Answer:
Net power = 20kW
B.) $128
Step-by-step explanation:
Given that :
Coefficient of performance = 2.5
Rate = 20kW
The net power required to operate the heat pump :
Energy delivery rate / Coefficient of performance
= 20kW / 2.5
= 8kW
B.) Given that electricity cost equals $0.08 per kW
If pump operates for 200 hours
Total energy used in kWhr :
8kW * 200= 1600kW
Cost per kW = $0.08
1600 * 0.08 = $128
(0, -6) , (1 , -4) , ( 2 , -2)
Please tell me if I’m wrong
The first thing that you do when simplifying an expression with the variable’s values known is to distribute the values. EXAMPLE:
3(7x+9)+6(-16x-40); distribute:
21x+27-96x-240; combine like terms:
(21x+(-96x))+(27+(-240))——-> -75x-213; now plug in the values and solve: -75(6)-213=-663
Answer:
<u>B. y -2 = 1/2(x-3)</u>
Step-by-step explanation:
Parallel lines have the same gradient
Therefore; the gradient or slope of a line parallel to line, y = 1/2x -7 will be 1/2
Since now we know that the line passes through a point (-3,-2) and has a slope of 1/2 we can get its equation.
We have points, (x,y) and (-3,-2) and a slope of 1/2
Thus;
(y -(-2))/ (x- (-3)) = 1/2
(y+2)/(x+3) = 1/2
2(y+2) = x + 3, dividing both sides by 2
we get;
y + 2 = 1/2(x+ 3)
<u>This is equivalent to; B. y -2 = 1/2(x-3) </u>
First, subtract 5 from each side to equal:
8x ≤ 40
Now, divide each side by 8:
x ≤ 5 miles
Hope this helps!! :)
