Answer:
The first mechanic worked for 20 hours and the second mechanic worked for 5 hours
Step-by-step explanation:
Let f be the number of working hours of first mechanic
Let s be the number of working hours of second mechanic
Given that they both worked for a combined total of 25 hours
⇒f + s = 25 → equation 1
First mechanic charged $95 per hour and second mechanic charged $90 per hour and they both together charged $2350
⇒95f + 90s = 2350 → equation 2
Using equation 1 in equation 2:
95f + 90(25-f) = 2350
⇒95f + 2250 - 90f = 2350
⇒5f = 100
or f = 20 hours
⇒s = 25 - f ⇒ s = 5 hours
<u>The first mechanic worked for 20 hours and the second mechanic worked for 5 hours</u>
Solve for x
Divide both sides by -4
X= - 10/4
Now simplify by dividing top and bottom by 2
X= -5/2 or - 2 1/2
Answer:
Step-by-step explanation:
Primary producers — including bacteria, phytoplankton, and algae — form the lowest trophic level, the base of the aquatic food web. ...
Some zooplankton including copepods, rotifers, larval stages of some fish and invertebrates are grazers and drift through the water grazing on phytoplankton.
Hi I’m just testing this out, sorry
Answer:
No only variable on both sides have no solution
Step-by-step explanation:
Then you can get,
for example x=x
or,
y=y