Question

Two quantities x and y are connected by the formula y = 7 - 9x
(a) find the value of y when x = 0
(b) find the value of x when y = 0

Answer 1

Answer:

x = -7/-9 and y = 7

Step-by-step explanation:

whn x=0,

y=7-9x

=7-0

=7

when y=0,

y=7-9x

-9x+7=0

-9x= -7

x = -7/-9

Answer 2

The value of y when x = 0 and value of x when y = 0 are 7 and 7/9 respectively.

Given:-

Equation = y = 7 - 9x

To Find:-

The value of y when x = 0 and value of x when y = 0.

Solution:-

We can easily find out the value of y when x = 0 and value of x when y = 0 by using these simple steps.

As

Equation = y = 7 - 9x

Now, Case 1,

$y = 7 - 9x$

putting x = 0

$y = 7 - 9 \times 0$

$y = 7 - 0$

$y = 7$

Case 2,

$y = 7 - 9x$

putting y = 0

$0 =7 - 9x$

$9x = 7$

$x = \frac{7}{9}$

Hence, The value of y when x = 0 and value of x when y = 0 are 7 and 7/9 respectively.

#SPJ2