z varies jointly with x, and y, and z=7 when x= 2, y= 2

Answers

Answer 1

Answer:

56

Step-by-step explanation:

Complete question:

Z varies jointly with x and y , x=2 and y=2, z=7. Find z when x=4 and y=8 using joint variation . (I need the problem worked out step by step)

If z varies jointly with x, and y, this is expressed as;

z = kxy

If z=7 when x= 2, y= 2

7  = k(2)(2)

7 = 4k

k = 7/4

To get z when x= 4 and y = 8

z = kxy

z =7/4 (4)(8)

z = 7*8

z = 56

Hence the value of z is 56


Related Questions

Stephanie is earning simple interest of 3.5% on her money each month. She currently has $1325 in her account. What will her balance be in 5 months?

Answers

Answer:

$1556.88

Step-by-step explanation:

Since Stephanie is earning simple interest and not compound interest, we can multiply her interest rate for each month by how many months we are calculating for.

0.035 x 5 = 0.175

Then multiply that by her current balance but change the 0 in front of the 0.175 to a 1 to reduce the number of steps we have to take. (It automatically adds what is earned in interest to her current balance.)

1.175 x 1325 = 1556.875

help me please I don't understand this lesson​

Answers

A. CPCTC (congruent parts of congruent triangles are congruent)

what is x in this equation |x−2| – 7 = –3

Answers

Answer:

6

Step-by-step explanation:

Hope this helps

How do you know
the quotient of 639 /
6 is greater than
100 before you actually divide

Answers

Answer:

because since the question is 639 / 6

we immediately know that 600 / 6 is 100

639 / 6 = 106.5

Answer:

You just need a little conversion to get the answer.

[tex]\frac{639}{6}=\frac{600}{6}+\frac{39}{6}\\ = 100+\frac{39}{6} >100[/tex]

If jon had 2,881 and tia had 4,163 how much more money tia has then jon

Answers

Answer:

Tia has $1,282 more than Jon

Step-by-step explanation:

4,163-2881 = 1282

Tia has $1,282 more than Jon

Answer:

1282

Step-by-step explanation:

What is 4(b + 2), if b = 7?

Answers

Answer:

the answer would be 36

Step-by-step explanation:

hoped I helped:)

Answer:

Hey mate....

Step-by-step explanation:

This is your answer....

= 4×7+2

= 28+2

= 30

Hope it helps you....

Mark me as the brainliest....

FOLLOW ME....!!!!!!

(Algebra) What is the lowest common denominator of 3/8x and 5/18x?

Answers

Answer: 3/8x

To find the least common denominator first convert all integers and mixed numbers (mixed fractions) into fractions. Then find the lowest common multiple of the denominators. This number is same as the least common denominator .You can then write each term as an equivalent fraction with the same LCD denominator.

What are two points that represent Justine's function for the yards left to hike in terms of the hours she's spent hiking?

Answers

Answer:

(0,320) and (4,0)

Step-by-step explanation:

The question has missing details. So, I've added the complete question as an attachment.

From the question, we understand that:

Justine started when Michael was 320 yards from the top.

This coordinate can be represented as (0,320)

0 represents the time Justine started and 320 represents the number of yards left.

Every minute, Justine covers 80 yards.

This implies that:

At 1 minute, Justine will have: (320 - 80) yards left

At 2 minutes, Justine will have: (320 - 80 - 80) yards left

At 3 minutes, Justine will have: (320 - 80 - 80 - 80) yards left

At n minutes, Justine will have (320 - 80n) yards left

So, possible coordinates are:

[tex](x_1,y_1) = (0,320)[/tex]

[tex](x_2,y_2) = (1,320-80*1) = (1,240)[/tex]

[tex](x_3,y_3) = (2,320-80*2) = (2,160)[/tex]

[tex](x_3,y_3) = (3,320-80*3) = (3,80)[/tex]

[tex](x_4,y_4) = (4,320-80*4) = (4,0)[/tex]

Answer:

Select any two pairs of values from the given table. But, for simplicity, it’s a good idea to select coordinates with integer values. So, two points that represent Justine’s function for the yards left to hike in terms of the hours she’s spent hiking are (1, 270) and (2, 150).

