Joint Variation Word Problems

The equation for a Joint Variation is represented as:

• y = kx

• y = k/x

• y = kxz

• y = kx/z

If y varies jointly with the product of x and z, and y = 105 when x = 5 and z = 7, find y when x = 9 and z = 10.

• 270

• 180

• 360

• 255

If y varies jointly with the product of x and z, and y = 1000 when x = 10 and z = 20, find y when x = 8 and z = 10.

• 100

• 200

• 300

• 400

If y varies jointly with the product of x and z, and y = 500 when x = 10 and z = 50, find y when x = 8 and z = 10.

• 10

• 20

• 30

• 80

If y varies jointly with the product of x and z, and y = 320 when x = 10 and z = 4, find y when x = 8 and z = 6.

• 196

• 258

• 326

• 384

If y varies jointly with the product of x and z, and y = 90 when x = 10 and z = 18, find y when x = 14 and z = 6.

• 24

• 42

• 56

• 84

If y varies jointly with the product of x and z, and y = 90 when x = 10 and z = 6, find y when x = 14 and z =16.

• 248

• 336

• 364

• 442

If y varies jointly with the product of x and z, and y = 24 when x = 4 and z = 24, find y when x = 24 and z =16.

• 48

• 86

• 96

• 142

If y varies jointly with the product of x and z, and y = 1920 when x = 4 and z = 24, find y when x = 24 and z =3.

• 1240

• 1340

• 1440

• 1540

If y varies jointly with the product of x and z, and y = 560 when x = 4 and z = 28, find y when x = 23 and z =3.

• 345

• 365

• 385

• 405