For the inverse variation equation xy = k, what is the constant of variation, k, when x = 7 and y = 3?
Answers
Answer:
k = 21
Step-by-step explanation:
\(xy = k\\\\Plugging\: x = 7\: and\: y = 3,\: we\; find:\\7\times 3 = k\\21 = k\\\huge\red{\boxed{k = 21}}\\\)
Related Questions
Can someone help me with this question!!
Answers
Answer:
8
Step-by-step explanation:
area = bh/2
32.4 yd² = 8.1 yd × s / 2
s = 8 yd
A movie theater sold 6,030 tickets in 30 days. They sold the same number of movie tickets every night.
Part A
How many tickets did the movie theater sell each night? Show the equation you used to find the answer.
Part B
Jamie says that the movie theater sold 21 tickets each night. Explain Jamie’s reasoning.
Part C
How can understanding the relationship between multiplication and division help Jamie determine that her answer is incorrect?
Answers
Answer:
Part A : 201
Step-by-step explanation:
6030/30
because they sold the same number of movie every night ..... I'm not sure
B: Jamie did 63/3 and not 6,030/30
C: understanding that 0’s don’t just add nothing and do add value and are important for proper multiplication/division would help Jamie
Convert phrases to numerical expressions and solve
Three to the power of three minus seven plus ten
Answers
............
.......................
Help with these please. Thank you
Answers
Hope this helps
Answer:
2 )= 6 inches per day
39 divided by 6.5 = 6
can someone help me wit this?
Answers
Answer for number 2 is: -1
Answer for number 3 is: -35/6 or in decimal form, -5.83
Estimate each product using Front End Estimation.
7) 315 x 8
8) 562 x 7
9) 82 x 15
10) 711 x 88
11) 126 x 95
Answers
Answer:
7.) 2400
8.) 4200
9.) 1600
10.) 63000
11.) 10000
Step-by-step explanation:
You only round numbers in the left most place like (4687 to 5000 and 29 to 30)
7.) 315 * 8
round 315 to 300
300 * 8 = 2,400
8.) 562 * 7
round 562 to 600
600 * 7 = 4,200
9.) 82 * 15
round 82 to 80 and 15 to 20
80 * 20 = 1,600
10.) 711 * 88
round 711 to 700 and 88 to 90
700 * 90 = 63,000
11.) 126 * 95
round 126 to 100 and 95 to 100
100 x 100 = 10,000
Jim bought 5 packs of red bouncy balls, 2 packs of yellow bouncy balls, and 7 packs of green bouncy balls. There were 7 bouncy balls in each package. How many bouncy balls did Jim buy in all?
Answers
Answer:
108 bouncy balls
Step-by-step explanation:
2*7=14
5*7=35
7*7=49
14+35+49+108
Write 162 as a product of primes.
Use index notation when giving your answer.
Answers
=2*3^4
Which of the following is the major arc for the circle shown below?
A. ATZ
B. TZ
C. AZT
D. AT
Answers
Answer:
Option C
Step-by-step explanation:
Major Arc is the arc with the greatest length So , here Major Arc is:
AZT
Cuz the person above said it
Can someone plz help me with these 3 math questions plz and plz explain how u got the answer
Answers
Answer:
1.102.08Step-by-step explanation:
Numbers A=1/2h(a+b) =(9.6+15.92)8÷2 =25.52×4 =102.08What is the solution to the equation?
9/10 x+4/5=28.3
choices:
x=133/5
x=275/9
x=97/3
explain why
Answers
Answer:
275/9
Step-by-step explanation:
9/10x + 4/5 = 28.3
leave out the decimal sign in 28.3 and then turn it into a fraction.
9/10x + 4/5 = 283/10
Multiply them by 10
9/10x • 10 = 9x
4/5 • 10 = 8
283/10 • 10 = 283
9x + 8 = 283
Separate the x from the non x
9x = 283 - 8
= 275
9x = 275
275/9 = x
The solution to the equation 9/10 x+4/5=28.3 is x = 275/9, Option B is correct.
What is Equation?Two or more expressions with an Equal sign is called as Equation.
The given equation is 9/10 x+4/5=28.3
Nine by ten times of x plus four by five equal to twenty eight point three
x is the variable in the equation
We have to solve for x
Subtract 4/5 from both sides
9/10x = 28.3 - 4/5
9/10x= 28.3 -0.8
9/10x=27.5
9x=27.5×10
9x=275
Divide both sides by 9
x=275/9
Hence, the solution to the equation 9/10 x+4/5=28.3 is x = 275/9, Option B is correct.
