Question

The table is an example of joint variation. What is the missing value if the length is 5 meters?

Answer 1

Answer:

7

Step-by-step explanation:

Formula of joint variation : $z = kxy$

To Calculate k

Width(x)= 7

Height(y) = 12

Volume(z) = 420

Substitute the values in the formula

$420 = k(7)(12)$

$\frac{420}{7 \times 12} = k$

$5= k$

Now , to find the missing height

Substitute width = x = 15

Height = ?

Volume = z = 525

Substitute the values in the formula :

$525 = 5(15)y$

$\frac{525}{5 \times 15}= y$

$7= y$

So, the  missing value is 7 .

Answer 2

7 * 12 * 5 = 420
10 * 5 * 5 = 250
2 * 18 * 5 = 180
15 * 7 * 5 = 525

Answer
missing = 7