Answer:
We'll use this equation:
b = y - mx then we solve for b by inputting the slope (-2) into "m" and use the "x" and "y" values from the given point. (0, 3)
b = 3 --2*0
b = 3
Then we enter "b" into this equation:
y = mx +b
y = -2x + 3
Source:
https://www.1728.org/distance.htm
Step-by-step explanation:
Should be 1,394.
Hopefully that helps
a)
b) The cost per year is 365 times this amount. You save 35/50 times that, so you save ...
... $0.045×365×35/50 = $11.4975 ≈ $11.50 . . . annual savings
_____
If the bulb is using 15 W instead of 50 W, you are saving the cost of 50-15=35 W, so 35/50 of the cost of running the higher-power bulb.
Answer:
y = - 10
Step-by-step explanation:
Given that y varies directly with x then the equation relating them is
y = kx ← k is the constant of variation
To find k use the condition y = 2 when x = - 4, that is
2 = - 4k ( divide both sides by - 4 )
= k, that is
k = -
y = - x ← equation of variation
When x = 20, then
y = - × 20 = - 10