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ikadub [295]
2 years ago
13

If f(x)= -2x^3 +14-8 if g(x)= 2x+6 find p(x) and g(x) hurry upp please

Mathematics
1 answer:
Ierofanga [76]2 years ago
6 0

Answer:x=3

Step-by-step explanation:

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Hi! It’d be really helpful if someone could explain he two questions below, thanks!
kow [346]
Okay sounds good thanks for the invite too but that’s okay I’m just watching the movie theater and I got my own business cards and then I’ll mail them
4 0
1 year ago
A gallon of milk costs $3 nowIf the price is increasing 10% per year, how long before a gallon of milk costs $10 a gallon? Round
r-ruslan [8.4K]

Answer:

The answer is 33 years.

Step-by-step explanation:

10% of 3 is .3

Just move the decimal to the left.

.3 times 33=9.9

9.9~10

3 0
3 years ago
The heights of a random sample of 50 college students showed a mean of 174.5 centimeters and a standard deviation of 6.9 centime
Minchanka [31]

Answer:

Step-by-step explanation:

Hello!

For me, the first step to any statistics exercise is to determine what is the variable of interest and it's distribution.

In this example the variable is:

X: height of a college student. (cm)

There is no information about the variable distribution. To estimate the population mean you need a variable with at least a normal distribution since the mean is a parameter of it.

The option you have is to apply the Central Limit Theorem.

The central limit theorem states that if you have a population with probability function f(X;μ,δ²) from which a random sample of size n is selected. Then the distribution of the sample mean tends to the normal distribution with mean μ and variance δ²/n when the sample size tends to infinity.

As a rule, a sample of size greater than or equal to 30 is considered sufficient to apply the theorem and use the approximation.

The sample size in this exercise is n=50 so we can apply the theorem and approximate the distribution of the sample mean to normal:

X[bar]~~N(μ;σ2/n)

Thanks to this approximation you can use an approximation of the standard normal to calculate the confidence interval:

98% CI

1 - α: 0.98

⇒α: 0.02

α/2: 0.01

Z_{1-\alpha /2}= Z_{1-0.01}= Z_{0.99} =2.334

X[bar] ± Z_{1-\alpha /2} * \frac{S}{\sqrt{n} }

174.5 ± 2.334* \frac{6.9}{\sqrt{50} }

[172.22; 176.78]

With a confidence level of 98%, you'd expect that the true average height of college students will be contained in the interval [172.22; 176.78].

I hope it helps!

4 0
3 years ago
54 divided by 1200 remainder as a fraction quick
BaLLatris [955]

22  1111111 /5000000

7 0
3 years ago
Read 2 more answers
A phone sells for $245. It is now on sale for 20% off the original price. How many dollars off is the phone?
Marysya12 [62]

Answer:

B $49

Step-by-step explanation:

the answer want how much off right? then just take the 20% off × $245 =

\frac{20}{100}  \times 245 = 49

20% = 20/100

6 0
3 years ago
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