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olga nikolaevna [1]
3 years ago
5

What's 7 hours - 30mins ?

Mathematics
1 answer:
Naddik [55]3 years ago
8 0

Answer:

390 mins (or) 6 hours 30 mins

Step-by-step explanation:

7 hours = 420 mins

420 mins - 30 mins = 390 mins

390 mins = 6 hours 30 mins

Have a nice day!

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Which of the following gives a valid reason for using the given solution method to solve the system of equations shown? Equation
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Answer:

* Elimination; a coefficient in Equation I is an integer multiple of a coefficient in Equation II.

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Step-by-step explanation:

Equation I: 4x − 5y = 4

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These equation can only be solved by Elimination method

Where to Eliminate x :

We Multiply Equation I by a coefficient of x in Equation II and Equation II by the coefficient of x in Equation I

Hence:

Equation I: 4x − 5y = 4 × 2

Equation II: 2x + 3y = 2 × 4

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Therefore, the valid reason using the given solution method to solve the system of equations shown is:

* Elimination; a coefficient in Equation I is an integer multiple of a coefficient in Equation II.

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