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liraira [26]
3 years ago
8

Which polygons are NOT quadrilaterals? Select THREE that apply.

Mathematics
1 answer:
Afina-wow [57]3 years ago
6 0

Answer:

a cylinder, a sphere, and that little half sphere thing, oh and a triangular pyramid

Step-by-step explanation:

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Trying this again for another 30 point and brainly
ki77a [65]

Answer:

10

Step-by-step explanation:

5 0
3 years ago
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Explain how can you determine if a solid has reflectional<br> symmetry.
Pani-rosa [81]

Answer: When a solid can be mapped onto itself by a reflection in a plane, it has reflectional symmetry.

Step-by-step explanation:

4 0
3 years ago
Find the missing variable for a tralezoid. A=68^2 b=<br> h=4 B=21
Bezzdna [24]
The answer is:  " 2291 units " .
____________________________________________
Explanation:
____________________________________________
Formula for "Area of a trapezoid" :
____________________________________________
Area = (1/2) * (base length 1 + base length 2) * height;

or:  A = (1/2) * (b + B) * h.

We are missing the value for "b" one of the base lengths.

However, since:  A = 68² (given) ;  B (the other base length) = 21;  and the perpendicular height, "h" = 4 ;  we can plug this values into the formula, and solve for "b" ;
________________________________________________
A = (1/2) * (b + B) * h ;  ↔  68² = (1/2) * (b + 21) * 4 ;

 ↔  <span>4624 = 2 (b + 21) = 2b + 42 ;

</span> ↔  <span>4624 = 2b + 42 ; 

</span> ↔  <span>2b + 42 = 4624 ;

Subtract "42" from each side of the equation:

     2b + 42 - 42 = 4624 - 42 ;

to get:   2b = 4582 ;
</span>___________________________________________________
    Now, divide each side of the equation by: "2" ; to isolate "b" on one side of the equation; and to solve for "b" ;
___________________________________________________
             2b / 2 = 4582 / 2 ;
___________________________________________________
 to get:    b = 2291 units.
___________________________________________________
6 0
3 years ago
Read 2 more answers
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luda_lava [24]

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Step-by-step explanation:

The standard deviation of the distribution of sample means is called the standard error of the means.

It is denoted by: \sigma_{\bar X}

The standard error is calculated using the formula: \sigma_{\bar X}=\frac{\sigma}{\sqrt{n} }

where n is the sample size and \sigma is the population standard deviation.

6 0
3 years ago
A tabletop has an area of 12 square feet and a perimeter of 16 ft. What are the dimensions of the table? 2 ft by 6 ft 2 ft by 8
ICE Princess25 [194]

Answer:2ft by 6ft

Step-by-step explanation:

4 0
3 years ago
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