Represent the following sentence as an algebraic expression, where “a number” is the letter x. The product of 2 and a number.

$4

step-by-step explanation:

$30×5=$150

$150 minus $130=$20

$20÷5=$4.

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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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the first one, all those points on the line just make a strait line.