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Sav [38]
3 years ago
6

Evaluate the expression

Mathematics
2 answers:
Verdich [7]3 years ago
7 0

Answer:

2

Step-by-step explanation:

Let's focus on the top part first, 2y-6 and we know y=5.

So 2(5) -6 is the equation, 2x5 is 10 and 10-6 is 4 so what we are left with is 4÷x we are also told that x is equal to 2. So 4÷2 is 2 and that's the final answer!

Hopefully this will help, have a great day!

nekit [7.7K]3 years ago
3 0

Answer:

2

Step-by-step explanation:

2Y = 10

10 - 6 = 4

x = 2

4/2 = 2

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1. If a - b = 4 and a + b = 12, what is the<br> value of a?
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I think this is what you are looking for:

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b

=

−

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+

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(

a

−

b

)

2

=

a

2

+

b

2

−

2

a

b

=

40

+

2

×

12

=

64

∴(−)=64‾‾‾√=±8

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(

a

−

b

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8

So, 2−2=(+)(−)

a

2

−

b

2

=

(

a

+

b

)

(

a

−

b

)

2−2=(4)(±8)=±32

a

2

−

b

2

=

(

4

)

(

±

8

)

=

±

32

Hope that helps and sorry if it is confusing!

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