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Snezhnost [94]
3 years ago
11

Solve the exponential equation: 2^3x+1 = 128

Mathematics
1 answer:
dsp733 years ago
3 0

Answer:

So x=2.32956156226

Step-by-step explanation:

First subtract 1 on both sides

2^3x=127

Now you can rewrite this as

(2^3)^x

As it still equals the same thing

Now 2^3 is 8

So the equation is now

8^x=127

So we use log formula

log8 127=x

So how many times do we have to multiply 8 by itself to get 127?

The answer is: 2.32956156226

Hope this helps!

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navik [9.2K]

Answer:

5y +3x=  25

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Step-by-step explanation:

An equation in standard form is:

Ax + By = c\\

Solving (a):

Given

m = -\frac{3}{5} --- slope

b = 5 --- y intercept

Required: Determine the equation

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y = mx + b

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y = -\frac{3}{5}x + 5

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Add  3x to both sides

5y +3x= 3x-3x + 25

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Solving (b):

Given

m = \frac{2}{3} --- slope

b = -4 --- y intercept

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An equation has the form:

y = mx + b

Substitute values for m and b

y = \frac{2}{3}x -4

Multiply through by 3

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