Just replace 'x' in c(x) by d(x)
(cod) (x) = 4(x^2+5x) - 2 = 4x^2 +20x - 2
Thats it!
Step-by-step explanation:
x = $5
y = $1
4x + 10y = $30
4(5) + 10(1) = 30
$20 + $10 = $30
5x + 5y = $30
5(5) + 5(1) = 30
$25 + $5 = $30
because the bigger the bottom or left number is the smaller the value unless t was like 10/10 that's bigger than them all
You would first make an equation to show their individual price per hour multiplied by hours worked then added together to equal total cost. let X be mechanic 1 and Y be mechanic 2
10x + 5y = 1225
the second equation will use their price per hour added together to equal combined cost per hour
x + y = 180
you would solve by substitution. to do so, isolate either x or y in the second equation. for convenience, I will isolate x
x = 180 - y
plug in (180 - y) for x in the first equation
10(180-y) + 5y = 1225
1800 - 10y + 5y = 1225
-5y = -578
y = 115.6
this means that the second mechanic charges $115.60 per hour
to find the price per hour for the first mechanic, plug in (115.6) for y in the second equation
x + 115.6 = 180
x = 64.4
the first mechanic charges $64.40 an hour
Answer:
Step-by-step explanation:
TO get a fraction from % we need to divide by 100.
622/1 x 1/100= 622/100
Hope this helps :D
