You need common denominators to add or subtract fractions. If you multiple (2/5) by 2 to both the top and bottom, you get (4/10). Now you just subtract the top numbers, or numerators. 4 - 3 = 1. Answer: 1/10.
Answer:
10,000
Step-by-step explanation:
This is because, if you do 10 times 1,000, you would get 10,000
Answer:
x = -7/3y + 8/3
y = -3/7x + 8/7
Step-by-step explanation:
First, set the equations next to each other to find x and y, I'll start with x:
x + 3y + 2x + 4y = 8
Combine like terms
3x + 7y = 8
Subtract both sides by 7y
3x + 7y - 7y = 8 - 7y
3x = 8 - 7y
I'll re-order the equation to make it easier to divide
3x = -7y + 8
Divide both sides by 3
3x / 3 = -7y + 8 /3
x = -7/3y + 8/3
If you need decimals just divide with a calculator
Now to find y:
We already combined like terms so we don't need to do that again...
3x + 7y = 8
Subtract both sides by 3x
3x - 3x + 7y = 8 - 3x
7y = 8 - 3x
I'll reorder the equation once again so the variable comes first
7y = -3x + 8
Divide both sides by 7
7y / 7 = -3x + 8 / 7
y = -3/7x + 8/7
Again, use a calculator to divide completely for decimals.
Answer:
Step-by-step explanation:
Given function.
To find the inverse function 
Step 1:
Replace 
with
in the function.
Step 2:
Interchange with 
in the equation.
Step 3:
Solve for .
We have
Adding 4 to both sides,
Dividing each term by 6 to isolate
Simplifying fractions by dividing the numerator and denominator by their GCF.
Thus the equation of is:
Step 4:
Replace with
(Answer)
Thus, we have the inverse function
