Tissues are sold in packs and boxes A pack holds 20 tissues and a box holds 120 tissues Sia buys P packs of tissues and B boxes of tissues She buys a total of T tissues

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Tissues are sold in packs and boxes A pack holds 20 tissues and a box holds 120 tissues. Sia buys P packs of tissues and B boxes of tissues. She buys a total of T tissues Write down a formula for T in terms of P and B.

Let P represent number of packs of tissues and B represent number of boxes of tissues.

Since each pack holds 20 tissues, so tissues in P packs would be .

Since each box holds 120 tissues, so tissues in B boxes would be .

The total number of tissues would be sum of tissues in P packs and B boxes that is .

We are told that Sia bought a total of T tissues, so we can equate T with total number of tissues as:

Therefore, our required formula would be .

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step-by-step explanation:

homozygous. one is homozygous, while two is heterozygous.