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kupik [55]
3 years ago
12

1 / f = 1 / a + 1 / b

Mathematics
1 answer:
Sphinxa [80]3 years ago
6 0

That equation can represent the relationship among the image distance,
object distance, and focal length of a lens. 

It could describe the effective resistance of two resistors in parallel, the
effective inductance of two coils in parallel, or the effective capacitance
of two capacitors in series. 

Thanks for sharing it.  Now, did you have a question to ask ?

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PLEASEEE HELP!!!!!!! Tim sells two types of pizza. He charges $10 for a cheese pizza and $15 for a pepperoni pizza. Yesterday he
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Answer:

$880

Step-by-step explanation:

This is called a system of equations!! Here's how to do it:

1. Make Equations

In this case, the equations would be

  • p+c=64 (this is saying that pepperoni pizzas plus cheese pizzas equal 64, which we got from the question.)
  • 1/3c=p (this is telling us that he sells 1 pepperonis for 1/3 cheese pizza)

2. Solve the system of equations

For this problem, we will substitute 1/3c for p. The problem becomes

  • 4/3c = 64

Then you divide by 4/3 to get p by itself:

  • p=48

Now substitute 48 for p in the first equation.

  • c=16

3. Find the money amounts

Now that you know that pepperoni pizzas equal 48, and cheese equals 16, this is easy.

  • Multiply 16*10 to get the cheese cost. ($160)
  • Multiply 15*48 to get the pepperoni cost ($720)
  • Then add those to get the total!
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Check the picture below.

Make sure your calculator is in Degree mode.

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