To learn more on Equation:
https://brainly.com/question/10413253
#SPJ2
simplify, justify your steps using the communitive, associative and distributive properties when necessary
3a + 2b + 5a
Answers
Answer:
8a+2b
Step-by-step explanation:
you can add 3a and 5a to get 8a but cant do anything with 2b so it stays 2b. therefore it becomes 8a+2b. hope this helps!! :)
Answer:
8a + 2b
Step-by-step explanation:
Step 1. Combine your like terms( Like terms are the numbers with the same variable)
3a + 2b + 5a
3a + 5a= 8a
Step 2. Bring down the other term which is 2b( Do not add 8a + 2b because they are not like terms)
8a + 2b
and your done :)
Remeber: like terms have the same variable.
Example: 2a + 4a
Which is the more reasonable measurement of the distance between the tracks on a DVD: 7.4 ⋅ 10−4 mm or 7.4 ⋅ 104 mm? Justify your answer.
Answers
Answer:
A- 7.4 ⋅ 10−4 mm
Step-by-step explanation:
Well, to solve this problem, we must convert the number and / or the units in a more imaginable one.
We are given two choices:
a. 7.4 x 10^-4 mm
b. 7.4 x 10^4 mm
Converting the units and numbers into meters and general form, respectively. (What is meant by general form is not to write it in scientific notation).
a. 7.4 x 10^-4 mm (1 m / 1000 mm) = 0.00000074 m
b. 7.4 x 10^4 mm (1 m / 1000 mm) = 74 m
Now comparing the two values above, what do you think is the distance between the tracks on a DVD? Definitely NOT 74 m or else the DVD is extremely big. Therefore the correct is the smaller one.
Answer:
desdrgtfyguhijokhbgftrdszxfcghbjklmmjhugtfdszxbnm
Step-by-step explanation:
uhgfdfcyhuihygtfy78ytrer68trdxtygnbjmn b
A recipe needs
3
4
cup of sugar to make 24 cookies. How much sugar will be needed to make 36 cookies?
Answers
Answer:
Do u still need the answer to this?
Step-by-step explanation:
Im not sure
Answer:
1 1/8 cup
Step-by-step explanation:
I'm literally Gordon Ramsey Jr. my guy
please help me, thank you
Answers
Answer:
-19.59
Step-by-step explanation:
can I please have brainliest? :)
Answer:
-19.59
Step-by-step explanation:
Something I use when I need help on math is Desmos (Just type in Desmos in the search bar)
please help!
Try to solve the equation below.
2x^2+18=10
Explain why this equation has no real number solutions.
Answers
Answer:
Step-by-step explanation:
The discriminant of this equation, i.e, D=\(b^{2}-4ac\) is less than 0:
D= 0-(4*2*18) --> which is clearly negative
When D is less than 0, the equation has no real number solutions.
Therefore, \(2x^{2}+18=0\) has no real roots
Answer:
Step-by-step explanation:
0 has no roots so thats one, and im just trying to complete a challenge so sorry if im wrong :( but make other person brainliest they did good job :)
PLz Help -Moore High bought team shirts for 17 adults
and 87 students. Norman High bought team
shirts for 19 adults and 121 students. The two
schools used a vendor that charges a dollars
for each adult shirt and s dollars for each
student shirt. If Moore High paid a total of
$9,845 and Norman High paid a total of $14,730,
then write the equation which can be used to
find the price of each adult shirt and each
student shirt.
Answers
Answer
Step-by-step explanation:
Answer:4885
Step-by-step explanation:subtract both of the total numbers which would equal s so s=4885
The circle graph describes the distribution of preferred transportation method from a sample of 300 randomly selected San Francisco residents.
circle graph titled San Francisco Residents' Transportation with five sections labeled walk 40 percent, bicycle 8 percent, streetcar 15 percent, bus 10 percent, and cable car 27 percent
Which of the following conclusions can be drawn from the circle graph?
Cable Car is the preferred transportation for 75 residents.
Bicycle is the preferred transportation for 30 residents.
Together, Streetcar and Bus are the preferred transportation for 25 residents.
Together, Bus and Bicycle are the preferred transportation for 54 residents.
Answers
Answer: Together, Streetcar and Bus are the preferred transportation for 25 residents.
