Faça o estudo do sinal da função y = -4x+16 e indique para que valores de x a função é positiva, negativa ou nula:
a)positiva x>5, negativa x<5 e nula x=5
b)positiva x>-4, negativa x<-4 e nula x=-4
c)positiva x<4, negativa x>4 e nula x=4
d)positiva x<-5, negativa x>-5 e nula x=-5

Consider the expression below. 9 + 4(x + 2) – 3.1 select the term that best describes "3" in the given expression. o a. coefficient variable exponent constant

What is the expression in factored form? -20x^2 - 12x a. 4x(5x+3) b. -4x(5x-3) c. -4(5x+3) d. -4x(5x+3)

Type the correct answer in each box. spell all words correctly. a sequence of transformations maps ∆abc onto ∆a″b″c″. the type of transformation that maps ∆abc onto ∆a′b′c′ is a . when ∆a′b′c′ is reflected across the line x = -2 to form ∆a″b″c″, vertex of ∆a″b″c″ will have the same coordinates as b′.