Answer:
x + y = 8 + (-14) = 8 - 14 = -6
x/y = -20/4 = -5
x/y = 45/-9 = -5
Step-by-step explanation:
Replace the given values of x and y in the expressions
Solve for x
30
45
22.5
3x + x = 90° (because the sum is an acute angle)
4x = 90°
x= 22.5°
How would you implement cluster sampling for this study? A. Stand in a busy location on campus and randomly ask passersby to be part of the sample. B. Select a sample of 20% of students living in each dorm. C. Select a few dorms, and sample all of the students in those particular dorms. D. Select a sample of 35 students from each dorm
Using the concept of cluster sampling, it is found that the example which represents it is:
C. Select a few dorms, and sample all of the students in those particular dorms.
What is cluster sampling?It is when the population is divided into groups, and each element in the group is surveyed.In this problem, the example is given by option C, in which each dorm is a group, and all students in the dorm, that is, each element of the group, is surveyed.
To learn more about cluster sampling, you can take a look at https://brainly.com/question/16252312
HELP! The rule as a mapping for the translation of a rectangle is (x, y) → (x – 2, y 7). Which describes this translation?a translation of 2 units down and 7 units to the righta translation of 2 units down and 7 units to the lefta translation of 2 units to the right and 7 units upa translation of 2 units to the left and 7 units up
Answer:
Notation Rule A notation rule has the following form ry−axisA → B = ry−axis(x,y) → (−x,y) and tells you that the image A has been reflected across the y-axis and the x-coordinates have been multiplied by -1. Reflection A reflection is an example of a transformation that flips each point of a shape over the same line.
Step-by-step explanation:
Which number line can be used to find the distance between (4, -1) and (8, -1)?
Answer:
the last one
Step-by-step explanation:
I don't really know how to explain
Laptop screen sizes are determined by the length of the diagonal portion of the screen, rounded to the nearest whole number. A laptop screen has a 10 inch width and the height measures 8 inches. Calculate the screen size.
Group of answer choices
12.8 inches
9 inches
6 inches
14 inches
Answer:
6 inches
Step-by-step explanation:
6 inches
using hypotenuse law
size =10² -8² =6²
the wingspan of an airplane is 205feet. a model of this plane uses a scale of 5inches=45 feet. what is the wingspan of the model airplane?
Answer:
22.7
Step-by-step explanation:
divide 205 by 45 and then multiply by 5
The graph of a linear relationship has a slope of -5 and passes through the point (2,-12). Write the equation of the line in slope-intercept form
Answer:
To graph the line mark off the 2 points and draw a line through them.
Step-by-step explanation:
The slope = (-2-7) / (-3-0)
= -9/-3
= 3.
The value of b is found using the point-slope form of a line:
y - y1 = m(x - x1)
using m = 3, (x1, y1) = (0, 7):
y - 7 = 3(x - 0)
y = 3x + 7.
Step-by-step explanation:
y=-5x-2 is the equation of the line in slope-intercept form.
What is Slope of Line?The slope of the line is the ratio of the rise to the run, or rise divided by the run. It describes the steepness of line in the coordinate plane.
The slope intercept form of a line is y=mx+b, where m is slope and b is the y intercept.
The slope of line passing through two points (x₁, y₁) and (x₂, y₂) is
m=y₂-y₁/x₂-x₁
The slope of the line is -5.
We need to write the equation of the line in slope-intercept form which is passing through (2,-12)
We need to find y intercept
-12=-5(2)+b
-12=-10+b
-12+10=b
-2=b
The slope intercept form of line is y=-5x-2
Hence y=-5x-2 is the equation of the line in slope-intercept form.
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Nine less than product of 8 and a number is equal to 6
Answer:
n = 15/8 or 1.875
Step-by-step explanation:
Let's say that n represents the number:
8n - 9 = 6
8n = 15
n = 15/8
Answer:
x = 3/8
Step-by-step explanation:
nine (9) less than (minus) a product of (multiply) eight (8) and a number (represented by x) is equal to (=) six (6)
so our equation to solve is:
9 - 8x = 6
Rearange Terms
Subtract 9
-8x + 9 = 6
- 9 - 9
-8x = -3
x = 3/8
Derek has 4.8 pounds of potting soil. He puts equal amounts of soil in 8 pots. Derek draws this model to show how much soil is in each pot.
