9x - 2 = 67
67 + 2 = 69
69 × 9 = 621
621 = x
Scientific notation:
8.41 x 10^7
expanded form:
84100000
Answer:
there is no question there for i can not answer your question
Answer:
10
Step-by-step explanation:
x = Edith's age = 20 years
y = Ronald's age
x = 20 = y/4
y = 20×4 = 80 years
in z years we have
(x + z) = (y + z)/3
(20 + z) = (80 + z)/3
3(20 + z) = 80 + z
60 + 3z = 80 + z
60 + 2z = 80
2z = 20
z = 10
in 10 years Edith's age will be 1/3 of Ronald's age.
then Edith will be 30, and Ronald will be 90.
30 = 90/3
correct.
Step-by-step explanation:
(3×6) + (2×6)
= 18 + 12
= 30 in²
