Here is a problem from my math homework. Could someone explain how to do it for me? I don't get how the (1,c) is related to it.
If x+ 3y < 7 and (1,c) is a solution to the inequality, then which of the following is a possible value for c?
a) 1 b) 2 c) 3 d) 5 e) 6
If x+ 3y < 7 and (1,c) is a solution to the inequality, then which of the following is a possible value for c?
a) 1 b) 2 c) 3 d) 5 e) 6
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Rowan,
The (1,c) is related to it because it represents coordinates on a graph with x and y coordinates...the "1" is the "x" and the "c" is the "y" in an (x,y) coordinate.
To figure out how to solve this, just start by substituting the "1" for "x" in the left side of the inequality...["1"+3y]<7.
Now, you can try each of the answers for the "c" or "y" in the inequality and see what makes it true. For example, ["1"+ (3 * 6) ]< 7...is that true? [1+18]<7? Definitely not true, so answer e cannot be the correct one.
Try answer d...[1 + (3 * 5)] < 7....is that true? 16<7?
Hope this helps...good luck.
The (1,c) is related to it because it represents coordinates on a graph with x and y coordinates...the "1" is the "x" and the "c" is the "y" in an (x,y) coordinate.
To figure out how to solve this, just start by substituting the "1" for "x" in the left side of the inequality...["1"+3y]<7.
Now, you can try each of the answers for the "c" or "y" in the inequality and see what makes it true. For example, ["1"+ (3 * 6) ]< 7...is that true? [1+18]<7? Definitely not true, so answer e cannot be the correct one.
Try answer d...[1 + (3 * 5)] < 7....is that true? 16<7?
Hope this helps...good luck.