Six times a number is decreased by 5, the result is 19.what is the number?
1 answer:
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-x - 2y = -10 |add x to both sides
-2y = x - 10 |divide both sides by (-2)
y = -0.5x + 5
for x = 0, y = -0.5(0) + 5 = 0 + 5 = 5 ⇒ (0; 5)
for x = -2, y = -0.5(-2) + 5 = 1 + 5 = 6 ⇒ (-2; 6)
for x = 2, y= -0.5(2) + 5 = -1 + 5 = 4 ⇒ (2; 4)
The graph in the picture
-2y = x - 10 |divide both sides by (-2)
y = -0.5x + 5
for x = 0, y = -0.5(0) + 5 = 0 + 5 = 5 ⇒ (0; 5)
for x = -2, y = -0.5(-2) + 5 = 1 + 5 = 6 ⇒ (-2; 6)
for x = 2, y= -0.5(2) + 5 = -1 + 5 = 4 ⇒ (2; 4)
The graph in the picture