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Helga [31]
3 years ago
10

when oxygen reacts with hydrogen it has the capacity to release 29 kilojoules of energy. Inside a fuel cell, oxygen reacts with

hydrogen to produce 23 kilojoules of useful energy. The rest of the energy is lost as heat. Whats the efficiency percent of the fuel cell?
Mathematics
1 answer:
Pepsi [2]3 years ago
4 0

Answer:

79

Step-by-step explanation:

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Write the equation of the line that passes through the points (2 , -1) and has a slope of - 3​
svetlana [45]

Answer:

y=-3x+5

Step-by-step explanation:

y=mx+b

m=slope or gradient (=-3)

y=-3x+b  

Add your points

(2, -1)

-1=(-3 x 2)+b

-1= -6+b

-1+6=b

b=5

y=-3x+5

5 0
3 years ago
Read 2 more answers
Write the sum of the numbers as the product of their GCF and another sum <br> 56+64
olga2289 [7]
This is a question about finding the GCF or the greatest common factor for these two numbers.  The real question there is what is the largest number that both 56 and 64 can be divided by and still give out integers (meaning, whole regular counting numbers).  This number turns out to be 8.  56/8 = 7.  64/8 = 8.  The GCF gets pulled to the outside of the parenthesis and the divided numbers remain on the inside being added together.  It looks like this, 8(7+8).
7 0
3 years ago
Solve for x<br> x - 7/8 = 4<br><br> Give your answer as an improper fraction.
GREYUIT [131]
The answer is 39/8

If you need a step by step, just leave a comment
6 0
3 years ago
Which equation represents a line parallel to the graph of 2x-4y=16
MrMuchimi
First we need to isolate the y in the equation
-4y=16-2x (subtract the 2x)
4y=2x-16 (divide both sides by -1)
y=1/2x-4 (divide both sides by 4)

The we know the slope of this line is 1/2. I'm not sure what the choices are, but the answer would have to have a slope of 1/2. For example, y=1/2x+2 might be an answer.

Hope this helps
8 0
3 years ago
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What is the remainder when x 3 - 7x - 6 is divided by the linear factor x - 4? 4
mart [117]
Hello,

P(x)=x^3-7x-6

P(4)=4^3-7*4-6=30
Remainder=30

6 0
4 years ago
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