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LuckyWell [14K]
3 years ago
6

I feel dumb for not knowing this but i need help

Mathematics
1 answer:
Vesnalui [34]3 years ago
4 0
Dont feel dumb geometry is hard
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What number should be at pyramid
ValentinkaMS [17]

\tt Step-by-step~explanation:

To solve, we have to look for a pattern.

\tt Step~1:

When you see pyramids like these, they usually tell you to add/multiply the two numbers to get a third number that goes on top. Here, we can see 3 and 4 on the bottom left hand corner. The third number on top of both 3 and 4 is 7.  3 + 4 = 7. Let's check 4 and 5, the middle two numbers. 4 + 5 = 9, and that number is on top of 4 and 5. Therefore, we can confirm that this is an addition pyramid.

\tt Step~2:

Since 7 + 9 is 16 and 9 + 8 is 17, all we need to do in order to get the final number is to add 16 to 17.

\tt 16 + 17 =33

\large\boxed{\tt Our~final~answer: ~33}

5 0
3 years ago
the function f(x)=2•5x can be used to represent the curve through the points (1,10) (2,50) and (3,250). What is the multiplicati
Annette [7]
The answer would be 5
8 0
3 years ago
Read 2 more answers
If g is the variable, which mathematical sentence expresses the information below? "The number of gallons of gas in the tank plu
Firdavs [7]
An equation for the sentence would be g + 7 = 12, where g is the unknown number of gallons.
5 0
3 years ago
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If x = -1, x cubed + x
forsale [732]
(-1)(-1)(-1)+(-1)=-1-1=-2

-2

Hope this helps!
6 0
3 years ago
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the brain volumes ​(​) of 50 brains vary from a low of to a high of . use the range rule of thumb to estimate the standard devia
Sloan [31]

The estimated standard deviation from the range rule is 145.5 cm3.As it is 29.8 cm3 smaller than the exact standard deviation, we consider that the estimation is not accurate enough.

Generally, brain volumes which are smaller than 921.1 cm3 can be considered significantly low and bigger than 1417.5 cm3 can be considered significantly high. Hence, brain volume of 1457.5 cm3 is bigger than the expected maximum, so it can be considered significantly high.

The calculation goes like this,

According to the range rule, the standard deviation and range, or the distance between the maximum and smallest value, are roughly inversely proportional:

s=R/4

If we have a sample of 50 brains volumes, and they range from 910 cm3 to 1492 cm3, we can estimate the standard deviation as:

s=max-min/4

s=1492-910/4=582/4=145.5

The exact standard deviation is 175.3 cm3.The difference is 175.3-145.5=29.8 cm3, so the estimation is not accurate enough.

The range rule of thumb states that we should anticipate a maximum value that is approximately two standard deviations above the mean and a lowest value that is approximately two standard deviations below the mean. The expected ranges are as follows given our mean volume of 1169.3 cm3 and standard deviation of 124.1 cm3:

Min= M-2s=1169.3-2*124.1=921.1

Max=M+2s=1169.3+2*124.1=1417.5

The brain capacity of 1457.5 cm3 can be regarded as significantly high because it is higher than the predicted maximum.

To know about standard deviation click here :

brainly.com/question/23907081

#SPJ4

5 0
9 months ago
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