X + y = 1.....multiply by -1
4x + y = -23
---------------
-x - y = -1 (result of multiplying by -1)
4x + y = -23
---------------add
3x = - 24
x = -24/3
x = -8 <====
x + y = 1
-8 + y = 1
y = 1 + 8
y = 9 <====
Answer:
c
Step-by-step explanation:
Answer:
Step-by-step explanation:
m = -3
y -y1 = m(x -x1)
y - 4 = -3(x -5)
y - 4 = -3x + 15
y = -3x + 15 + 4
y = -3x + 19
g(5) = -3*5 + 19 = -15 + 19 = 4
g(3) = -3*3 + 19 = -9 + 19 = 10
Total money Tammy has = $70
Money she is left with now = $19.54
Therefore, the money she used on coffee =
70 - 19.54 = $50.46
Now,
1 pound coffee costs $8.41
Pounds of coffee she bought = 50.46 ÷ 8.41
= 6 pounds
