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
Answer:
Step-by-step explanation:
-1+(-2)
3 11/30
steps to this: here you have to Rewrite our equation with parts separated
=1+15+2+16
Solving the whole number parts
1+2=3
Solving the fraction parts
15+16=?
Find the LCD of 1/5 and 1/6 and rewrite to solve with the equivalent fractions.
LCD = 30
630+530=1130
Combining the whole and fraction parts
3+1130=31130
Solution by Formulas
First:
Convert any mixed numbers to fractions.
Then your initial equation becomes:
65+136
Applying the fractions formula for addition,
=(6×6)+(13×5)5×6
=36+6530
=10130
Simplifying 101/30, the answer is
=31130
Answer:
2(x+5)
Step-by-step explanation:
Yes, it is a true statement, since the absolute value of any negative number is its opposite -- the positive version of the number.
