Answer:
31 and a quarter week (31.25)
Step-by-step explanation:
First find the rate. There is no need to do cross multiplication because it's already a unit rate (per 1 week).
2. Divide
156.25 / 5 = 31.25
3. Answer
31.25 weeks
f(x) - g(x)
=> (3x² + x - 3) - (x² - 5x + 1)
=> 3x² + x - 3 - x² + 5x - 1
=> 3x² - x² + x + 5x - 3 - 1
=> 2x² + 6x - 4
Answer:
30
Step-by-step explanation:
So we begin by assigning variables to each side with:
DE = x
EF = y
DF = z
Now we start listing a system of equations from what is given:
x+y+z=81
x=2y
x-4=z
Once we solve that with substitution, we get the result of:
x=34
y=17
z=30.
Since z is the length of DF, the length of DF is 30.
I hope this helped! :D
The answer to the question is 7.
