How do i get full marks? Have to write is sept by step that's what I did but only got 2 marks.

x = 5 cm

Area = 56 cm²

Step-by-step explanation:

The perimeter of the triangle is given as : 21 cm

The two sides given are : 6 cm and 10 cm. The other side has a length of ;

21 - {6+10} = 21 - 16 = 5 cm

This means the value of x is 5 cm

The rectangle will now have its measurements as ;

Length = 7 cm

Width = x + 3 = 5+3 = 8 cm

The area of the rectangle will be :

A = l * w = 7 * 8 = 56 cm

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step-by-step explanation:

guess at question:

a vertical line intersects the graph of g(x,y) = 0 at two points. what conclusion follows about the function f(x) implicitly defined by g(x,f(x)) = 0?

the domain of f(x) cannot include the x coordinate of any such vertical line.

informally, f(x) is not a function, and

g(x,y)=0 cannot be solved for y uniquely.

the relation r = {(x,y) such that g(x,y) = 0} is a function if

for all (a,b) ∊ r and (c,d) ∊ r, a=c implies b=d.

step-by-step explanation: