Billy has a gift card with a $150 balance. He buys several video games that cost $ 15 each. After the purchases, his gift card balance is $45. Write an equation to help find out how many video games Billy bought. How many games he bought

(Gift card's original Balance - Balance after purchases)  Answer / cost of game

(150 - 45) = 105.     105/15 = 7

He bought 7 games

Step-by-step explanation:

You do the 150 - the 45 to see how much he had spent.

Divide by the cost and it shows how much he bought

v = (b - n)/p

if v = # of games; b = original balance; n = new balance; p = price per game

v = 7; billy bought 7 games

Step-by-step explanation:

v = (150 - 45)/15 = 105/15= 7

walter needs to make at least 5 more cookies but no more than 40. 5 ≥ x ≥ 40;

step-by-step explanation:

walter has to make a minimum of 20 cookies. he already has 15 cookies made, so he must make 5 more to meet the minimum.

the maximum amount of cookies he can make is 55. he already has 15, so he has to make no more than 40 more cookies to meet the maximum.

you didn't post any answer choices, so its not 100% clear what your teacher is looking for

however, log(15/7) is equivalent to log(15) - log(7)

i'm using the rule log(x/y) = log(x) - log(y)