Answers
Answer:
This is not a direct variation.Step-by-step explanation:
Direct variation:
mathematical relationship between two variables that can be expressed by an equation in which one variable is equal to a constant times the other.
(y varies directly with x with a constant variation of k)
[tex]y=kx;\ k\neq0[/tex]
[tex]y=kx\qquad|\text{divide both sides by}\ x\\\\\dfrac{y}{x}=k\Rightarrow \dfrac{y}{x}=constant[/tex]
[tex]21.\\\\x=y+2\qquad|\text{subtract 2 from both sides}\\\\x-2=y\qquad|\text{divide both sides by}\ x\\\\1-\dfrac{2}{x}=\dfrac{y}{x}\ro\dfrac{y}{x}=1-\dfrac{2}{x}\neq constant[/tex]
Related Questions
The following chart shows the number of rows in an auditorium and the total number of seats. What equation defines the number of seats with respect to the number of rows.
a) S=20R+100
b) S=40R+120
c) S=20R+60
d)S=20R
Answers
Answer:
Answer: c) S=20R+60
Step-by-step explanation:
Linear Model
The chart supplied shows the number of rows (R) in an auditorium and the total of seats (S).
We'll find the equation that relates them. The equation of a line can be expressed in the slope-intercept form:
S = mR + b
Where m is the slope and b is the intercept.
The slope is found by:
[tex]\displaystyle m=\frac{S_2-S_1}{R_2-R_1}[/tex]
We'll use two sample points (20,460) and (45,960):
[tex]\displaystyle m=\frac{960-460}{45-20}=\frac{500}{25}[/tex]
m = 20
The value of b can be found by using one of the points, for example (20,460), and having m=20:
460 = 20*20 + b
Thus: b = 460 - 400 = 60.
The equation is:
S = 20R + 60
You can test the other points and check they belong to the same line.
Answer: c) S=20R+60
did I get this answer right?
Answers
Answer:
Yes
Step-by-step explanation:
Yes
Answer:
No, the answer is suppose to be 9.
Step-by-step explanation:
if you did 54 divided by 18 you would get 3. so if you do 54 divided by 3 you would get 18. then if you do 27 divided by 3 it would equal 9.
so therefore your answer will be 9.
please mark as brainly.
A recipe calls for 0.8 oz of cheese. If I make 35 batches of this recipe, how many ounces of cheese do I need?
Answers
Answer:
28
Step-by-step explanation:
mm ya
can you help with this?
Answers
Answer: 10/3 or 3 1/3
Step-by-step explanation:
Answer:2/15
Step-by-step explanation:
How many pages are in a small photo book that costs $57?
Answers
Answer:
38 pages
Step-by-step explanation:
The cost per page is $1.50. So a book costing $57 would have 57 ÷ 1.50 = 38 pages
Answer:
online it said 38 pages so........:)
Step-by-step explanation:
What is 6 to the power of 7 divided by 6 to the power of 5, in index form?
Answers
Help pls I am in 4th and my sister is at school so she can't help pls I was sick when we learned this I need like a couple more and then I can do the rest :(
Answers
Answer:
3/20
Step-by-step explanation:
you multiply 1/4 and 2/5 to get the answer
A hummingbird weighed w ounces. One day the hummingbird drank 8 times its weight in water and ate half its weight in food. Which equation can be used to find t, the combined weight of the water and the food, in ounces, that the hummingbird had on this day?
need this asap
Answers
Answer:
t = 8 1/2wStep-by-step explanation:
The hummingbird drank 8 times its weight in water:
8wThe hummingbird ate half its weight in food
1/2wRequired equation:
t = 8w + 1/2w ⇒ t = 8 1/2wAnswer:
t= 8w + 1/2w
Step-by-step explanation:
Which ordered pair represents y as a function of x?
