The sampling shows that the conclusion by the teacher is done as D. The teacher conducted an observational study by comparing the performance on the test.
What is sampling?Sampling simply means a process on statistical analysis that's used to take observations about a population.
In this case, the teacher conducted an observational study by comparing the performance on the test of those who completed their review worksheets to those who did not complete their review worksheets.
Learn more about sampling on:
https://brainly.com/question/17831271
Fill in the blank. Thomas buys a washer for $350 and a dryer for $300. The sales tax is 7.5%. How much will he pay for the washer and dryer, including sales tax?
Answer:
$698.75
Step-by-step explanation:
Washer - 350$
Dryer - 300$
Total of these two items = 650$
1% of 650$ = 6.5$
$6.5 x 7.5% = 48.75
Tax - 48.75$
350 + 300 + 48.75 = 698.75
which expression is equivalent to the trigonometric expression
Answer:
A: [tex]csc(\theta)[/tex]
Step-by-step explanation:
Let's rewrite the expression in terms of sine and cosine, then simplify what can be simplified.:
[tex]sin(\theta) \cdot \frac{cos^2(\theta)}{sin^2(\theta)}\cdot \frac 1{cos^2(\theta)} =\\\frac1{sin(\theta)} = csc(\theta)[/tex]
HELP LOOK AT THE PIC ( Write the number of the vertices) I FORGOT THIS SINCE YEARS AGO
Answer:
3 vertices
Step-by-step explanation:
Vertices are the "points" of a 2D figure. In this case, we see the 2D figure as a triangle. There are 3 points on the triangle, so there are 3 vertices.
Help Me Please Auto Brainliest whoever get the correct answer
Step-by-step explanation:
1) A corresponds to F (your screen shot is cut off, that option is not shown)
2) E) B corresponds to D
3) F) C corresponds to E
4) H) angle A corresponds to angle F
5) B) angle B corresponds to angle D
6) A) angle C corresponds to angle E
7) C) side AB corresponds to side FD
8) D) side BC corresponds to side DE
9) G) side AC corresponds to side FE
10) A.
of course they are similar. being congruent means that if you turn them to have the same orientation and then move them on top of each other, they cover each other up perfectly. so, in essence, they are even equal.
of course, being equal makes them also similar ...
11. D.
12. A.
please solve the following, many thanks!!
Answer:
x = 10
Step-by-step explanation:
Since the pentagons are similar you can say...
4x cm/48 cm = x cm/(x+2) cm
Now do cross multiplication with this equation, so 4x is multiplied with (x+2) and 48 is multiplied with x... you end up with:
4x^2+8x = 48x, now subtraction 8x from 48 x....
4x^2 = 40x, and divide one x from each side
4x = 40, therefore x = 10
please answer the question in the link provided and show all the working
Help with this pls pls plsss?
Answer:
The carpet will cost $52.
Step-by-step explanation:
hope this helps!!!
The figure shown below is a right prism with triangular bases. The sides of its bases are each 6 centimeters and the approximate height of one of the bases is 5.2 centimeters. The length of the prism between the bases is 9 centimeters.
What is the approximate surface area of this right triangular prism?
A. 128.5 cm
B. 162 cm
C. 193.2 cm
D. 196 cm
The approximate surface area of this right triangular prism is 193.2cm
Surface area of prismThe surface area of a triangular prism is expressed as:
Surface area = (Perimeter of the base × Length of the prism) + (2 × Base Area)
Perimeter of the base = 6 + 6 + 6
Perimeter of the base = 18cm
Length of the prism = 9cm
Base area = 1/2 * 5.2 * 6
Base area = 15.6cm
Determine the surface area
Surface area = (18 * 9) + 2(15.6)
Surface area = 162 + 31.2
Surface area = 193.2 cm
Hence the approximate surface area of this right triangular prism is 193.2cm
learn more on rectangular prism here; https://brainly.com/question/477459
Four friends went to the coast on vacation
and wanted to split the trip's costs evenly
between them. The house rental cost $400.
The cleaning fee was $75 and they ordered
pizza the first night for $25. How much
should each friend contribute?
A. $500
B. $125
C. $100
D. $75
Answer:
$125
Step-by-step explanation:
pls mark brainly, tyy
Show proportion and how to solve please
Answer:
x = 8
Step-by-step explanation:
In this geometry, all of the triangles are similar right triangles. That means corresponding sides are proportional. The proportion you write will express that relation for the sides you are given.
long side / short side = x/4 = 4/(x-6)
Multiplying this proportion by 4(x-6) gives ...
x(x -6) = 16
We can add 9 to complete the square.
x^2 -6x +9 = 16 +9
(x -3)^2 = 25
x -3 = 5 . . . . . . . take the square root (only the positive root is of interest)
x = 8 . . . . . . . . . add 3
Pls:).......................
