Answer:
The two numbers are 52 and 12.
Step-by-step explanation:
x+y=64
x=16+3y
Now, substitute the second equation into the first one.
16+3y+y=64
16+4y=64
4y=48
y=12
Substitute 12 into one of the equations in order to find x.
x=16+3(12)
x=16+36
x=52
Answer:
The formula for calculating the percent change in a value between two points in time is:
p
=
N
−
O
O
⋅
100
Where:
p
is the percent change - what we are solving for in this problem.
N
is the New Value - 5 in this problem.
O
is the Old Value - 4 in this problem.
Substituting and solving for
p
gives:
p
=
5
−
4
4
⋅
100
p
=
1
4
⋅
100
p
=
100
4
p
=
25
There was a 25% increase from 4 to 5.
Step-by-step explanation:
Let's represent Ben's current age by x and his age in 16 years, x+16.If in 16 years, his age will be 3 times his age now, the equation is x+16=3x
x+16=3x
x-x+16=3x-x
16=2x
16/2=2x/2
8=x
Therefore Ben is 8 years old.
