Answer:
In 7 years
Step-by-step explanation:
Let
n ----> the number of years
x -----> Kate's age
y ----> Victor's age
we know that
we have
Victor's age is 5
substitute the given values
Solve for n
<u><em>Verify</em></u>
In 7 years
Kate's age is 17+7=24
Victor's age is 5+7=12
24=2(12)
so
Kate is twice as old as Victor
Answer:
Step-by-step explanation:
The constant of proportionality is y/x=k. In this case it is 30/5=48/8...6 k=6
The equation is
y=6x where y=number of wheels and x=number of buses
Well, 15% of 60 is 9 so now you have to create a model :)
y = x^2 + 2x...eqn 1
y = 3x + 20...eqn 2
subst for y in eqn 1...
=> x^2 +2x = 3x +20
=> x^2 - x - 20 =0
=> (x-5) (x+4) =0
=> x = 5 or -4
for x =5, y = 35 (sub for x in eqn 1 or 2)
for x = -4, y = 8 (sub for x in eqn 1 or 2)
