Hello,
let's assume j the john's age, m the mary's age.
<span>"John is twice as old as mary"==>j=2*m
</span>
<span>"the sum of their ages is 21" ==>j+m=21
==>2*m+m=21
==>3m=21
==>m=7
and j=21-7=14
</span>
Answer:
robert is 12 years old
Step-by-step explanation:
robert's age=x
40=3x+4
that's the equation
40=3x+4
=36=3x
x=12
Answer:
A (8,0)
B (8,8)
C (6,8)
D (6,0)
Step-by-step explanation:
Im pretty sure your can just flip the negative signs for "x" cause your flipping it across the y axis which changes the sign.
Answer:
Can't tell
Step-by-step explanation:
Hear me out. There is no graph hear, so I can't answer. Just letting you know
Answer:
Step-by-step explanation:
22+x = 34
34-22 = x