Answer:
8
Step-by-step explanation:
Substitute the equation and values into the average rate of change formula.
280÷20=14 is that what ur asking?
a+b=350 => a=350 - b
3a + 5b = 1450
3(350-b)+b=1450
1050-3b+5b=1450
2b=400
b=200
a=150
Answer:

Step-by-step explanation:
The missing parameters are:
--- Cost of marble countertops
--- Cost of retail markup
Required
The cost of marked up price
This implies that we calculate m(c(a))
We have:

can be written as:

Substitute:


Hence, the cost of marked up price is: 
Answer:
8x-2y
Step-by-step explanation:
3x4y+5x+2y
Simplify
1 Combine like terms
3x4y+5x+2y
8x-4y+2y
2 Combine like terms
8x-4y+2y
8x-2y
Solution
8x-2y
Hope this helps!
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