Question

9: If 19 erasers cost $3, what is the equation that can determine the cost of 45 erasers

Answer 1

Answer:

$y=mx$

Step-by-step explanation:

$y=mx$

where, y is the total cost of the erasers,

m is the numbers of erasers,

x is the cost of each erasers.

Given:- $m=19, y=3$

by putting these value in the above equation,

i.e. $y=mx$

we get,

$3=19x$

$x=\frac{3}{19}$

$x=0.157$

Now for 45 erasers substitute the value of $x=0.157$

so, we get $y=45\times 0.157$

$y=7.065$

cost of 45 erasers are $7.065