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rodikova [14]
3 years ago
7

For what value of x do s 4^x=(1/8)^x+5

Mathematics
1 answer:
andrew-mc [135]3 years ago
3 0

Answer:

x=1.17

Step-by-step explanation:

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X-3y-7=0 , 3x-3y-15=0 solve this using cross multiplication​
rewona [7]

Answer:

x = 4 , y = -1

Step-by-step explanation:

x - 3y = 7 -- (1)

3x - 3y = 15 -- (2)

Rewriting (1), x = 3y + 7 -- (1)'

Substituting (1)' into (2),

3 ( 3y + 7 ) - 3y = 15

9y + 21 - 3y = 15

6y = -6

y = -1 -- (3)

Substituting (3) into (1),

x - 3 ( - 1 ) = 7

x + 3 = 7

x = 4 -- (4)

According to (3) and (4),

x = 4 , y = -1

8 0
3 years ago
4. According to statistics reported on IN-CORP a surprising number of motor vehicles are not covered by insurance. Sample result
son4ous [18]

Answer:

a) 0.23

b) The 95% confidence interval for the population proportion is (0.1717, 0.2883).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

Point estimate

The point estimate is:

\pi = \frac{46}{200} = 0.23

95% confidence level

So \alpha = 0.05, z is the value of Z that has a pvalue of 1 - \frac{0.05}{2} = 0.975, so Z = 1.96.

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.23 - 1.96\sqrt{\frac{0.23*0.77}{200}} = 0.1717

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.23 + 1.96\sqrt{\frac{0.23*0.77}{200}} = 0.2883

The 95% confidence interval for the population proportion is (0.1717, 0.2883).

5 0
3 years ago
Evaluate the expression when a = 3.<br><br> 2a =
MatroZZZ [7]
The expression would equal six because two times three is six.
7 0
3 years ago
Read 2 more answers
Please help asap i will mark branlist
Black_prince [1.1K]

Answer:

Answer is C.

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
What is the value of x
AnnZ [28]

Answer:

x = 8

Step-by-step explanation:

Formula for sum of interior angles is 180(n - 2)

For a 5 sided polygon the sum is;

180(5 - 2) =540°

The supplement of ∡ 59° = 180° - 59° = 121°

The supplement of ∡ 77° = 180° - 77° = 103°

The supplement of ∡ 66° = 180° - 66° = 114°

The supplement of ∡ 62° = 180° - 62° = 118°

The sum of the polygon is:

121° + 103° + 114° + 118° + (180 - 12x)° = 540°

456° + (180 - 2x)° = 540°

(180 -12x)° = 540° - 456° = 84°

12x = 180° - 84° = 96°

x = 96/12 = 8

7 0
3 years ago
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