She worked as a carpenter for 12 hours and as a blacksmith for 18 hours.
Assuming you mean she earned $20 as a carpenter and $25 as a blacksmith per hour, with a total of 30 hours for $690,
let c represent carpenter hours and b for blacksmith hours.
20c + 25b = 690
c + b = 30
Subtract b from each side so that c = 30 - b
Plug this value into the first equation
20(30 - b) + 25b = 690
600 - 20b + 25b = 690
600 + 5b = 690
5b = 90
b = 18
To find c, plug this value of b into the other equation
c + 18 = 30
c = 12
If this is a proportion, then the answer is 16.
3:12, 4:16
3*16=12*4
Answer:
Please refer to the attachment
Step-by-step explanation:
g(f(x)) = f(x) substituted in g(x)'s function.
g(3x^2 - x - 8) = 3x^2 - x - 8 + 5 = 3x^2 - x - 3.
Answer:
D
Step-by-step explanation:
To find the inverse. Switch the x and y and re solve for y
multiply both sides by 6 and subtract both sides by 54
