Questão 5: Rosinha pagou R$ 67,20 por uma blusa que estava sendo vendida com desconto de 16%. Quando suas amigas souberam, correram para a loja e tiveram a triste notícia que o desconto já havia acabado. O preço encontrado pelas amigas de Rosinha foi

a) R$ 70,00
b) R$ 75,00.
c) R$ 80,00
d) R$ 85,00

mark branliest

step-by-step explanation:

.6 is 1/2 of 12

the answer is actually d. i just took the test

d) 48

step-by-step explanation:

16,32,48,64,80,96,112,128,144,160,176,192,208,224,240,256,272,288,304,320,336

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!