Answer:
Step-by-step explanation:
What we have is a general equation that says this in words:
Laura's hours + Doug's hours = 250 total hours
Since we don't know either person's number of hours, AND since we can only have 1 unknown in a single equation, we need to write Laura's hours in terms of Doug's, or Doug's hours in terms of Laura's. We are told that Doug spent Laura's hours plus another 40 in the lab, so let's call Laura's hours "x". That makes Doug's hours "x + 40". Now we can write our general equation in terms of x:
x + x + 40 = 250 and
2x = 210 so
x = 105
Since Laura is x, she worked 105 hours in the lab and Doug worked 40 hours beyond what Laura worked. Doug worked 145. As long as those 2 numbers add up to 250, we did the job correctly. 105 + 145 = 250? I believe it does!!
Answer:
The item costs $900 after the 90% off.
Step-by-step explanation:
After the 90% off discount, the item costs (100% - 90%) the cost of the original price.
Hence, 
Hope this helped!
Answer:
Part A: T(x) = $49.99x + $499.00
Part B: $748.95
Part C: T(x) = $49.99x + $24.99y + $499.00
Part D: $773.93
Step-by-step explanation:
Part A:
Let x represent the amount of games bought. Let T(x) represent total cost.
T(x) = $49.99x + $499.00
Part B:
T(x) = $49.99(5) + $499.00
T(x) = $249.95 + $499.00
T(x) = $748.95
Part C:
Let y represent the amount of controllers bought.
T(x) = $49.99x + $24.99y + $499.00
Part D:
T(x) = $49.99(4) + $24.99(3) + $499.00
T(x) = $199.96 + $74.97 + $499.00
T(x) = $773.93
The correct answer is 60 raisins. To get this answer you will write a proportion of M & Ms to raisins and create and equivalent ratio using the number 36.
After you have the proportion set up, you will use cross products to solve for the number of raisins.
You can also use equivalent ratios to find the number of raisins.
Both of these strategies are shown in the attached picture.
Answer:
219.6 days
Step-by-step explanation:
