Question

Q1. Find the value of x and y in the following table, if p and q vary directly.
p 8 4 y
q 20 X 40​

Answer 1

Step-by-step explanation:

Answer

The statement " x varies directly as y ," means that when y increases, x increases by the same factor. In other words, y and x always have the same ratio that is:

x=ky   

where k is the constant of variation.

Here, it is given that p varies as q if p=5and q=10, therefore,

p=kq⇒5=k×10⇒5=10k⇒k=105=21 

Thus, the general equation is p=21q.

Since p=20, therefore,

p=21q⇒20=21q⇒q=20×2=40

Hence, q=40 when p=20.

THANK YOU

Answer 2

Answer:

Step-by-step explanation:

m=400

n=240

p=300

q=6