Answer: 2538
Step-by-step explanation:
12*21/2
126
126/1*41/2
2538
Answer:
where is the figure?
Step-by-step explanation:
Answer:
B
Step-by-step explanation:
Because yes
Answer:
one real solution
Step-by-step explanation:
square root of 0 is 0
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
