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3 years ago

What the freak is this 4^(x)-2^(x+1)=48

Mathematics

2 answers:

Dmitry_Shevchenko [17]3 years ago

7 0

Answer:

4^x - 2^(x+1) = 48

x=3

Step-by-step explanation:

kolbaska11 [484]3 years ago

3 0

Answer:

4^x+2^2x=47

Step-by-step explanation:

4^x+2^2x+1=48

We move all terms to the left:

4^x+2^2x+1-(48)=0

We add all the numbers together, and all the variables

4^x+2^2x-47=0

We move all terms containing x to the left, all other terms to the right

4^x+2^2x=47

You might be interested in

|x|, if x=10; .3; 0; −2.7; −9

alekssr [168]

Answer:

For $\left | x \right |$ we will have positive values only.

$\left | -2.7 |\right =2.7$

$\left | -9 |\right =9$

Rest are positive so will give positive values out of the modulus function.

Step-by-step explanation:

The absolute value of any number is its positive value only.

As for example $(-2.7)$ and $(2.7)$ both are having equal distance from $0$ in a number line, one on the left other on the right side of the number line but are equidistant from $0$ .

So absolute value of a number is its distance on number line from reference point $0$ .

One by one we will work with all of our question.

$\left | 10 |\right =10$

$\left | 0.3 |\right =0.3$

$\left | 0 |\right =0$

$\left | -2.7 |\right =2.7$

$\left | -9 |\right =9$

So we have to take the positive number out of the modulus function that is also called absolute value.

5 0

3 years ago

The mass of an isotope decreases at a rate that is proportional to the mass at that time.

Blizzard [7]

Answer:

7 milligrams

Step-by-step explanation:

4 0

3 years ago

Which of the following are equal to 25 miles

lions [1.4K]

E. D. A. I'm not 100% tho

3 0

3 years ago

Find the slope of the line.

Ivanshal [37]

(1,4) sorry that’s probably not right lmaaoaoo

4 0

3 years ago

The article "Influence of Penetration Rate on Penetrometer Resistance" (see textbook for reference) presents measures of penetra

snow_tiger [21]

Answer:

The 95% of confidence interval for the mean penetration resistance for this soil is (2.0823, 3.1977).

Step-by-step explanation:

The sample size is 15.

The first step to solve this problem is finding how many degrees of freedom there are, that is, the sample size subtracted by 1. So

$df = 15-1 = 14$

Then, we need to subtract one by the confidence level $\alpha$ and divide by 2. So:

$\frac{1-0.95}{2} = \frac{0.05}{2} = 0.025$

Now, we need our answers from both steps above to find a value T in the t-distribution table. So, with 14 and 0.025 in the t-distribution table, we have $T = 2.145$ .

Now, we need to find the standard deviation of the sample. That is:

$s = \frac{1.02}{\sqrt{15}} = 0.26$

Now, we multiply T and s

$M = T*s = 2.145*0.26 = 0.5577$

For the lower end of the interval, we subtract the mean by M. So 2.64 - 0.5577 = 2.0823

For the upper end of the interval, we add the mean to M. So 2.64 + 0.5577 = 3.1977

The 95% of confidence interval for the mean penetration resistance for this soil is (2.0823, 3.1977).

7 0

3 years ago