Answer:
Answer
Answer is option A gained 5 points
Step-by-step explanation:
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Find slope using the slope formula.
m=(y2-y1)/(x2-x1)
m=(-2-0)/(2+6)
m=-2/8
m= -1/4
Knowing y=mx+b, plug in m.
y=(-x/4)+b
Plug in a coordinate pair to find the b value. (Either works)
-2=(-2/4)+b
-2=-1/2+b
-2+1/2=b
-3/2=b
Plug in the b value to give the final equation.
y=(-x/4)-3/2
Step-by-step explanation:
the function actually is
y = 40(x - 1) + 70 = 40x - 40 + 70 = 40x + 30
still, the slope (the factor of x) is 40.
that means y (the cost) increases by 40 for every additional hour (x increases by 1).
so, the rate of change (slope) is 40/1 = $40 per hour.
Answer:
x = 0
Step-by-step explanation:
2(x+7) 2x + 20 - 2 = x+4(2x + 8) start by distributing
2(x+7) would be 2x+14
4(2x+8) would be 8x+32
2x+14 x 2x + 20 - 2 = x + 8x + 32 now combine like terms
2x and 2x can be combined on the left side
x and 8x can be combined on the right side
4x + 14 + 20 - 2 = x + 8x + 32
4x + 32 = 9x + 32 you can now solve this equation
start by subtracting 4x on both sides
32 = 5x +32 now subtract 32 on both sides
0 = 5x so x = 0
