Answer:
-5/6x + 7/2 = y
Step-by-step explanation:
f(x) = (21 -6x) /5
y = 1/5 (21 -6x)
To find the inverse exchange x and y
x = 1/5 (21-6y)
Solve for y
Multiply each side by 5
5x = 5* 1/5 (21-6y)
5x = (21-6y)
Subtract 21 from each side
5x -21= (21-21-6y)
5x-21 = -6y
Divide each side by -6
5/-6x-21/-6 = -6/-6y
-5/6x + 7/2 = y
12/15= 4/5 if we divide by the common factor 3 and 8/10 =4/5 because they have a common factor 2 so by dividing we get 4/5. so they have the same value
Answer:
Step-by-step explanation:
If x = a, then the value of the indicated function is y = (1/5)^a.
1
An alternative way of writing this would be y = -----------
5^a
Answer:
-2
Step-by-step explanation:
The equation is -12/c=6
by solving for c you get,
-12/c=6
Then multiply both sides by the LCM c to get, -12=6c
Divide both sides by 6 to get,
-12/6=6c/6
-2=c
Verification:
-12/-2=6 since when a negative number divides a negative number the answer is a positive value
<h3>
Answer:</h3>
After two hours the two plumbers will charge the same amount
<h3>
Step-by-step explanation:</h3>
Set up your equations
<u>Plumber 1</u>:
y = 25x + 100
<u>Plumber 2</u>:
y = 50x + 50
Set the two equal to each other and solve
25x + 100 = 50x + 50
-50 -50
25x + 50 = 50x
-25x -25x
50 = 25x
50/25 = 25x/25 <- Divide both sides by 25
x = 2
After two hours the two plumbers will charge the same amount