation:
We can solve this problem by eliminating wrong answers
It can be b because there is no 3
It can be c because the equation would be 4+3
And it can be d because the equation would be 3x+4
so it must be a
Answer:
option A is correct
as additional page costs is not fixed so there will be any value of x with multiply by 4
and the fixed remain only one time so it remains fixed and 3 is also fixed.
which of the numbers in the universe has no reciprocal?
Answer:
0 is the only number without a reciprocal
Determine the discriminant and then state how many solutions there are and the nature of the solutions. Do not solve. 6x^2-x-2=0
Given:
The quadratic equation is:
[tex]6x^2-x-2=0[/tex]
To find:
The nature of the solutions by using the discriminant.
Solution:
If a quadratic equation is [tex]ax^2+bx+c=0[/tex], then its discriminant is:
[tex]D=b^2-4ac[/tex]
If D<0, then both roots are complex.
If D=0, then both roots are real and equal.
If D>0, then both roots are real and distinct.
We have,
[tex]6x^2-x-2=0[/tex]
Here, [tex]a=6,b=-1,c=-2[/tex]. So, the value of the discriminant is:
[tex]D=(-1)^2-4(6)(-2)[/tex]
[tex]D=1+48[/tex]
[tex]D=49[/tex]
Since [tex]D>0[/tex], then both roots are real and distinct.
Hence, the discriminant of the given quadratic equation is 49 and both roots are real and distinct.
63 > -73
I need help plssss
Answer:
that statement is true
is this the answer you are looking for?
Answer:
True
Step-by-step explanation:
To find the roots of the quadratic equation 3x²- 2x+1=0 using the quadratic formula
Answer: This is what i got x=1+i √2/3 not sure if that is what you need but hope it helps
Step-by-step explanation:
Answer:
[tex]x = \frac{ 1 + 1\sqrt{-1}}{3}[/tex] and [tex]x = \frac{ 1 - 1\sqrt{-1}}{3}[/tex]
Step-by-step explanation:
Hello!
The quadratic formula is: [tex]x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}[/tex], derive from the standard form of a quadratic: [tex]ax^2 + bx + c[/tex].
The expression 3x² - 2x + 1 is a lot like our standard form:
a = 3b = -2c = 1Let's plug in the values and solve.
Solve the Quadratic Formula:
[tex]x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}[/tex][tex]x = \frac{-(-2) \pm \sqrt{(-2)^2 - 4(2)(1)}}{2(3)}[/tex][tex]x = \frac{2 \pm\sqrt{4 - 8}}{6}[/tex][tex]x = \frac{2 \pm \sqrt{-4}}{6}[/tex][tex]x = \frac{2 \pm 2\sqrt{-1}}{6}[/tex][tex]x = \frac{ 1 \pm 1\sqrt{-1}}{3}[/tex]The roots are [tex]x = \frac{ 1 + 1\sqrt{-1}}{3}[/tex] and [tex]x = \frac{ 1 - 1\sqrt{-1}}{3}[/tex]
Learn more about the derivation of the quadratic formula here:
https://brainly.com/question/11630991
PLZ PLZ HELP, 1 QUESTION, WILL GIVE BRAINIEST PLZ ANSWER QUICK! LOTS OF POINTS! DON'T ANSWER IF UR NOT SURE THANK YOU SO MUCH!
Answer:
I believe the answer is 52.
Step-by-step explanation:
I used the shape given to find the surface area because nets are not fun and my brain likes shapes better.
In how many ways can 10 horses be arranged in a merry-go-round?
Answer:
120 possible combinations
Step-by-step explanation:
sets:
{1,2,3} {1,2,4} {1,2,5} {1,2,6} {1,2,7} {1,2,8} {1,2,9} {1,2,10} {1,3,4} {1,3,5} {1,3,6} {1,3,7} {1,3,8} {1,3,9} {1,3,10} {1,4,5} {1,4,6} {1,4,7} {1,4,8} {1,4,9} {1,4,10} {1,5,6} {1,5,7} {1,5,8} {1,5,9} {1,5,10} {1,6,7} {1,6,8} {1,6,9} {1,6,10} {1,7,8} {1,7,9} {1,7,10} {1,8,9} {1,8,10} {1,9,10} {2,3,4} {2,3,5} {2,3,6} {2,3,7} {2,3,8} {2,3,9} {2,3,10} {2,4,5} {2,4,6} {2,4,7} {2,4,8} {2,4,9} {2,4,10} {2,5,6} {2,5,7} {2,5,8} {2,5,9} {2,5,10} {2,6,7} {2,6,8} {2,6,9} {2,6,10} {2,7,8} {2,7,9} {2,7,10} {2,8,9} {2,8,10} {2,9,10} {3,4,5} {3,4,6} {3,4,7} {3,4,8} {3,4,9} {3,4,10} {3,5,6} {3,5,7} {3,5,8} {3,5,9} {3,5,10} {3,6,7} {3,6,8} {3,6,9} {3,6,10} {3,7,8} {3,7,9} {3,7,10} {3,8,9} {3,8,10} {3,9,10} {4,5,6} {4,5,7} {4,5,8} {4,5,9} {4,5,10} {4,6,7} {4,6,8} {4,6,9} {4,6,10} {4,7,8} {4,7,9} {4,7,10} {4,8,9} {4,8,10} {4,9,10} {5,6,7} {5,6,8} {5,6,9} {5,6,10} {5,7,8} {5,7,9} {5,7,10} {5,8,9} {5,8,10} {5,9,10} {6,7,8} {6,7,9} {6,7,10} {6,8,9} {6,8,10} {6,9,10} {7,8,9} {7,8,10} {7,9,10} {8,9,10}
Figure A to figure B?
Is that right?
Answer:
d
Step-by-step explanation: cause thats the only answer that will maked sense
1. At Antonio's Pizza, a pepperoni pizza costs $6.95. Extra toppings are available for $0.50 each. If Greg bought a pizza for $8.45, how many extra toppings did he order?
he got 3 extra toppings
8.45-6.95=1.50
1.50/0.50=3
Write the number in 2 equivalent forms as a fraction, decimal, or percent.
5/8
What is the equivalent decimal?
Answer:
0.625 62.5%
Step-by-step explanation:
Answer:
Step-by-step explanation:
Dividing 5 by 8 on a calculator results in the "equivalent decimal:"
5/8 = 0.625
0.625 converts to 62.5%: a percent
5/8 is a proper fraction