What is the sum of the third multiple of four and the third multiple of five

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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pls mark as brainliest

i believe it is c.y = 9x

rise over run. 9 units up over 1 unit right or 9/1