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2 years ago

Find the perimeter. Write your answer as a fraction, whole number, or mixed number

Mathematics

2 answers:

rodikova [14]2 years ago

7 0

Answer:

Well, first you'll have to do P (perimeter) = 2(a + b)

So: P= 2(68/15 + 32/5)*

P = 2(68/15 + 96/15)

P = 2(164/15)

Then, do the equation:

328/15

Hopefully, this helps! If it doesn't, tell me what I need to provide in my answer so I can answer your question :)

*There the mixed numbers of the two angles

saw5 [17]2 years ago

4 0

Answer:

${ \tt{perimeter = s_{1} + s _{2} + ....... + s _{n} }}$

» We're given a parallelogram with for sides, so n = 4

${ \tt{perimeter = 4 \frac{8}{15} + 6 \frac{2}{5} + 4 \frac{8}{15} + 6 \frac{2}{5} }} \\ \\ = { \tt{(4 \frac{8}{15} + 4 \frac{8}{15} ) + (6 \frac{2}{5} + 6 \frac{2}{5}) }} \\ \\ = { \tt{2(4 \frac{8}{15} + 6 \frac{2}{5}) }} \\ \\ = { \tt{2( \frac{68}{15} + \frac{32}{5}) }} \\ \\ { \tt{ = 2 \times \frac{164}{15} }} \\ \\ = { \tt{ \frac{328}{15} }} \\ \\ { \boxed{ \tt{ \: perimeter = { \blue{\frac{328}{15}}} \: \: or \: \:{ \blue{ 21 \frac{13}{15}}} \: \: or \: \: { \blue{ \tt{22}}} \: \: or \: \: { \blue{21.8667}} }}}$

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2) Complete the table. x 20 200 2000 15 20

Dimas [21]

I think it’s 25 but I’m not too sure

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2 years ago

Find the quotient of -85^2-27n+76 / -17n-19

bagirrra123 [75]

Answer:
5n-4

Explanation:
The given expression is:
$\frac{-85n^2-27n+76}{-17n-19}$

1- Take the negative as a common factor from both the numerator and the denominator. This will give us:
$\frac{-(85n^2+27n-76)}{-(17n+19)}$

2- Cancel out the negative sign (common factor) from the numerator and denominator. This will give us:
$\frac{(85n^2+27n-76)}{(17n+19)}$

3- Factor the numerator. This wil give:
$\frac{(5n-4)(17n+19)}{(17n+19)}$

4- Finally, cancel out the (17n+19) which common in both numerator and denominator. This will give us the final expression:
5n-4

Hope this helps :)

6 0

3 years ago

PLEASE HELP ME I BEG I WILL GIVE BRAINLIEST

ohaa [14]

Answer:

Mean = (2.2 + 2.4 + 2.5 + 2.5 + 2.6 + 2.7)/6 = 2.48

Standard deviation = √(summation(x - mean)²/n

n = 6

Summation(x - mean)² = (2.2 - 2.48)^2 + (2.4 - 2.48)^2 + (2.5 - 2.48)^2 + (2.5 - 2.48)^2 + (2.6 - 2.48)^2 + (2.7 - 2.48)^2 = 0.1484

Standard deviation = √(0.1484/6

s = 0.16

Standard error = s/√n = 0.16/√6 = 0.065

Part B

Confidence interval is written as sample mean ± margin of error

Margin of error = z × s/√n

Since sample size is small and population standard deviation is unknown, z for 98% confidence level would be the t score from the student t distribution table. Degree of freedom = n - 1 = 6 - 1 = 5

Therefore, z = 3.365

Margin of error = 3.365 × 0.16/√6 = 0.22

Confidence interval is 2.48 ± 0.22

Part C

We would set up the hypothesis test. This is a test of a single population mean since we are dealing with mean

For the null hypothesis,

H0: µ = 2.3

For the alternative hypothesis,

H1: µ > 2.3

This is a right tailed test

Since the number of samples is small and no population standard deviation is given, the distribution is a student's t.

Since n = 6

Degrees of freedom, df = n - 1 = 6 - 1 = 5

t = (x - µ)/(s/√n)

Where

x = sample mean = 2.48

µ = population mean = 2.3

s = samples standard deviation = 0.16

t = (2.48 - 2.3)/(0.16/√6) = 2.76

We would determine the p value using the t test calculator. It becomes

p = 0.02

Assuming significance level, alpha = 0.05.

Since alpha, 0.05 > than the p value, 0.02, then we would reject the null hypothesis. Therefore, At a 5% level of significance, the sample data showed significant evidence that the mean absolute refractory period for all mice when subjected to the same treatment increased.

Step-by-step explanation:

7 0

3 years ago

2-1/2 cups water minus 1-2/3 cups water =

weeeeeb [17]

The difference between the mixed numbers is equal to 5/6.

<h3>How to perform the subtraction between the two mixed numbers?</h3>

A mixed number is a number that is written as a whole number plus an improper fraction, here we want to compute:

(2 + 1/2) - (1 + 2/3)

We can group the whole numbers and the fractions, so we get:

(2 - 1) + (1/2 - 2/3)

Now we can simplify this so we get:

(2 - 1) + (1/2 - 2/3)

= 1 + (3/6 - 4/6) = 1 - 1/6 = 6/6 - 1/6 = 5/6

We conclude that the difference between the mixed numbers is equal to 5/6.

If you want to learn more about mixed numbers:

brainly.com/question/1746829

#SPJ1

7 0

2 years ago

Using the figure below, select the pairs of complementary angles.

Mila [183]

Answer:

c) <DBE and <EBC

Step-by-step explanation:

This is because when added together, both angles equal 90 degrees.

Complementary angles always equal 90 degrees.

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3 years ago