Answer:
11 years old
Step-by-step explanation:
If four brothers have the average age 6, then the sum of their ages is
years.
Let x years be the age of sister. If four brothers and their sister have the average age 7, then
Multiply this equation by 5:
The sister is 11 years old.
Answer:
-1/1
Step-by-step explanation:
=64/-8
over
36-30+2
= -8
over
8
= -1
over
1
Answer: x=−1+√5ı,−1−√5ı
24/3 equals 8. SOOOOO 1/3 of 24 is 8. So 8 Red and 16 Blue
Answer:
first aircraft=189
second aircraft=130
third aircraft=88
Step-by-step explanation:
1st = x+59
2nd = x
3rd= x-42
x + 59 + x + x - 42 = 407
3x + 59- 42 = 407
3x + 17 = 407
3x = 407 - 17
x=390÷3
=130
1st=130+59=189
2nd=130
3rd=130-42=88
