Mario invested $475 in $45 and $25 stock shares. the number of $25 shares was 5 less than 3 times the number of $45 shares. how many of each type of share did he buy?

Explanation:

Let Number of $45 shares be x

Let number of $ 25 shares be 3x-25

According to question,

So,

The number of $25 shares is 10 and the number of $45 shares is 5

Step-by-step explanation:

Let x be the number of shares of $25 and y be the number of shares of $45

So, total cost of $25 shares = $25x

So, total cost of $45 shares = $45y

Since we are given that The number of $25 shares was 5 less than 3 times the number of $45 shares.

Equation becomes :  --1

Mario invested $475 in $45 and $25 stock shares.

Equation becomes :  --2

Substitute the value of x from 1 in 2

Substitute the value of y in 1

So, the number of $25 shares is 10 and the number of $45 shares is 5

$54.99

step-by-step explanation:

$54.99 includes 500 min. if she does not exceed 500 min then her bill is $54.99