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Alex17521 [72]
3 years ago
6

Let f(x) = 3x + 5

Mathematics
1 answer:
sashaice [31]3 years ago
4 0
The answer is C, -7 because:

f(x)=3(-4)+5=-7
F(x)=-4(-4)+7=-7
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PLZ HELP!!!
dexar [7]

Solution:

The given equation is:

3^2 x + 7^2= 2 ^x\\\\9 x +49 =2^x

A: Taking , x=1

L H S = 9 × 1  + 49 = 9 + 49= 58

R H S : 2^x=2^1=2

L H S ≠   R H S

B: Taking x=3

L H S = 9 × 3 + 49=27 + 49=76

R HS = 2^x = 2^3 = 8

L H S ≠  R H S

C: Taking x=5

L H S = 9 × 5 + 49

        = 45 + 49

       = 94

R H S:

2^x=2^5=32

L H S ≠ R H S

(D)

when , x= 8

L H S

9 × 8 + 49

= 72 + 49

= 121

R HS:

2^x=2^8 =256

L H S ≠ R H S






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Step-by-step explanation:

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Step-by-step explanation:

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