Answer: ECB and ABC
lmk if im wrong :)
Complete the description of what happens to a figure when the given sequence of transformations is applied to it: (x,y) → (-x,y); (x,y) → (0.6x, 0.6y);(x, y) = (x - 5, y + 5)
Reflection over the (y-axis/x-axis/origin); (movement upwards/translation/transformation/dilation) with a scale factor of 0.6; translation 5 unit left and ____ units up.
Answer:
Reflection over the y-axis; dilation with a scale factor of 0.6; translation 5 unit left and 5 units up.Step-by-step explanation:
The results of the given transformations are ...
(x,y) → (-x,y); reflection over the y-axis(x,y) → (0.6x, 0.6y); dilation by a factor of 0.6(x, y) → (x - 5, y + 5); translation left 5 and up 5_____
Additional comment
Changing the sign of the x-coordinate moves a point horizontally to the other side of the y-axis, reflecting it over the y-axis.
Multiplying coordinate values by the same factor effects a dilation about the origin by that factor.
Adding to the x-coordinate moves the point to the right; adding to the y-coordinate moves the point up. (Subtracting from x moves the point left.)
A machine fills 150 bottles of water every 8 minutes. How many minutes does it take this machine to fill 675 bottles?
7) What will be the new position of the given point (9,-4) after reflection across
the line x = 1?
a) (7,4)
b) (7,-4)
c) (-7,-4)
d) (-7,4)
Solve. 3,864 ÷ 322
A. 11
B. 12
C. 13
D. 14
Answer: B. 12
Step-by-step explanation:
Get a calculator, or solve using long division. Boom ez
if you have trouble with division then ask your teacher for help or search on internet
3864 / 322 = 12
please show work
5x+20=3x+4
7x-4=3x+8
2x+6=x-9
Answer:
To evaluate an expression, first calculate the
powers, then multiply and divide in order from
left to right, and finally add and subtract in order
from left to right. Parentheses have preference.
example: 14 − 3
2
= 14 − 9 = 5
example: 2• 4 + 3•5 = 8 +15 = 23
example: 10 − 2 • 3
2
=10 − 2 • 9 =10 −18 = −8
example: (10 − 2) • 3
2
= 8•9 = 72
Problems 1-7: Find the value:
1. 2
3
= 5. 0
4
=
2. −2
4
= 6. (−2) 4
=
3. 4 + 2•5 = 7. 1
5
=
4. 3
2
− 2 • 3+1=
Problems 8-13: Find the value if a = −3, b = 2 ,
c = 0, d = 1, and e = −3:
8. a −e = 11. e
d
+
b
a
−
2d
e
=
9. e
2
+ (d − ab)c = 12. b
e
=
10. a −(bc − d) + e = 13. d
c
=
Step-by-step explanation:
To evaluate an expression, first calculate the
powers, then multiply and divide in order from
left to right, and finally add and subtract in order
from left to right. Parentheses have preference.
example: 14 − 3
2
= 14 − 9 = 5
example: 2• 4 + 3•5 = 8 +15 = 23
example: 10 − 2 • 3
2
=10 − 2 • 9 =10 −18 = −8
example: (10 − 2) • 3
2
= 8•9 = 72
Problems 1-7: Find the value:
1. 2
3
= 5. 0
4
=
2. −2
4
= 6. (−2) 4
=
3. 4 + 2•5 = 7. 1
5
=
4. 3
2
− 2 • 3+1=
Problems 8-13: Find the value if a = −3, b = 2 ,
c = 0, d = 1, and e = −3:
8. a −e = 11. e
d
+
b
a
−
2d
e
=
9. e
2
+ (d − ab)c = 12. b
e
=
10. a −(bc − d) + e = 13. d
c
=
[MA]:
x = -8
x = 3
x = -15
The explanation:
5x + 20 = 3x + 4
5x = 20 - 20 = 3x + 4 - 20
subtract = subtract = 5x = 3x - 16
5x = 3x - 16
5x - 3x = 3x - 16 - 3x
7x - 4 = 3x + 8
7x - 4 + 4 = 3x + 8 + 4
7x = 3x + 12
7x = 3x + 12
7x - 3x = 3x + 12 - 3x
2x + 6 = x - 9
2x + 6-6 = x - 9-6
2x = x - 15
2x = x - 15
2x - x = x - 15 - x
x = - 15
The sum of the digits of a certain two-digit number is 12. When you reverse its digits youthe new number is twelve less than twice the original number. What is the number?
Answer:
54
Step-by-step explanation:
5 Loni purchased a sweater with a regular price of $45.00. The sweater was on
sale for 20% off, and the sales tax rate is 8.25%. How much did Loni pay for the
sweater?
A $2.97
B $9.00
C $36.00
D $38.97
Answer:
D is correct
Step-by-step explanation:
First we find 20% of the price and subtract it
[tex]45*0.20=9\\45-9=36[/tex]
Next we find how much tax would be
[tex]36*0.0825=2.97[/tex]
then we add the two amounts together to get the final price
[tex]36+2.97=38.97[/tex]
Question 15 of 20
In which situation would a writer most likely use informal language?
