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G(n)=3n^3-5 h(n)=2n-5 find(g+h)(2)

dlinn [17]

g(n) = 3n³ - 5 h(n) = 2n - 5 (g + h)(2) = g(2) + h(2)

g(2) = 3(2)³ - 5 = 3(8) - 5 = 24 - 5 = 19

h(2) = 2(2) - 5 = 4 - 5 = -1

g(2) + h(2) = 19 + -1 = 19 - 1 = 18

Answer: 18

4 0

3 years ago

PLZZ SEND HELP!!!!!!!!!!<br> WILL GIVE YOU BRAINLIEST! <br> Find

SOVA2 [1]

Answer:

find what?

Step-by-step explanation:

6 0

2 years ago

So I'm in an online class of geometry and one of the units is trig. but no matter how long i keep learning or trying to learn th

Arturiano [62]

Answer and explanation:

There are six main trigonometric ratios, namely: sine, cosine, tangent, cosecant, secant, cotangent.

Those ratios relate two sides of a right triangle and one angle.

Assume the following features and measures of a right triangle ABC

right angle: B, measure β
hypotenuse (opposite to angle B): length b

angle C: measure γ
vertical leg (opposite to angle C): length c

horizontal leg (opposite to angle A): length a
angle A: measure α

Then, the trigonometric ratios are:

sine (α) = opposite leg / hypotenuse = a / b

cosine (α) = adjacent leg / hypotenuse = c / b

tangent (α) = opposite leg / adjacent leg = a / c

cosecant (α) = 1 / sine (α) = b / a

secant (α) = 1 / cosine (α) = b / c

cotangent (α) = 1 / tangent (α) = c / b

Then, if you know one angle (other than the right one) of a right triangle, and any of the sides you can determine any of the other sides.

For instance, assume an angle to be 30º, and the lenght of the hypotenuse to measure 5 units.

sine (30º) = opposite leg / 5 ⇒ opposite leg = 5 × sine (30º) = 2.5

cosine (30º) = adjacent leg / 5 ⇒ adjacent leg = 5 × cosine (30º) = 4.3

Thus, you have solved for the two unknown sides of the triangle. The three sides are 2.5, 4.3, and 5.

7 0

2 years ago

An ostrich that is 108 inches tall is 20 inches taller than 4 times the height of a kiwi. What is the height of the kiwi in inch

Westkost [7]

So you take 20 inches and times it by 4 which equals 80 inches. So then you would take to 80 inches and divide by 108. then you will get your answer.

8 0

3 years ago

Historically, the proportion of people who trade in their old car to a car dealer when purchasing a new car is 48%. Over the pre

choli [55]

Answer:

$z=\frac{0.4 -0.48}{\sqrt{\frac{0.48(1-0.48)}{115}}}=-1.717$

$p_v =P(z$

So the p value obtained was a very low value and using the significance level given $\alpha=0.1$ we have $p_v$ so we can conclude that we have enough evidence to reject the null hypothesis, and we can said that at 5% of significance the proportion of people that have traded in their old car is lower than 0.48 or 48%.

Step-by-step explanation:

Data given and notation

n=115 represent the random sample taken

X=46 represent the number of people that have traded in their old car.

$\hat p=\frac{46}{115}=0.4$ estimated proportion of people that have traded in their old car

$p_o=0.48$ is the value that we want to test

$\alpha=0.1$ represent the significance level

Confidence=90% or 0.9

z would represent the statistic (variable of interest)

$p_v$ represent the p value (variable of interest)

Concepts and formulas to use

We need to conduct a hypothesis in order to test the claim that the proportion is less than 0.48.:

Null hypothesis: $p\geq 0.48$

Alternative hypothesis: $p < 0.48$

When we conduct a proportion test we need to use the z statistic, and the is given by:

$z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}}$ (1)

The One-Sample Proportion Test is used to assess whether a population proportion $\hat p$ is significantly different from a hypothesized value $p_o$ .

Calculate the statistic

Since we have all the info requires we can replace in formula (1) like this:

$z=\frac{0.4 -0.48}{\sqrt{\frac{0.48(1-0.48)}{115}}}=-1.717$

Statistical decision

It's important to refresh the p value method or p value approach . "This method is about determining "likely" or "unlikely" by determining the probability assuming the null hypothesis were true of observing a more extreme test statistic in the direction of the alternative hypothesis than the one observed". Or in other words is just a method to have an statistical decision to fail to reject or reject the null hypothesis.

The significance level provided $\alpha=0.1$ . The next step would be calculate the p value for this test.

Since is a left tailed test the p value would be:

$p_v =P(z$

So the p value obtained was a very low value and using the significance level given $\alpha=0.1$ we have $p_v$ so we can conclude that we have enough evidence to reject the null hypothesis, and we can said that at 5% of significance the proportion of people that have traded in their old car is lower than 0.48 or 48%.

4 0

3 years ago