I answer this question before this is the solution just change the total of $2750:
Two mechanics worked on a car, The first mechanic worked for 20 hours and the second mechanic worked for 5 hours together they charged a total of $1150.
Let's make,
mechanic #1's rate = x
mechanic #2's rate = y
* Their rate is dollars per hour ($/hr)
mechanic #1 worked for 20 hours (hr × $/hr = $)
20x = money earned by mech#1
and mechanic #2 worked for 5 hours
5y = money earned by mech#2
together they charged a total of $1150. So the amount of money earned by both mechanics.
20x + 5y = 1150
the sum of the two rates was $95 per hour.
x + y = 95
which means
x = 95 - y
plug (95 - y) in for "x" in the other equation to get everything in terms of one variable.
20(95 - y) + 5y = 1150
solve for y
1900 - 20y + 5y = 1150
1900 - 15y = 1150
-15y = 1150 - 1900
-15y = -750
y = -750/-15
y = 50 $/hr
Now use this to solve for x
x + y = 95
x + 50 = 95
x = 95 - 50
x = 45 $/hr
mech#1 charged 45$/hr
mech #2 charged 50$/hr
Answer: option D
Step-by-step explanation:
step 1: take 7-3(both have the variable x) and subtract it.
-a- -b= subtract then write the greater no.s sign
+a- +b= if the 1rst number is greater than the second, subtract and give
or make it a positive integer. if the 1rst no. is smaller than the second,
subtract then write the greater number's sign.
step 2: As 2-2 is 0, 2y-2y is 0
step 3: and the sum of the both: is 17-14= 13
Answer:
C
Step-by-step explanation:
put x^5=u
The evaluated answer would be 418