All categories

4 years ago

What is the simplified form of 3 over x squared all over 1 over x-cubed ?

Mathematics

2 answers:

Ainat [17]4 years ago

8 0

5 I think I am a 5 th

Karo-lina-s [1.5K]4 years ago

4 0

Answer:

The answer is 3x....

Step-by-step explanation:

Lets re-write the given expression:

3/x² ÷ 1/x³

Now we know that the division will be changed into multiplication and the denominator of the second term will become numerator.

3/x² * x³/1

Now the expression becomes:

3x³/x²

According to the laws of exponents when you divide variables, just find the difference of their exponents. Therefore,

3x³/x² = 3x³-² = 3x

Thus the answer is 3x....

You might be interested in

The function f is defined by f(x)=x^2-5 find f(2y)

Anuta_ua [19.1K]

$\bf f(x)=x^2-5\qquad \qquad f(2y)=(2y)^2-5\implies f(2y)(2^2y^2)-5
\\\\\\
f(2y)=4y^2-5$

4 0

3 years ago

(6x2 - 2x) + (5x-7)

Black_prince [1.1K]

Answer:

D. 6x2 + 3x - 7

Step-by-step explanation:

7 0

2 years ago

The test statistic of zequals2.32 is obtained when testing the claim that pgreater than0.3. a. Identify the hypothesis test as b

Sonja [21]

Answer:

a) We need to conduct a hypothesis in order to test the claim that the true proportion p is greatr than 0.3, so then the system of hypothesis are.:

Null hypothesis: $p \leq 0.3$

Alternative hypothesis: $p > 0.3$

Right tailed test

b) $p_v =P(z>2.32)=0.0102$

c) 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 1% of significance the proportion of interest is higher than 0.3

Step-by-step explanation:

Part a: Concepts and formulas to use

We need to conduct a hypothesis in order to test the claim that the true proportion p is greatr than 0.3, so then the system of hypothesis are.:

Null hypothesis: $p \leq 0.3$

Alternative hypothesis: $p > 0.3$

Right tailed test

When we conduct a proportion test we need to use the z statisitc, 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

For this case the statistic is given by $z_{calc}= 2.32$

Part b: 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 next step would be calculate the p value for this test.

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

$p_v =P(z>2.32)=0.0102$

Part c

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 1% of significance the proportion of interest is higher than 0.3

6 0

3 years ago

Question 1: The Millers have hired an interior designer to decorate their family room. they want to have a 22" by 30" oil painti

____ [38]

Answer: Total molding cost is $197.20.

Step-by-step explanation:

Since we have given that

Length of oil painting frame = 22 inch

Width of oil painting frame = 30 inch

Width for molding = 4 inches

So, Length after molding would be

4+22+4 = 30 inches

Width after molding would be

4+30+4 = 38 inches

So, Perimeter of molding would be

$2(L+B)\\\\=2(30+38)\\\\=2\times 68\\\\=136\ inches$

Cost per inch = $1.45

So, Total molding cost would be

$1.45\times 136\\\\=\$197.20$

Hence, Total molding cost is $197.20.

6 0

3 years ago

ben plays basketball every 6 times in 3 weeks. At this rate, how many times does he play basketball in 10 weeks

Ratling [72]

Answer:

Step-by-step explanation:

hope it helps

6 0

3 years ago

Read 2 more answers