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Oduvanchick [21]
3 years ago
8

Solve the system

Mathematics
1 answer:
konstantin123 [22]3 years ago
7 0
Use substitution. 

y = 2 - x and y = 4x + 7 can become

2 - x = 4x + 7

Now solve for x

-5 = 5x

-1 = x

Now plug -1 for x in either equation.

y = 2 - x -> y = 2 - (-1) -> y = 3
y = 4x + 7 -> y = 4*-1 + 7 -> y = -4 + 7 -> y = 3

So C) is the correct answer.
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Answer:

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Step-by-step explanation:

log20 = 1.301 (when you see only "log" with no base, it is taken as a base 10)

This basically means:

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Since we don't know what  log_{100}20  is equal to, we will say  log_{100}20 = x

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Now you will notice that both of these equations are equal to 20.

Since 20 = 20,

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(we get 2x because an exponent to the power of an exponent (2^{x}) is the same as 2 * x)

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