Step-by-step explanation:

Sample Answer

CAN SOMEONE PLEASE HELP THIS IS DUE AT MIDNIGHT (I’ll give brainlist)

Answers

Answer:

d° = 62°

e° = 90°

f° = 27°

g° = 27°

h° = 118°

j° = 62°

k° = 63°

Step-by-step explanation:

The relationship between the given angles are;

k° = 63° (Vertically opposite angles)

63° + f° = 90° (Given complementary angles)

∴ f° = 90° - 63° = 27°

f° = 27°

g° = f° (Vertically opposite angles)

∴ g° = f° = 27°

g° = 27°

e° + 63° + f° = 180° (The sum of angles on a straight equals 180°)

∴ e° = 180° - (63° + r°) = 180° - (63° + 27°) = 90°

e° = 90°

h° = 118° (Vertically opposite angles)

118° + d° = 180° (The sum of angles on a straight equals 180°)

∴ d° = 180° - 118° = 62°

d° = 62°

j° = d° (Vertically opposite angles)

∴ j° = d° = 62°

j° = 62°

What is the interest earned of 600$ at 5% for 2years

Answers

Simple interest , I, is calculated by multiplying the principal, P, by the rate,r, by the time, t, in years:

I = P * r * t

Here, P = $600

r = 0.05 (decimal value for 5%)

t = 2 years

Part a)

The interest earned will be:

I = P * r * t

I = 600 * 0.05 * 2

I = $60  

Part b)  

The balance in the account will be $600 plus the interest earned or:

$600 + 60 = $660

Answer:

$60 interest

Step-by-step explanation:

divide 5 by 100 = 0.05

multiply 0.05 by 600 = 30

then multiply 30 by the number of years (2) 30×2= 60

60 dollars interest

I think

I need help getting the answer

Answers

Answer:

Step-by-step explanation:

The center is at (2,-7). The radius is 2.

(x-2)² + (y+7)² = 2²

helppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppp
:>

Answers

Answer:

Answer: B

Step-by-step explanation:

does not show up on graph

what is the slope of a line parallel to the line who's equation is 5x-y=-9?​

Answers

Answer:

5

Step-by-step explanation:

the slopes will be the same if they are parallel

reagrange the equation to find the gradient

5x-y = -9

y= 5x+9

gradient = 5

HOW MANY TIMES DOES 6 GO INTO 25

Answers

Answer:

25/6 = 4 with a remainder of 1

Answer:

the answer is

25÷6=4.1 because it is

need help on this !!!!!

Answers

Answer:

17

Step-by-step explanation:

Remark

In this formation, the chords cut each other so that

Equation

(3x - 1) * 3 = 12*(x -2)        Remove the brackets.

Solution

9x - 3 = 12x - 24                       Add 24 to both sides.

9x - 3 + 24 = 12x - 24 + 24      Combine

9x + 21 = 12x                            Subtract 9x from both sides

9x - 9x +21 = 12x - 9x

21 = 3x                                     Divide by 3

21/2 = 3x/3              

7 = x

Find QR

QR = 12 + x - 2

QR = 10 + 7

QR = 17

Mr tan saves 960$ a month. He wants to go to a holiday that costs 4200 $. What is the least no.Of months will take to save for the holiday

Answers

Answer:

If he has no other expenses, 5

Step-by-step explanation:

4200/960

five, if you round up

4.375


Can somebody help me? Preferably with working out if possible

Answers

Answer:

d = 9

Step-by-step explanation:

Given

1 = [tex]\frac{1}{3}[/tex] d - 2 ( multiply through by 3 to clear the fraction )

3 = d - 6 ( add 6 to both sides )

9 = d

Answer:

d=9

Step-by-step explanation:

First we can do same to both side by adding 2 to both sides:

1=1/3d-2

+2     +2

--------------

3 = 1/3d

Then to get the d on its own, we multiply each side by 3

3=1/3d

*3    *3

---------

9=d

Our final answer is 9

i need the answer fast ill give brainliest

y=___

Answers

this topic is trigonometry right?

