Arectangle has a perimeter of 60 cm let x represent the length of one side of the rectangle which of the following functions models the area a(x) of the rectangle?

a. a(x) = x^2 + 30x
b. a(x) = 30x - x^2
c. a(x) = x^2 + 60x
d. a(x) = 60x - x^2

B.

Step-by-step explanation:

P(x)= 2( x+y)  //Rectangle perimeter              =>   A(x)= xy         //Rectangle area

60 = 2(x+y)                                                                   =x(30-x)  //Substituting y            

60/2= [2(x+y)]/2                                                            =30x - x²

  30= x+y

the perimeter is increased by a factor of 2

the answer for this question is : 360°

step-by-step explanation:

we have been given a triangle   we need to tell which one of these is a triangle below to map onto itself.

360° rotation is the complete rotation which eventually leads to the same figure which is given.

the correct will be, that is 360° that will cause the triangle below to map onto itself.