The current value of a baseball card is 60 times its original value v(in dollars). The baseball card is worth $15. Write and solve an equation to find the original value of the baseball card.

Step-by-step explanation:

It these triangles are similar, then the sides of the triangles are in proportion:

     cross multiply

   use distributive property

      subtract 10y from both sides

          divide both sides by 5

           cross multiply

          divide both sides by 8

36 is 90 percent of 40.

Given that we need to find that 36 is 90% of what number,

Here using the concept of Percentage,

Percentage refers to a portion or fraction of a whole expressed as a number out of 100. It is a way of representing parts of a whole in terms of hundredths. The symbol "%" is used to denote a percentage.

To calculate a percentage, you can use the following formula:

Percentage = (Part / Whole) x 100

Where "Part" refers to the portion you are considering, and "Whole" represents the total or the whole amount.

To find the number that 36 is 90% of, you can use the following formula:

x = (36 / 0.9)

Let's calculate it:

x = 36 / 0.9

x = 40

Therefore, 36 is 90 percent of 40.

Learn more about Percentage click;

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