Help assssaaaaaaap please

Answers

Answer:

f(x) = 165 * x + 3

HELP ASAP PLS PLS PLS

Answers

Answer: vertical

Step-by-step explanation:

Answer: its A

Step-by-step explanation:

a polynomial function with rational coefficients has the given roots. find two additional roots -2i and square root of 10

Answers

Answer:

(-2)(100) or 10^2 is 100

Step-by-step explanation:

(x -2)(x+100) =x

Additional roots of polynomial function P(x) with rational coefficients are (2i) and (- √10).

What is conjugate of complex number?

" If z = a +bi be the given complex number, then its conjugate is represented by [tex]\bar{z}[/tex] = a -bi , where  real parts remain same only imaginary part  get changed with opposite sign."

Theorem used

Conjugate Root theorem

Complex conjugate root theorem states that if P(x) is a polynomial in one variable with real coefficient , for P(x) if one root is a + bi  with real numbers a and b then its conjugate that is a - bi is also another additional root of P(x).

According to the question,

Two given roots of polynomial function with rational coefficients are -2i and √10.

As per Conjugate root theorem,

Here one root is 0 - 2i then other root is its conjugate 0 + 2i

Also one root is 0 + √10 then another root is 0 - √10.

Therefore, two additional roots are 2i and -√10.

Hence, additional roots of polynomial function P(x) with rational coefficients are (2i) and   (- √10).

Learn more about conjugate of complex number here

https://brainly.com/question/18392150

#SPJ2

If you can help me, I would be very happy.

Answers

Answer: 116 round that to the nearest hundreth.  

I hope this helped you well.

if i had 2 cats and my mom bought me 4 dogs how many animals is that in total​

Answers

Answer:

2 cats + 4 dogs = 6 animals in total.

:)

How do you find surface area of a pyramid on a prism

Answers

The lateral surface area of a regular pyramid is the sum of the areas of its lateral faces.

The total surface area of a regular pyramid is the sum of the areas of its lateral faces and its base.

e MULTIPLE CHOICE QUESTION Now what does it look like after the next step? (hint: PEMDAS)​

Answers

Answer: Multiplication

Step-by-step explanation: The M in PEMDAS stands for Multiplication

Two families went to the movies. The Davis family paid $39 for 2 adult
tickets and 3 student tickets. At the same theater, the Tyler family paid $23
for 1 adult ticket and 2 student tickets. What is the price of a student
ticket?

Answers

Answer:

$7

Step-by-step explanation:

Let a be the price of the adult ticket and s be the price of the student ticket

That means that:

2a+3s=39

and

a+2s=23

Using elimination

-2(a+2s=23)

-2a-4s=-46

-2a-4s=-46

2a+3s=39

Eliminate a:

-s = -7 ; s = 7

I probably made this so much more complicated than it should be but...

For Exercises 1 and 2, write and solve an equation to find each missing length. Round to the nearest tenth if necessary. An observer is standing 30 feet from a flagpole. She is looking at the top of the flagpole. How tall is the flagpole? Round to the nearest tenth if necessary.

Answers

Answer:

21.65 feets

Step-by-step explanation:

First we obtain the angle of elevation :

Using Pythagoras rule :

Cosθ = adjacent / hypotenus

Cos θ = 30 / 37

θ = cos^-1(30/37)

θ = 35.82°

Hence, height of flagpole :

Sin θ = opposite / hypotenus

Sin θ = x / 37

Sin(35.82) = x / 37

0.5853083 * 37 = x

x = 21.65 feets

Height of flagpole = 21.65 feets

8/m=6/15
use cross multiplying

Answers

Answer: m=20

Step-by-step explanation:

PLEASE HELP MEE!!!!!!!!!!!!!!!!!!!

