1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
svlad2 [7]
3 years ago
8

If y varies jointly with x and z and y=40 when x=10 and z=9 find z when x =55 and y=105

Mathematics
1 answer:
Eduardwww [97]3 years ago
4 0

Answer:

  z = 189/44

Step-by-step explanation:

The "varies jointly" relationship can be expressed by ...

  y = kxz

We can find k from the given values.

  40 = k(10)(9)

  40/90 = k = 4/9 . . . divide by the coefficient of k

Now we want to find z for given values of x and y. That can be found from ...

  y = (4/9)xz

  9y/(4x) = z . . . . . multiply by 9/(4x)

Filling in the new numbers, we have ...

  z = 9·105/(4·55)

  z = 4 13/44 = 189/44 ≈ 4.2954...(repeating 54)

You might be interested in
Need some help on this question
Mnenie [13.5K]

Answer:

<h2>9.</h2>

We know that

6 × 3 = 2 × x

18 = 2x

x = 9

7 0
3 years ago
4/18 is closest to: 1/2 or 1 whole
Anika [276]

Answer:

1/2, since 1 whole is 18/18 and 1/2 is equal to 9/18

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
P is a rectangle with a length 40 cm and width x cm
romanna [79]
We know that

the length of Q is 25% more than the length of p
so
length Q=1.25*40--------> 50 cm
the area of Q is 10% less than the area of p
Area Q=50*y
Area P=40*x
so
50*y=0.90*[40*x]---------> 50*y=36*x-------> x/y=50/36---> 25/18

the answer 
the ratio x:y is 25:18
4 0
3 years ago
Add these mixed numbers -Thanks!
alina1380 [7]
1. 6 1/2
2.4 1/2
3. 9 1/3
4. 9 1/2
5. 9 6/8
6. 6 1/2
(For the adding ones ) I also simplified them.
7 0
3 years ago
Match the expression to its value.​
brilliants [131]

Answer:

1       a

2      b

3      c

4      d

Step-by-step explanation:

1b

2d

3c

4a

6 0
2 years ago
Other questions:
  • James currently has $215 in a savings account. Every month, he deposits an additional $45 into his account. James had to replace
    6·1 answer
  • Which statement represents the simplified form of the given equation and correctly describes the solution? 1/2(4x + 2) = 2(x + 1
    14·1 answer
  • 614 divided by 31 round it
    5·2 answers
  • A baseball team won 40% of its first 30 games. The team then won 65% of its next 60 games. Approximately what percent of the gam
    6·1 answer
  • Find the missing angle measurments geometry
    5·1 answer
  • Mrs. Via needs to buy
    9·1 answer
  • HELP PLEASE <br> classify the triangle
    7·2 answers
  • You fitted a regression model on the height of a particular pine tree, after 20 years of growth, as a function of the elevation
    13·1 answer
  • Find the perimeter and the area of the figure.
    10·2 answers
  • Mr Tong had some money. After giving $1300 to each 5 of his children, he had $450 left. How much money did he have at first
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!