Step-by-step explanation: The streetcar is preferred by 15 and the bus is preferred by ten which together equals 25 residents.
a/2+5>4
PLS HELP I WILL GIVE BRAINLY IF YOU'RE CORRECT
Answers
Step-by-step explanation:
a/2+5>4
a=4
4 divided by 2 = 2
2+5=7
7>4
Answer:
7>4
Step-by-step explanation:
a/2+5>4
a=4
4 divided by 2 = 2
2+5=7
7>4
Hope this helps! :)
ill give Brainliest to first CORRECT answer PLEASE HELP ASAP
Answers
Answer:
8
Step-by-step explanation:
Answer:
8km
Step-by-step explanation:
how many 25 cents make 20 dollars
Answers
Answer:
0.25x80 will equal 20 20 divided by 80=0.25
Step-by-step explanation:
Please help! NO LINKS! (Scientific Notation)
** Only if you know the answer
Answers
It is 8 times 10 to the 4th power.
The stem-and-leaf plot displays data collected on the size of 15 classes at two different schools.
Mountain View School Seaside School
0 5, 8
9, 8, 2, 0 1 0, 1, 2, 5, 6, 8
8, 7, 6, 5, 5, 4, 4, 3, 1, 0 2 5, 5, 7, 7, 8
0 3 0, 6
Key: 2 | 1 | 0 means 12 for Mountain View and 10 for Seaside
Part A: Calculate the measures of center. Show all work. (2 points)
Part B: Calculate the measures of variability. Show all work. (1 point)
Part C: If you are interested in a smaller class size, which school is a better choice for you? Explain your reasoning. (1 point)
Answers
For Mountain View School:
Data: 0, 0, 0, 0, 1, 2, 3, 4, 4, 5, 5, 5, 5, 6, 7, 8, 8, 8, 9
Mean: (0 + 0 + 0 + 0 + 1 + 2 + 3 + 4 + 4 + 5 + 5 + 5 + 5 + 6 + 7 + 8 + 8 + 8 + 9) / 19
= 100 / 19
≈ 5.26
To find the median, we need to arrange the data in ascending order: 0, 0, 0, 0, 1, 2, 3, 4, 4, 5, 5, 5, 5, 6, 7, 8, 8, 8, 9.
The median is the middle value, which is the 10th value in this case.
Median: 5
For Seaside School:
Data: 0, 0, 0, 1, 1, 2, 2, 4, 5, 5, 5, 5, 6, 7, 7, 8, 8, 8, 9
Mean: (0 + 0 + 0 + 1 + 1 + 2 + 2 + 4 + 5 + 5 + 5 + 5 + 6 + 7 + 7 + 8 + 8 + 8 + 9) / 19
= 80 / 19
≈ 4.21
To find the median, we need to arrange the data in ascending order: 0, 0, 0, 1, 1, 2, 2, 4, 5, 5, 5, 5, 6, 7, 7, 8, 8, 8, 9.
The median is the middle value, which is the 10th value in this case.
Median: 5
Now let's calculate the measures of variability, specifically the range and interquartile range (IQR).
Range: The range is the difference between the largest and smallest values in the dataset.
For Mountain View School:
Range: 9 - 0 = 9
For Seaside School:
Range: 9 - 0 = 9
Interquartile Range (IQR): The IQR is the difference between the third quartile (Q3) and the first quartile (Q1) and measures the spread of the middle 50% of the data.
For Mountain View School:
Q1 = 3
Q3 = 7
IQR = Q3 - Q1 = 7 - 3 = 4
For Seaside School:
Q1 = 2
Q3 = 7
IQR = Q3 - Q1 = 7 - 2 = 5
To determine which school is a better choice for a smaller class size, we can consider both the mean and the median.
Both the mean and median for Mountain View School are higher than those for Seaside School. This suggests that, on average, the class sizes at Mountain View School are larger than those at Seaside School. Therefore, if you are interested in a smaller class size, Seaside School would be a better choice
For Mountain View School:
- Median: The median class size is the middle value, which is 25.
- Mean: The mean class size is the sum of all the class sizes divided by the total number of classes, which is (29 + 28 + 28 + 27 + 25 + 24 + 24 + 23 + 21 + 20 + 19 + 18 + 15 + 13 + 10) / 15 = 21.27.
For Seaside School:
- Median: The median class size is the middle value, which is 20.