Answers

Answer:

a b c

plz give branliest

Step-by-step explanation:

Answer:

the first answer choice and the 3rd one down.

si el radio de la base de este cilindro es de 15cm y su altura es de 18cm ¿cual es el volumen del cilindro?

Answers

el volumen del cilindro es:
v= 3.1416x(15cm) ^2x18cm
v= 12723.48cm^3
Other Questions
Minerals are part of the Geosphere, which is composed of several layers.O TrueO False Determine if the sequence below is arithmetic or geometric and determine thecommon difference / ratio in simplest form.20, 10, 5, ... Directions: Given the statements below, give your idea using "I believe" if you agree with the statementand " don't believe" if you disagree with the statement Explain your answer in two to three sentences1.The decision to devote yourself to another person for better or worse is called love2.Courtship allows couples to decide whether they want to be committed.3.Affection, trust, love and respect are essential factors of a successful marriage.4.It is the responsibility of husband and wife to work for the successful marriage5.Immature and not compassionate person will have a successful marriage. (x+2)(x+10) - (x-5)(x-4) 2"Every tourist istourist." comment.traveller but everytraveller is not - Since Robert Scott and his crew did not survive their trek to the South Pole, what unusual purpose(s) were served by the captains log? (Select all that apply.)A. It showed how the men behaved during their final days.B. It helped other explorers analyze the fate of the men.C. It explained to Scotts widow what happened to him.D. It provided a detailed map of his route to the South Pole. Explain why is ortho nitrophenol more acidic than ortho methoxyphenol Several friends had gathered at Jims house during the day off from school lastweek. It was 12:30 and Dan suggested, Lets order some pizza for lunch!Dont you want my mom to make something for us? asked Jim. Oh no, said,Dan Why give your mom extra workand besides according to my Foods teacher, pizza isa meal in a slice!Annie said, Im not hungryI ate before I came. Dan said, Annie, you never eat.Yes I do, said Annie, I have to watch what I eat or Ill get fat. I cant eat more than 500calories a day so I write down everything I eat to be sure that I dont eat more than Ishould. And I take a vitamin pill every day because I learned that vitamin means VITALFOR LIFE.Bea was all for ordering the pizza. Dan asked Bea how she was able to stay so thinand yet she ate as much as the fellows. Oh, said Bea, I just take a few Ex-Lax or forcemyself to vomit if I eat too much. I love to eat, but like Annie, dont want to be fat.Mark said that he wanted a couple of Twinkies and potato chips in addition to thepizza. Make sure you order several..you know I can eat at least six slices by myself!Well Joanie, are you in favor of the pizza? asked Dan? Oh sure, Joanieanswered. You know how I enjoy foodIll just do some extra running and exercisingtonight.1. Which of the girls had poor or unusual eating habits?2. Explain why you think they were poor or unusual.3. Which of the boys had poor or unusual eating habits?4. Explain why you think they were poor or unusual.:D Simplify the expression below.8(4x+1)18x5 A bag of a certain type of sand weighs 42 pounds and has a volume of 0.5 cubic feet. A sandbox has a volume of 16 cubic feet. Approximately how many pounds of sand will it take to fill the sandbox? place the levels of an ecosystem in the correct order from smallest to largest What is the SI unit of time?A.secondB.minuteC.hourD. day solve equation by completing the square 5n^2-3n-10=15 If a person's goal is to increase his or her goal fitness, which is the most important factor: the specific aerobic exercise a person does or the intensity of the exercise? Defend your respond. what is meant by the resultant force acting on an object? I need help with Spanish When simplified, the expression (x^1/9) (x^2/9).is 6. Which is a possible value of x? what was The difference between the Soviet Union and Great Britain in Europe after the war? Multiple Choice 64 4 = ? A. 15 B. 15 C. 16 D. 16 Find the value of each variable,y =Z=