If the sum of a number and six is doubled, the result is five less than the number. find the number

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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i think it will be zero as slope has a formula of difference between initial and final distance divided by itz time interval