0.6
Step-by-step explanation:
since 4.8 goes into 8 pots equally the equation would be 4.8/8 = 0.6
7) You go out to eat at Buffalo Wild Wings with your friends. Your bill comes
to a subtotal of $27.88 You want to leave an 18% tip. What will be the TOTAL
COST of your meal including the tip?
Explanation:
18% of 27.88 = 0.18*27.88 = 5.0184 which rounds to 5.02
The tip is $5.02 which means the total bill is 27.88+5.02 = 32.90
A slight shortcut is to say 1.18*27.88 = 32.8984 which rounds to 32.90
The 1.18 represents an 18% increase
The product of a number and twenty more than that number.
Answer: 20+35=55+20=75
[tex]x^{2} x^{2} x^{2} x^{2} x^{2} x^{2} x^{2} x^{2} x^{2} x^{2}[/tex]
Step-by-step explanation:
Use the ruler to find 1/1/10 and 4/1/10
Answer:
50
Explanation
Based on the given conditions, formulate: 1\div \frac {1}{10} + 4\div \frac {1}{10}
Divide a fraction by multiplying its reciprocal:10 + 4 \times 10
Calculate the product or quotient:10 + 40
Calculate the sum or difference:50
Answer: 50
Step-by-step explanation:
Very easy question l just want to know if lm right
Yep the answer is -sqrt(7)
please help, and if you can explain! D:
Answer: 3, 2 1/3,9/4, 11/6/ 9/5/, 1 5/8 ,10/7
Step-by-step explanation: basically just highest to lowest number
Answer:
lowest: 1/3, 10/7, 9/5
Step-by-step explanation:
Cory, Amanda, and Bryan together need a total of 9 days to finish painting the house. Amanda and Bryan together need 12 days to finish painting. How many days will it take for Cory to paint the house alone?
Answer:
From what I can see I believe the answer will be 15 Days.
Step-by-step explanation:
I found this answer by---
9/3=3
9+3=12
12+3=15
____15____
Answer:
the answer is actually 36
Step-by-step explanation:
Keely makes meringues by mixing egg whites with sugar.
The ratio of egg whites to sugar by weight is 3:5
Keely has 8000g of sugar
She wants to use all this sugar to make meringues.
Keely has 9 boxes of eggs.
Each box contains 15 eggs
The weight of the egg white from one egg is 40g.
Has Keely got enough eggs to make meringues using
8000g of sugar?
(5)
Answer:
Yes, she will have enough eggs.
Step-by-step explanation:
It's an easy question if we carefully think about it.
Firstly we find the total number of eggs:
- 9 boxes x 15 eggs = 135 eggs
Secondly, the weight of the useful egg whites:
- 135 eggs x 40 grams = 5400 grams of egg whites
Thirdly we divide the egg whites weight by the sugar weight
- 5400/8000 = 0.675 which is larger than the minimum ratio, 3/5 = 0.6.
This means that Keely will have enough eggs to use the whole of the sugar for meringues.
ali will rent a car for the weekend. he can choose one of two plans. the first plan has an initial fee of 55$ and costs an additional $0.70 per mile driven. the second plan has no initial fee but costs 0.90$ per mile driven
Answer:
How far does Ali want to go
Step-by-step explanation:
if the Diagonal of the square is 1250 CM find the length of the sides of the square.
Answer:
625√2 cm
Step-by-step explanation:
The diagonal of a square is √2 times the side length, so the side length is 1/√2 = (√2)/2 times the length of the diagonal:
s = (√2)/2 × 1250 cm = 625√2 cm
The side length is 625√2 cm.
_____
Additional comment
A unit square will have sides of length 1. A diagonal of the square will divide it into two right triangles, each with sides of length 1. The Pythagorean theorem tells you the length of the diagonal (d) will be ...
d² = 1² +1² . . . . . . square of hypotenuse is sum of squares of legs
d² = 2 . . . . . . . simplify
d = √2 . . . . . take square root
That is, for any square, the length of the diagonal is √2 times the side length.
5. © Assessment Matt buys pieces to make
a model car. He buys I block of wood,
4 tires, and 2 cans of paint. Matt wants to
know how many items he bought in all. If
he adds 1 + 2 first, what should Matt add
next? Explain.
HELLO CAN SOMEONE PLEASE ANSWER THIS I WILL MARK YOU THE BRAINLIEST !!!
Answer:
D. is an acute angle
Step-by-step explanation:
Acute angles measure less than 90 degrees.
C is a right angle. A and B is an obtuse angle.
Ken shared $3,600.00 for his three (3) sons in the ratio 2 : 3 : 4. What was the smallest share received?
