The length of hours Gilbert drove is 7.5 hours.
The length of hours Brian drove is 4.1 hours.
<u>Step-by-step explanation</u>:
- Gilbert averaged = 45 miles per hour
- Brain averaged = 65 miles per hour
- Total hours = 11.6 hours
- Total distance = 604 miles
Let 'x' be the hours Gilbert drove.
Let 'y' be the hours Brian drove.
x+y = 11.6  -----(1)
45x+65y = 604 -----(2)
Multiply (1) by 45 and subtract (2) from (1)
  45x+45y = 522
-(<u>45x+65y = 604</u>)
  <u>      -20y = -82 </u>
y = 82/20
y = 4.1 hours
The length of hours Brian drove = 4.1 hours
Substitute y=4.1 in (1)
x+4.1 = 11.6
x = 7.5 hours
The length of hours Gilbert drove = 7.5 hours
 
        
             
        
        
        
Answer:
11h + 15s = E
Step-by-step explanation:
E = total earnings
s = the amount of skis sold
h = how many hours she works
 
        
             
        
        
        
Answer:
no
Step-by-step explanation:
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Answer:
x=1.875   y=-0.875
Step-by-step explanation:
10x-3y=3                     10x-3y=3
3(2x+y)=(9)3                +<u>6x+3y=27</u>
                                1/16(16x)=(30)1/16  = x=1.875
    10x-3y=3                  10x-3y=3
  -5(2x+y)=(9)-5           -<u>10x-5y=4  </u>                         
                                     1/-8(-8y)=(7)1/-8 = y=-0.875