A. {(−2, 0), (−1, 0), (−1, 1), (0, 2)}
A. {(−2, 0), (−1, 0), (−1, 1), (0, 2)}
B. {(0, 1), (1, 3), (2, 5), (3, 7)}
B. {(0, 1), (1, 3), (2, 5), (3, 7)}
C. {(−1, 4), (−1, 6), (0, 4), (1, 8)}
C. {(−1, 4), (−1, 6), (0, 4), (1, 8)}
D. {(9, 5), (9, −5), (11, 7), (11, −7)}
Answers
Answer:
B
Step-by-step explanation:
Here, we want to select an option that represents y as a function of x
We simply want to select an option which is a function
Now, the answer in this case is one in which there are no repeating values of x and y
What this means is that all x values and all y values exactly have a single relationship between each of them
No y values has two x values and no x values links to 2 y-values
With this in mind, the correct answer is ;
option B
Giving 40 points PLEASE help ASAP The ratio of the number of teachers to students in a school is 3:35. The ratio of male students to the number of female
students is 2:5. There are 500 female students. How many teachers are there?
In the box, type the answer and tell how you found it. You may also do your work on a separate sheet of paper and upload it
in the box below.
Answers
Answer: 500 female students. 2:5 ratio for males means 200 male students. 500 female plus 200 male equals 700 students total. There are three teachers for every 35 students, so 700/35 multiplied by three equals 60 teachers.
Solve the equation.
y + 6 = –3y + 26
y = –8
y = –5
y = 5
y = 8
Answers
Answer:
y=5
Step-by-step explanation:
Answer:
C
Step-by-step explanation:
EDGE
i need help asap please!
Answers
Must be CD becuase the readious is what goes across
a. Harry started a new job where he earns the same amount every hour. Last week, he worked 9 hours and earned $108. Write the linear equation for this situation, where y represents the money earned, in dollars, and I represents the number of hours worked.
Answers
Answer:
I=12
Step-by-step explanation:
y=108
I=108/9
I=12
Answer:
y = 12lStep-by-step explanation:
This is the proportional relationship
Let the equation be:
y = rl, where y- money earned, l- number of hours, r- hourly rateWe have:
108 = 9rr = 108/9r = 12The required equation is:
y = 12lThese algebraic expressions are not equivalent. Explain
why they are not equivalent.
1
x2
2
+ 8.x-x2 - 6x
222 - 2x
Answers
Answer:
in the 1st row, one x^2 is positive while the other is negitive, making the total zero. also in the top row 8x+(-6x) = 2x, but in the 2nd row is says -2x, showing they are not the same. Also there is no -1/2 in the 2nd row like there is in the 1st row
Step-by-step explanation:
consider the following equation x+4/x-6+3/2x+5=7 What are the constraints on x? Select all that apply.
Answers
Please help
What is the fraction in decimal form?
7/5
Enter your answer in the box.
Answers
Answer:
1.4
Step-by-step explanation:
Thanks plssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssss
Find the slope of the line passing through the points
(-3. 7) and (2. -6).
Answers
Answer:
( 3 , 7 )
Step-by-step explanation:
maybe this will help you
What’s the answer ?? The triangle says 84 degrees
Answers
Answer:
x = 48°
Step-by-step explanation:
x + x + 84° = 180°
2x = 180° - 84°
2x = 96°
x = 96°/2
x = 48°
Answer:
84+2a=180
2a=180-84
= 96
2a=96/2
=48
So, each angles are 48 degrees.
If my answer is wrong, please inbox me! ≧ω≦
Write an inequality for the following scenario
Mrs. Brownlee plans to have her daughter's party at the Bounce House. The Bounce House charges $150 for the delivery and set up of an inflatable. They
charge an additional 59 per guest for food and party favors. Mrs. Brownlee has budgeted for at most $300 for the party. How many guests, g, may attend?
O 150 +9g < 300
O 150 + 99 > 300
O 150 + 9g < 300
O 150 + 99 > 300
Answers
Answer:
1st or 3rd i think. hope this helps.
