one T-shirt is sold for every 5 people who att6a concert what is the ratio of people to T-shirts sold is how much to how much

The ratio is 5:1 or also 5/1

Step-by-step explanation:

Ratios

Ratios are usually expressed as a:b or as a fraction a/b. Ratios are used to measure the relative times a is in b. For example, a ratio of 7:3 means there are 7 of something for each 3 of other thing.

We are told one T-shirt is sold for every 5 people wh attends a concert and it's required to find the ratio of people (5) to T-shirts sold (1).

The ratio is 5:1 or also 5/1

The equation is y = $72.99 + $28.45(x - 1), where y is the monthly charge and x is the month in which it is calculated.

Step-by-step explanation:

Step 1; First we need to establish a relation between the difference in costs. For the first month it cost $72.99, during the second month, it costs $101.44 and in the third month, it costs $129.89. Difference in rates

Second months rate - First months rate = $101.44 - $72.99 = $28.45

Third months rate - Second months rate = $129.89 - $101.44 = $28.45.

So for every consecutive month, the charges increase by $28.45

Step 2; Now we develop an equation,

y = $72.99 + $28.45(x - 1), where y is the charge that month and x is the month in which it is calculated.

For x = 1, y = $72.99 + $28.45(1 - 1) = $72.99 + $28.45(0) = $72.99,

For x = 2, y = $72.99 + $28.45(x - 1) = $72.99 + $28.45(2 - 1) = $101.44,

For x = 3, y = $72.99 + $28.45(3 - 1) = $72.99 + $28.45(3-1) = $129.89.

So this is the equation to calculate the cost y the mobile provider charges in month x.