A. Writing an essay for a college entrance application
B. Writing a letter to a supervisor requesting a letter of
recommendation
C. Writing a letter of interest for a job application
D. Writing a letter to a friend who is stationed in the military overseas
a writer will use a for the informal language
how many feet are equal to 168 inches.
Complete the
proportion
3 is to 4 as 75 is to...
Answer: 100
Step-by-step explanation:
[tex]\frac{3}{4} = \frac{75}{x}[/tex]
3 x 25 = 75
4 x 25 = 100
PLS ANDWER I RELALY NEED HELP PLSLSLSPLSSPPSLSPL
Answer:
1st is -120-x
2nd is -x-12
It says,
|x| = x, for any x >= 0 and
|x| = -x, for any x < 0 Now, instead of x, we have the expression x+120 inside the absolute value brackets:
|x+120|
Play the same game as above - what is the absolute value here?
|x+120| = x+120 for (x+120)>=0 and|x+120| = -(x+120) for (x+120)<0
Step-by-step explanation:
hope this helps. And please give me brainliest
Anita receives a pay increase of 4%. She was earning £7.50 per hour, now how much is she earning?
Answer:
£7.80 per hour
Step-by-step explanation:
Increase of 4%
= 7.50 x 1.04
= £7.80 per hour
Answer:
£7.8
Step-by-step explanation:
Amt she earned per hour = £7.50
Amt of increase = 4%
Amt she is earning currently =
£7.50*1.04 = £7.8
Help me plsss I’m not smart
Answer:
It tastes the same!
Step-by-step explanation:
Hope you have a wonderful day!!
If it helped mark me as brainliest!
Mr. Kelly knows that one side of his house is 20 feet long and it takes him six strides to walk the same distance. How long
is the other side of his house if it takes him 8.5 strides to walk it?
Mr. Kelly knows that one side of his house is 20 feet long and it takes him six strides to walk the same distance. How long
is the other side of his house if it takes him 8.5 strides to walk it?
Answer↷28.33 ft
Solution ↷Distance that can be covered in 6 strides = 20 ftDistance that can be covered in 1 stride = 20/6ft = 3.33 ftDistance that can be covered in 8.5 strides = 3.33ft x 8.5 =28.33 ftHence , Mr Kelly's house other side measures 28.33 ftLet that be x
Ratio remains same
[tex]\\ \rm\rightarrowtail \dfrac{6}{20}=\dfrac{8.5}{x}[/tex]
[tex]\\ \rm\rightarrowtail 6x=20(8.5)[/tex]
[tex]\\ \rm\rightarrowtail 6x=170[/tex]
[tex]\\ \rm\rightarrowtail x=170/6[/tex]
[tex]\\ \rm\rightarrowtail x=28.3ft[/tex]
the diagram shows the dimensions of the pool cover for a hotel pool. find the area of the pool cover
Answer:
b, the area is 978 square inches.
Step-by-step explanation:
Just do it step by step, and one polygon at a time.
Please help asap I put a photo
For each relation, decide whether or not it is a function.
Answer:
1: Function
2: Function
3: Not a function
4: Function
Step-by-step explanation:
1: Not a function
2: Function
3: Not a function
4: Function
REMINDER: If a x value has two diffreent y values, it is NOT a function!!!!
Have an amazing day!!
PLEASE RATE AND MARK BRAINLIEST!!!!
Which is an irrational number?
Answer:
An irrational number is a real number that cannot be expressed as a ratio of integers, for example, √ 2 is an irrational number. Again, the decimal expansion of an irrational number is neither terminating nor recurring.
Step-by-step explanation:
An Irrational Number is a real number that cannot be written as a simple fraction: 1.5 is rational, but π is irrational.
√2, √3, √5, √11, √21, π(Pi) are all irrational.
Hope this helps please mark brainliest :)
There are two labeled weights of 4 grams and 12 grams. The three circles each have the same weight. what is the weight of each circle in grams? show your thinking
I think the right Answer 8/3
Answer:
8/3
Step-by-step explanation:
This hanger is in balance. there are 2 labeled weights of 4 grams and 12 grams the 3 circles have the same weight.
We have to determine,
What is the weight of each circle?
According to the question,
Let the weight of each circle be x.
This hanger is in balance. there are 2 labeled weights of 4 grams and 12 grams the 3 circles have the same weight.
The hanger is in the balanced state then the sum of all weight of the left-hand side is equal to the sum of all weight of the right-hand side.
Left hand side weight = x+ x + x+ 4 = 3x+4
Right hand side weight = 12
Then,
The hanger is in a balanced state, the weight of each circle is given by,
The weight of the left-hand side = the weight of the right-hand side
The value of x is 8/3.
Hence, The weight of each circle is 8/3.
simplify this expression 4x^2 y^3 × 2x^3 y^4
Answer:
8x⁵y⁷
Step-by-step explanation:
4x²y³ × 2x³y⁴ = 8x⁵y⁷