Let's say Mary's brother's age is x and Mary's age is y
(1) x = 3y - 5
(2) x + y = 39
Now if we substitute equation (1) into equation (2) we get:
3y - 5 + y = 39
4y = 44
y = 11
Therefor Mary is 11 years old
Answer:
8.84×10⁻
Step-by-step explanation:
To write a number in standard form we need to write down a number between 1 and 10, then × 10(to the power of a number). Therefore, the standard form of 0.884 is ¹.8.84×10⁻.
Have a great day
You can conclude that AE = DE because the triangles are about equal
Answer:
Lol.
Step-by-step explanation:
It's 0.125, it's not endless either