Answer:
$80000
Step by step explanation:
start by adding all the ratios.
2+3+4=9
next devide $360000 by 9
that should give you $40000
then look at the smallest ratio with is 2 which means you must double the amount.
so that means $40000x2= $80000
$80000 is your answer
hope this helps!
How much paper will be needed to cover the rectangular pyramid shown? A. 80 cm2
B. 128 cm2
C. 144 cm2
D. 256 cm2
Answer:
I think its C. 144 cm2
Step-by-step explanation:
Is this statement true or false? x = 4 is a solution to x – 5 >20
A true
B false
Answer:
B False
I had the same question and got it right
Suppose that every worker in a company received a $2300-per-year raise. How does this affect the mean salary
Answer:
Suppose that every worker in a company received a $2300-per-year raise. How does this affect the mean salary
we will divide 2300 by 12months
which is 191.6
A Washington Post article reported on a study about alcohol consumption and cancer in women. Since 1996, a team of British researchers has been gathering detailed information from 1.28 million women aged 50 to 64. The researchers recorded how much alcohol the women reported consuming when they volunteered for the study and again three years later. The researchers then examined whether there was any link with the 68775 cancers the women developed over an average of the next seven years. They found that even among women who consumed as little as 10 grams of alcohol a day on average (the equivalent of about one drink), the risk for cancer of the breast, liver, and rectum was elevated.
Required:
a. Is this an experiment? Explain your answer.
b. We would prefer a sample survey to using women who volunteer for a study. What population does it appear that the researchers were interested in?
c. What variables did they measure?
Part A
This is not an experiment.
Why not? Because the participants aren't divided into two groups of control group vs treatment group. This is an observational survey in which the researchers are asking each participant about the alcohol consumption level (independent variable) and how it may be tied to the risk of cancer (dependent variable).
======================================================
Part B
The population appears to focus on all women between the ages of 50 and 64.
The sample of the 1.28 million women is not the population, but rather, it ideally tries to approximate the population the best it can.
======================================================
Part C
The independent variable is the alcohol consumption rate, i.e. how much beer/wine/etc was consumed. Think of it like the variable x as the input of a function.
The dependent variable is the cancer rate. It's similar to the y output of a function. The dependent variable depends on the independent variable; hence the name. The study is trying to see if altering the amount of alcohol somehow alters the rate of cancer.
Keep in mind that cancer is still a very ongoing subject of research. Unfortunately we still have a lot to learn about it. Despite this, it's highly unlikely that alcohol is the direct cause of cancer. So instead, we consider that these variables are correlated in some way even if a link is found/proven. Other factors need to be considered such as
fitness leveldiet, other than the alcohol consumptionenvironmental factors other than the alcohol consumption (eg: does the woman live nearby an industrial plant perhaps?)geneticspossibly other factors I haven't thought of to list herePractice Rounding to the Nearest Ten
37 rounds to
by completing the square x2-14x+19=0
X = 19/12
Step 1: X * 2 - 14x + 19 = 0
Step 2: 2x - 14x + 19 = 0
Step 3: -12x + 19 = 0
Would someone help me understand this? Thank you
Answer:
A(1,5), B(-3,4),C (-1,-2), D(5,-2), E(3,0), F(-4,-1)
Step-by-step explanation:
So you are supposed to be looking for the coordinates. Starting from the origin, (0,0) to the right would be 1, 2, 3,4,5,6....., to the left would be -1,-2,-3,-4,-5,6-..... Up would be 1,2,3,4,5,6.... Down would be -1,-2,-3,-4,-5,-6....
A(1,5),
B(-3,4)
C (-1,-2)
D(5,-2)
E(3,0)
F(-4,-1)
42 percent of what number is .21
Answer:
0.5
Step-by-step explanation:
0.42 x = 0.21
x=0.5
Find the value of x. Write your answer in simplest form.
x =
Answer:
x = 7
Step-by-step explanation:
The relevant trig relation is ...
Sin = Opposite/Hypotenuse
sin(30°) = x/14
x = 14·sin(30°) = 14·0.5 . . . . . multiply by 14 and evaluate
x = 7
_____
Additional comment
The triangle shown is a 30°-60°-90° triangle. The ratios of sides, shortest-to-longest, are ...
1 : √3 : 2
As we have seen here, the shortest side is 1/2 the length of the longest side, so x = 14/2 = 7.
This triangle and these ratios show up often, so it can be worthwhile to remember these ratios.
