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PilotLPTM [1.2K]
3 years ago
7

How many hours are in 8:15 to 12:45

Mathematics
2 answers:
dsp733 years ago
5 0
4:30
12:45-8:15=4:30
12-8=4
45-15=30
so...
the answer 4:30

Hope this helps 
DiKsa [7]3 years ago
4 0
Is 4:30 because ,12:45 take away 8:15= 4 :30 and 8 to 12 they are 4 and 45 take way 15 is 30
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Solve the following System Of Equations Using Substitution or Elimination Methods. Show Work.
Ostrovityanka [42]

Answer:

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Step-by-step explanation:

We will use substitution.

y = x^2 + 3

y = x +5

Since the second equation is equal to y, replace y in the first equation with the second equation.

y = x^2 + 3

x + 5 = x^2 + 3

Rearrange so that one side is equal to 0.

5 - 3 = x^2 - x

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0 = x^2 - x - 2

You may use quadratic formula or any form of factoring to find the zeros (x values that make the equation equal to 0).

a = 1, b = -1, c = -2

Zeros = \frac{-b + \sqrt{b^{2}-4ac }  }{2a} and \frac{-b - \sqrt{b^{2}-4ac }  }{2a}

Zeros = 2 and -1

Now that you have your x values, plug them into the equations to find their corresponding y values.

y = x^2 + 3

y = (2)^2 + 3

y = 7

Pair #1: (2,7)

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y = (-1)^2 + 3

y = 4

Pair #2: (-1,4)

Therefore, there are two pairs of solutions: (2,7) and (-1,4).

8 0
2 years ago
Please help me im very confused on how do do this stuff.
lianna [129]

Answer:

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Step-by-step explanation:

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8 0
3 years ago
Read 2 more answers
How much should you invest at 4% simple interest in order to earn $50 interest in 6 months
LenaWriter [7]
Simple interest formula
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P=principal (initial investment)
i=annual interest rate = 0.04
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Substitute values,
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4 0
3 years ago
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serg [7]

Think of when If you cross two lines you get a point where they meet

A point is a solution.

So if the lines never cross, then they would have no point, or A, No Solution

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3 years ago
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densk [106]

Answer:

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3 0
3 years ago
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