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ludmilkaskok [199]
3 years ago
13

I need help in everything

Mathematics
2 answers:
elena-s [515]3 years ago
4 0
<span>-6f+13=2f-11
-6f - 2f  = -11 - 13
-8f = -24
   f = 3</span>
Readme [11.4K]3 years ago
3 0
The first thing you do is subtract 13 from both sides. you end up with -6f=2f-24.
then you subtract 2f from both sides. you end up with -6f-2f=-24 or -8f=-24.
then you divide -8 from both sides. you get f=3. I hope I helped.

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A 16 ft monument consists of a rectangular prism and a square pyramid, as shown below. If the exposed surfaces of the monument a
icang [17]

Answer and Step-by-step explanation:

The actual answer is 348.

4 rectangles with area 60 each, which, when added together, equals 240.

1 square with area 36.

Each triangle face is 18 each, so 72.

<u>Add those together and the answer is 348 </u>ft^2<u> :).</u>

<u></u>

<u></u>

<u><em>#teamtrees #PAW (Plant And Water)</em></u>

4 0
3 years ago
Considering the number of questions incorrect from classmates on a quiz {10, 11, 12, 13, 13, 13, 14, 15, 16, 16, 17, 18, 18, 19,
IrinaK [193]

Answer:

According to the Empirical Rule, 68% of the data should fall between 11.98 and 18.02

Step-by-step explanation:

We are given the following data in the question:

10, 11, 12, 13, 13, 13, 14, 15, 16, 16, 17, 18, 18, 19, 20

Formula:

\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}}  

where x_i are data points, \bar{x} is the mean and n is the number of observations.  

Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}

Mean =\displaystyle\frac{225}{15} = 15

Sum of squares of differences = 25 + 16 + 9 + 4 + 4+ 4 + 1 + 0+ 1+ 1 + 4 + 9 + 9+ 16 + 25 = 128

S.D = \sqrt{\dfrac{128}{14}} = 3.02

Empirical rule:

  • According to this rule almost all the data lies within three standard deviation of the mean for a normal distribution.
  • About 68% of data lies within one standard deviation of the mean.
  • About 95% of data lies within two standard deviations of mean.
  • Arround 99.7% of data lies within three standard deviation of mean.

Thus, by empirical rule,

\mu \pm 1\sigma = 15\pm (3.02) = (11.98,18.02)

According to the Empirical Rule, 68% of the data should fall between 11.98 and 18.02

5 0
3 years ago
What expression is equivalent to (2a - 7) + 5(3 - a)
Colt1911 [192]

Answer:

Step-by-step explanation:

2a-7+15-5a

2a-5a-7+15

-3a+8

7 0
2 years ago
Mandy buys 5 packs of organic milk for the neighborhood store is priced at $3.96 how much does Mandee's spend and all of his pur
lana [24]

Answer:

$19.80

Step-by-step explanation:

3.96 is the price so if you multiply it by 5 you get your answer.


the rest of the question doesnt make much sense so hope this helped?

6 0
3 years ago
The endpoints of AB are given. Find the coordinates of the midpoint C.<br> A (12,-5) and B (-3, 2)
Ira Lisetskai [31]

Answer:

Step-by-step explanation:

(12-3)/2 = 9/2

(-5-3)/2= -8/2= -4

(9/2, -4)

3 0
3 years ago
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