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3 years ago

Solve exponential equations 5x − 2=625

Mathematics

1 answer:

coldgirl [10]3 years ago

6 0

Answer:

Step-by-step explanation:

$5^{x-2}=625\\\\5^{x-2}=5^4\qquad(5^4=5\cdot5\cdot5\cdot5=625)\\\\5^{x-2}=5^4\Rightarrow x-2=4\qquad\text{add 2 to both sides}\\\\x-2+2=4+2\\\\x=6\\\\\text{check:}\\\\5^{6-2}=5^4=625\qquad\bold{CORRECT}$

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ozzi

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7(6) = 42
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4(3) = 12
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2 years ago

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We have to assume that the speed before being stuck was sufficient to get to the destination on time had there been no delay. Call that speed "s" in km/h.

Since 200 km is "halfway", the total distance must be 400 km.

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2 years ago

3 + 2(2x + 8) = 1 is equivalent to:

suter [353]

Answer:

x = $-\frac{9}{2}$

Step-by-step explanation:

=> 3+2(2x+8) = 1

=> 3+4x+16 = 1

=> 4x+19 = 1

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Answer:

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