finish the table and write the equation
Answers
Answer:
29
Step-by-step explanation:
Each number has 4 in difference
Answer:
29
Step-by-step explanation:
25+4=29
find the roots of the following equation by factorisation. x+1/x-1- x-1/x+1=5/6: X doesn't equal to 1,-1
Answers
Answer:
x= -1/5
hope this helps you
Answer:
x = - [tex]\frac{1}{5}[/tex], x = 5
Step-by-step explanation:
Given
[tex]\frac{x+1}{x-1}[/tex] - [tex]\frac{x-1}{x+1}[/tex] = [tex]\frac{5}{6}[/tex]
Multiply through by 6(x - 1)(x + 1) [ the LCM of the denominators ]
6(x + 1)² - 6(x - 1)² = 5(x - 1)(x + 1) ← expand factors and simplify
6(x² + 2x + 1) - 6(x² - 2x + 1) = 5(x² - 1)
6x² + 12x + 6 - 6x² + 12x - 6 = 5x² - 5
24x = 5x² - 5 ( subtract 24x from both sides )
0 = 5x² - 24x - 5 ← in standard form
0 = (x - 5)(5x + 1) ← in factored form
Equate each factor to zero and solve for x
5x + 1 = 0 ⇒ 5x = - 1 ⇒ x = - [tex]\frac{1}{5}[/tex]
x - 5 = 0 ⇒ x = 5
HELP THIS IS DUE IN 1:00 PM AND I WILL GIVE BRAINLIEST
Answers
Answer:
1) They were multiplied by one power of ten because 2.5x 1^10 is 25, and so that it is easier to divide.
19.625/ 2.5 * 10/10 = 196.25/25
Hope this helps plz hit the crown ;D
True or False. Horizontal translations move a graph up and down.
Answers
Answer:
false
Step-by-step explanation:
horizontal is left and right
Help Please I need to finish my assignments still
Answers
Answer:
4.155
Step-by-step explanation:
4.53-0.375=4.155
the domain of y=log(9-x^2),xER, is
Answers
Step-by-step explanation:
log(z) is defined when z > 0.
For log(9 - x²) to be defined, we have 9 - x² > 0.
=> x² < 9, -3 < x < 3.
The domain of y = log(9 - x²) is (-3,3).
5) A collection of nickels and dimes is retrieved from a soft drink
machine. There are five times as many nickels as dimes and the total
value of the coins is $27.75. Find the number of dimes and the number of
quarters.
Answers
What is the domain of f?
Choose 1 answers
All real values of r such that=0
All real values of such that=0
All real values of such that r < 0
All real values of r such that >0
All real values of
Answers
Answer: C) All real values of x such that [tex]x \le 0[/tex]
In other words, x must be 0 or smaller.
===================================================
Explanation:
The reason why is because we must make the stuff under the square root to never be negative. We must make -2x be 0 or larger.
So,
[tex]-2x \ge 0 \\\\-2x+2x \ge 0+2x \ \text{ ... add 2x to both sides}\\\\0 \ge 2x\\\\2x \le 0 \ \text{ ... flip both sides, and the inequality sign}\\\\x \le 0/2 \ \text{ ... divide both sides by 2}\\\\x \le 0[/tex]
As an example, if x = -2, then -2x = -2(-2) = 4 is positive. Applying the square root to a positive number is valid.
But if x = 5, then -2x = -2*5 = -10 is under the square root, which is not allowed.
What is the equation of the line that passes through the point (-2,-2) and has a
slope of 4?
Answers
Plug in point
-2 = 4(-2) + b, b = 6
Solution: y = 4x + 6
please help!!!
i've tried to search to understand but they all look so similar
Answers
Answer:
Since dilation is not mentioned in the answer options, thus, the correct option is 'None of the above'.
Step-by-step explanation:
We know that when an object is dilated by a scale factor, it gets reduced, stretched, or remains the same, depending upon the value of the scale factor.
If the scale factor > 1, the image is enlarged If the scale factor is between 0 and 1, it gets shrunk If the scale factor = 1, the object and the image are congruentThe figure seems to have enlarged by a certain scale factor. Thus, the figure b is a result of dilation of the original figure by a certain scale factor.
Rotation, Reflection, and translation do not affect the size of the original figure.
Since dilation is not mentioned in the answer options, thus, the correct option is 'None of the above'.
Find the midpoint of the segment with the following endpoints.
(10, 7) (2, 1)
Answers
Answer:
(6,4)
Step-by-step explanation:
Midpoint=((x1+x2)/2 ,(y1+y2)/2)
((10+2)/2 ,(7+1)/2)
(6,4)
x1=10
x2=2
y1=2
y2=1