All categories

3 years ago

Determine the area of the following polygon

Mathematics

1 answer:

Karo-lina-s [1.5K]3 years ago

8 0

Answer:

What are the numbers ? to it

You might be interested in

The Long family and the Harris family each used their sprinklers last summer. The water output rate for the Long family's sprink

horrorfan [7]

Answer:

Step-by-step explanation:

Given

Rate of Long family's sprinkler is 25 L/hr

rate of Harris family's sprinkler is 35 L/hr

Total time for which sprinkler is used =55 hr

Let long family run their sprinkler for x hr

therefore Harris family time=55-x

Total volume collected=1625 L

thus

$25\times x+35\times (55-x)=1625$

25x+1925-35x=1625

1925-1625=10x

300=10x

x=30 hr

long family used for 30 hr and Harris family used for 20 hr

4 0

3 years ago

The federal government would like to test the hypothesis that the average age of men filing for Social Security is higher than t

mixas84 [53]

Answer:

The 90% confidence interval is $-0.3433< \mu_1 - \mu_2 < 2.1433$

Step-by-step explanation:

From the question we are told that

The sample mean for men is $\= x_1 = 64.5 \ years$

The sample mean for women is $\= x_2 = 63.6 \ years$

The sample size for men is $n_1 = 35$

The sample size for women is $n_2 = 39$

The standard deviation for men is $s_1 = 3.0$

The standard deviation for women is $s_2 = 3.5$

From the question we are told the confidence level is 90% , hence the level of significance is

$\alpha = (100 - 90 ) \%$

=> $\alpha = 0.10$

Generally from the normal distribution table the critical value of $\frac{\alpha }{2}$ is

$Z_{\frac{\alpha }{2} } = 1.645$

Generally the standard error is mathematically represented as

$SE = \sqrt{\frac{s_1^2 }{n_1} + \frac{s_2^2}{n_2} }$

=> $SE = \sqrt{\frac{3^2 }{35} + \frac{3.5^2}{39} }$

=> $SE = 0.7558$

Generally the margin of error is mathematically represented as

$E = Z_{\frac{\alpha }{2} } * SE$

=> $E = 1.645 * 0.7558$

=> $E = 1.2433$

Generally 90% confidence interval is mathematically represented as

$(\= x_1 - \= x_2) -E < \mu_1 - \mu_2 < (\= x_1 - \= x_2) -E$

=> $(64.5 - 63.6) -1.2433< \mu_1 - \mu_2$

=> $-0.3433< \mu_1 - \mu_2 < 2.1433$

7 0

2 years ago

What is the negative square root of 4/9 ?

zavuch27 [327]

-2/3!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

6 0

3 years ago

Read 2 more answers

Identify each number as prime or composite. a. 16 b. 27 C. 13

lawyer [7]

A & B are composite while C is prime

4 0

3 years ago

Read 2 more answers

.Help Please! Is this a monomial, binomial, trinomial, or polynomial? Explain

zhenek [66]

Answer:

Polynomial

Step-by-step explanation:

=> x³ - 4x² + 1 + 3x² + x

=> x³ - x² + x - 1

This is a polynomial expression, as, there are 4 terms in the equation, viz., x³, x², x and -1.

Hope it helps.

4 0

2 years ago