In how many ways can 7 different posters be arranged in a rrow under permutation

i don't know

Step-by-step explanation:

sorry hahahahayahahahhw

d) 30 units^2

area of rectangle = l × b

we know,

length = 10 unit

breadth = 3 unit

applying the formula,

= l × b

= 10 × 3

= 30 unit^2

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for this case we must apply distributive property to the following expression:

the distributive property states that:

then, when applying the property we have to multiply the -2 for each term within the parenthesis: