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3 years ago

PLZ HELP ASAP WORTH 20 POINTS

Mathematics

2 answers:

melisa1 [442]3 years ago

8 0

Answer:

Step-by-step explanation:

Cut the base in half so now its 5 times the height or do base times height times 1/2 here is what both look like:

6x5= 30

10x6x1/2=30

sleet_krkn [62]3 years ago

5 0

3 times 10 equal 30 3*10

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A store holiday sale has an item marked down by $10 with an additional discount of 25% off the

ValentinkaMS [17]

Answer:

C : $58.36

Step-by-step explanation:

Given:

A store holiday sale has an item marked down by $10.

Discount on new price = 25%

Final price was $36.27.

Question asked:

what was the original ?

Solution:

Let original price = $x$

New price = $x - 10$

Original price - marked down amount - discount amount = $36.27

$x - 10 -25\% of(x - 10 ) = 36.27\\$

$x - 10 - \frac{25}{100} (x - 10) = 36.27\\x - 10 - 0.25(x - 10) = 36.27\\x - 10 -0.25x +2.5 = 36.27\\0.75x - 7.5 = 36.27\\$

Adding both side by 7.5

$0.75x = 43.77\\$

Dividing both side by 0.75

$x = 58.36$

Therefore, the original price was $58.36

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3 years ago

A farmhouse shelters 10 animals. Some are pigs and some are ducks. Altogether there are 36 legs. How many DUCKS are there?

creativ13 [48]

Answer:

2 ducks 8 pigs

Step-by-step explanation:

4 + 32 = 36

6 0

3 years ago

Read 2 more answers

H e l p m e p l e a s e

photoshop1234 [79]

Answer:

EcD= 52 DCB=128

Step-by-step explanation:

First, let's find out what x equals and what (x+11) equals

$(x+11)+(3x+5)=180\\4x+16=180\\4x=164\\x=41$

And therefore...

$x+11=52$

Now angle ecd is a vertical angle we just found.

So angle ECD= 52 degrees

And agles ECD and DCD and supplimntary

$52+?=180\\DCB=128$

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3 years ago

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The proper interpretation of a 95% confidence interval is: A. We are 95% confident that the point estimate is between the lower

soldier1979 [14.2K]

Answer: B. We are 95% confident that the population parameter is between the lower confidence limit and upper confidence limit.

Step-by-step explanation:

In statistics, we know that the interpretation of $(1-\alpha)\%$ level of confidence interval is that we are $(1-\alpha)\%$ sure that the true population parameter lies in it.

Therefore, the proper interpretation of a 95% confidence interval is that we are 95% confident that the population parameter is between the lower confidence limit and upper confidence limit.

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3 years ago

Use left-endpoint approximation to estimate the area under the curve of f(x)=x^3 on [1,3]. Use n = 4. Using the same function us

natulia [17]

Split up the interval [1, 3] into 4 intervals of equal length,

$\Delta x = \dfrac{3 - 1}4 = \dfrac12$

The left endpoint of the $i$ -th interval is

$\ell_i = 1 + \dfrac i2$

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$\displaystyle \int_1^3 f(x) \, dx \approx \sum_{i=1}^4 f(\ell_i)\Delta x \\\\ ~~~~~~~~ = \frac12 \sum_{i=1}^4 \left(1 + \frac i2\right)^3 \\\\ ~~~~~~~~ = \frac12 \sum_{i=1}^4 \left(1 + \frac{3i}2 + \frac{3i^2}4 + \frac{i^3}8\right) = \boxed{27}$

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1 year ago