EXERCICIOS 1) Identifique se ha proporcionalidade entre as razoes
a) 2/7 e 3/5 b) 100/2 e 200/4 c)50/5 e 40/4 d) 450/30 e 60/4
185
2 OVOS
e) 10/3 e 15/3 f) 18/3 e 23/4
d) 5/4 e 12/4 e) 81/9 e 2713
2) Resolver a atividade 3 (apostila do aluno Aprender sempre 7º ano)
3) Resolver a atividade 4 - item 2 (somente o item 2) (apostila do aluno Aprender sempre 7 ano)

29 is the correct answer

step-by-step explanation:

i dont know if you cant find a way its best to actually add all of them start from 105 tho

step-by-step explanation:

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

r and t.

both are 64 degrees.