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
aliina [53]
3 years ago
5

If z varies jointly with x and y, x = 2 and y = 2, z = 7. Find z when x = 4 and y = 8.

Mathematics
1 answer:
Wittaler [7]3 years ago
7 0

Answer:

56

Step-by-step explanation:

z varies jointly with x and y:

z = kxy

When x = 2 and y = 2, z = 7.

7 = k(2)(2)

k = 7/4

z = 7/4 xy

When x = 4 and y = 8:

z = 7/4 (4)(8)

z = 56

You might be interested in
Find all real zeros of t<br>f(x)=x-14x² + 47x-18​
BabaBlast [244]

Answer:

x=3/7 and x= 3

Step-by-step explanation:

First simplify:

-14 x^2 +48x -18

divide everything by -2

-2(7 x^2 -24x +9) (Multiply the leading coefficient 7 by the constant 9)

-2 (x^2 -24x +63)

-2 [(x-3)(x-21)] Now divide the 7 that you multiplied earlier from 3 and 21

-2 [(x-3/7)(x-21/7)]

-2 [(7x-3)(x-3)]

Hence, the zeroes are 3/7 and 3

Hope this helps!

If you think I helped, Please mark brainliest! Would really appreciate!

4 0
2 years ago
1.) At a restaurant, your bill has a food total of $33.50. Find the amount of a 16% tip on the food total.
lukranit [14]
$5.36 hope this helps
8 0
2 years ago
Can someone please help me with this?
mr_godi [17]
G = 2 inches


The first shape is 6 and 12. The two shapes are similar to each other, so the other shape must be 1 and 2. 6 divided by 6 is 1 so 12 divided by 6 is 2.
3 0
3 years ago
Read 2 more answers
Help? Find the lateral area for the prism.
Gnoma [55]
I think the answer will be 17 square that what my friend said.
4 0
3 years ago
Read 2 more answers
PLS ASAP ANSWER ONE MATH QUESTION CORRECTLY
Shtirlitz [24]
Hey there!
To find the volume, we simply find the separate volumes of all three cubes and add them. The formula for volume in a cube is s^3 with s being one side. Therefore since all the sides are 6, the volume of one cube is 216 units cubed.
Now, we multiply that by three to get the total volume of the three cubes, to get 648 cubic units- so A.
Hope this helps!
3 0
3 years ago
Other questions:
  • The organic garden at a restaurant is rectangular in shape and has a perimeter of 84 feet. If the length lof the garden is 24 fe
    11·1 answer
  • List the next three terms in the following sequence: 1, 2, 4, 7, 11, 16,...
    12·1 answer
  • Solve y = 4x + 8x for x​
    9·2 answers
  • Which point is an x-intercept of the quadratic function f(x) = (x + 6) X – 3)?
    13·1 answer
  • Which of the following shows two points on the line f(x)=x-7
    7·1 answer
  • Plz help I will give brainliest
    8·1 answer
  • 1. Solve the equation. (1 point)<br> 5x-1= 14
    11·1 answer
  • Is it possible to construct Triangle ABC with angles 40, 60 and 90 degrees?
    5·1 answer
  • What is the expanded form of this number?
    14·2 answers
  • I dont know how to do this, please help​
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!