3 years ago

Solve 4^x+2 = 2^x-1. What are the exact and approximate solutions?

Mathematics

2 answers:

Brut [27]3 years ago

7 0

Answer:

C. x = -5 ln 2/ ln 2 = -5

Step-by-step explanation:

Juliette [100K]3 years ago

6 0

Answer:

no solution

Step-by-step explanation:

examples: 4^1 + 2 = 2^ 1 -1 and the answer is 6 = 1 which is not true. So its gonna be hard for them to have a solution.

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A train leaves Los Angeles at 2 p.m. heading north at 50 mph. If the next train leaves three hours later and also heads north at

Mamont248 [21]

Since the first train has been travelling for 3 hours, we have the following equations:
$d=50t+3*50=50t+150$
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We want to know when they will be equal, so set these equal to eachother:
$60t=50t+150$
$10t=150$
$t=15$

So 15 hours after the second train leaves, they will be at the same distance. This is at 8AM since the second train leaves at 5PM.

5 0

3 years ago

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Find one length of the square (7x-3) 3(x+1)

Svetllana [295]

Area of a square = Side × Side

Side = 7x-3

Area of the square = (7x-3) × (7x-3)

= 7x(7x-3) -3(7x-3)

= 49x^2 -21x -21x +9

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6 0