- Mean: The mean class size is the sum of all the class sizes divided by the total number of classes, which is (25 + 25 + 27 + 27 + 28 + 28 + 28 + 30 + 31 + 35 + 36 + 38 + 40 + 43 + 45) / 15 = 31.13.
Part B:
For Mountain View School:
- Range: The range is the difference between the largest and smallest values, which is 29 - 10 = 19.
- Interquartile Range (IQR): The IQR is the difference between the third quartile (Q3) and the first quartile (Q1). From the stem-and-leaf plot, we can see that Q1 is 20 and Q3 is 28. Therefore, the IQR is 28 - 20 = 8.
For Seaside School:
- Range: The range is the difference between the largest and smallest values, which is 45 - 25 = 20.
- Interquartile Range (IQR): The IQR is the difference between the third quartile (Q3) and the first quartile (Q1). From the stem-and-leaf plot, we can see that Q1 is 27 and Q3 is 38. Therefore, the IQR is 38 - 27 = 11.
Part C:
If you are interested in a smaller class size, Mountain View School is a better choice for you because it has a lower mean and median class size than Seaside School.
Please help me! im on an assignment an cant figure it out
Answers
Step-by-step explanation:
The difference beteen 9.2 ounces and 8.1 ounces is 1.1 ounces
and the difference in price is .49
so 1.1 ounces cost .49
$ .49 / 1.1 oz = $ .445 per ounce
Then Reid's bowl should cost 7.8 oz * $ .445 / oz = $3.47
I need help on this question
Answers
Answer:
D 64.5 square centimeters
Step-by-step explanation:
the hexagon can be divided into 6 identical triangles with base 5cm and height 4.3cm
Area of the hexagon:
(5 x 4.3 /2) x 6 = 64.5
2023
as a mixed number in simplest form. −4 9/13
Answers
Answer:
-61/13
Step-by-step explanation:
a) Multiply -4 and 13 and add 9
-61/13
help i dont know how to find the surface area. a step by step explanation would help me better.
Answers
Answer:
256
Step-by-step explanation:
so there is 4 rectangles, 1 square, and 4 triangles within the composite figure in the question.
so basically you find the area of each of those shapes and add them together and that's your answer.
the rectangles width is 4 and length is 12, to find the area of a rectangle you do length times width so 4 times 12 which is 48, you have 4 rectangles so 48 times 4, which is 192.
the squares sides are 4 so you multiple two of the sides so 4 times 4 which is 16.
now we have the triangles, the formula for the area of a triangle is A=\(\frac{hx_{b}b }{2}\), so b is base, the base is 4, h is height, the height is 6, so you plug in those numbers in the formula and you get 12. you have 4 triangles so 12 times 4 which is 48.
so now you add them all together 192 + 16 + 48 = 256
1. Thad bought 8 notebooks that cost $3.79 each. If he gave the cashier a $50 bill, how much change did he get back from the purchase?
2.Lucy purchases a car for $16,314.40. If she makes a payment each month for the next 40 months, how much will she pay each month. (enter your answer as $dollars.cents)
Answers
Answer:
Step-by-step explanation:
1. Cost of each notebook = 3.79
Cost of 8 notebooks = 3.79 x 8 = 30.32
Amount gave to cashier = 50
Change = 50 - 30.32 = 19.68
Og. Cost - $16,314.40
Months - 40
I divided $16,314.40 by 40 and got $407.86
Lucy will pay $407.86 dollars each month for 40 months.
I want to make sure im doing this right, if you could help it would be great
Answers
Answer:
84
Step-by-step explanation:
7(9+3) you multiply 7 to both numbers like this
63+21 and then you can simplify
84
If you need the other 3 done just comment on this question to tell me
Also please mark brainliest
Answer:
Step-by-step explanation:
1.84
2.32
3.30
4.88
1.
84 because PEMDAS(parenthesis/Exponents/Multiply/Divide/Add/Subtact) says you do parenthesis first. So you add 9 and 3 to get 12. The you do 12*7 to get 84.
What is the measure of angle x?
A. 25°
B. 35°
C. 45°
D. 55°
Answers
Why because it is a complementary angle which sums up to 90 degrees subtract 90 and 55 you get 35 degrees
Solution:
Note that:
55 + x + 90 = 180Solve the equation to find the value of x.
55 + x + 90 = 180=> 145 + x = 180=> x = 180 - 145 = 35°Option B is correct.