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musickatia [10]
4 years ago
7

Someone help me please

Mathematics
1 answer:
aleksklad [387]4 years ago
8 0
68% of the time, values will be within ONE std dev of the mean.
Thus, if the mean is 50 and the std. dev is 5, values will be between 45 and 55.
45 is one std dev below the mean, whereas 55 is one std dev above.

40 and 60 represent 2 std dev below the mean and above the mean, respectively.  95% of the time, values will be within the interval (40,60).

Here we're making use of the so called EMPIRICAL RULE.

99.9% of the time, values will lie within 3 std dev of the mean.  This comes out to (45, 65).  Unsure of how to conclude the 3rd question here.

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Please can someone answer this
Alecsey [184]

Answer:

theres not alot of info it just says boys, and ends there

Step-by-step explanation:

4 0
3 years ago
A box of colored pencils cost $4.50 if there are 40 pencils how much would 60 pencils cost
OLga [1]

Answer:

6.75

Step-by-step explanation:

7 0
3 years ago
Alaina has 7 in her bank account and earns 6 each day . joel has 48 in his banck account and earn 8 earch day in how many days w
Elis [28]

Answer:

I think you wrote something wrong.

Step-by-step explanation:

If Alaina has $7 in her bank account and Joel had $48 in his Joel already has more then Alaina but I will attempt to teach you how to solve these types of problems.

for this example I'm giving Alaina 79 dollars.

First we know were starting with 79 dollars and increasing 6 dollars each day so the equation for this is; y = 6x + 79 that is Alaina's equation.

For Joel our equation will be; y = 8x + 48.

Since they already have 79 and 48 dollars in their bank we put those as our B in the equation cause they are our y-intercepts. (Y = mx + b) Next we know their increasing by 6 and 8 dollars a day so we make those our m. Once we have these equations we can plot them and see where the lines meet. (thats our answer) I plotted them on desmos graphing calculator.

They crossed at (15.5, 172) Which means it will take 16 days for Joel to catch up they will both have 172 dollars in the bank account on the 16th day.

Hope this helps!

8 0
3 years ago
Mr. and Mrs. Parker's bed is 2 1/3 yards wide. That also have 2 nightstands that are 22 inches wide. The bedroom wall is 12 1/2
vampirchik [111]
Conversions: to smallest (inches)
n= 22 inches 
b= 2 1/3 yard = 84 inches
t= 12 1/2 feet = 150 inches


total space = t
night stand = n (2n for two nightstands)
bed=b

b+2n has to be < or = to t

84+2(22)=x
84+44=128
128 is < 150

therefore the answer is yes they will fit with 22 inches left over.

3 0
3 years ago
Read 2 more answers
Which coordinate plane shows the graph of 3x + y &gt; 9
RoseWind [281]
Well considering that you did not give any option to choose from I cant give you an answer,   but the graph should look like a line with the y-intercept at 9 and the x-intercept at 3, and all of the region to the right of the line shaded
4 0
3 years ago
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