Answered already okay. GFY.
Answer:
the answer is C hope this helps you
9514 1404 393
Answer:

Step-by-step explanation:
The slope of a line is the same everywhere, so an equation can be written making use of that fact.

Cross-multiplying gives ...
2(y -5) = x -2
2y -10 = x -2 . . . eliminate parentheses
2y = x +8 . . . . . . . add 10; next, divide by 2

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These equations match choices B and D.
Answer:
4
Step-by-step explanation:
1. if the mass of coffee worth $10 is 'x', then its worth is 10x, and the worth of the mixture is 5(x+20);
2. using the previous item it is possible to write the next equation:
5(x+20)=4*20+10*x; ⇒ x=4.
3. the required mass is 4 pounds.