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expeople1 [14]
2 years ago
7

Help I dont get this at all​

Mathematics
1 answer:
stealth61 [152]2 years ago
8 0
B)257.1

Explanation: Area of a square : length x width
Area of square = 12x12= 144
Area of a circle: pie(radius)^2
diameter:12
radius:12/2=6
Area of a circle: pie(6)^2=113.1
ADD BOTH AREAS
Area of the figure =144+113.1
=257.1
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In a​ triangle, the measure of the first angle is twicetwice the measure of the second angle. the measure of the third angle is
grandymaker [24]
Write out the information that you can find out from the question; 

Angle 1(a)=2(b) <-- here b represents Angle 2 
Angle 3(c)=72+b 

a+b+c=180 

2b+b+72+b=180 
4b+72=180 
4b=180-72
4b=108 
b=108/4
b=27 

Angle a=2(b)
=2(27)
=54 degrees 

Angle b= 27 degrees 

Angle c=72+27
=99 degrees 

Hope I helped :) 
6 0
3 years ago
What is 5 yards rounded to the nearest tenth
blagie [28]

Answer: Its just 5

Step-by-step explanation: Its always the first digit of the number.

6 0
3 years ago
Read 2 more answers
A math club has 40 members. The number of girls is 5 less than 2 times the number of boys. How many members are boys? How many m
murzikaleks [220]
Let b=# of boys
Let g=# of girls
B+g=40
G=2b-5
Sub g into first equation and solve for b
B+2b-5=40
3b-5=40
3b=40+5
3b=45
B=45/3
B=15
Sub B into the second equation
G=2b-5
G=2(15)-5
G=30-5
G=25
Hope this helps!
6 0
3 years ago
I reallyy need help on this!<br> Thank you in advance
sattari [20]

Answer:828.96m^2

Step-by-step explanation:

radius(r)=8m

L=25m

π=3.14

total surface area of cone(tsa)=πxr^2+πxrxL

Tsa=3.14x8^2+3.14x8x25

Tsa=3.14x8x8+3.14x8x25

Tsa=200.96 + 628

Tsa=828.96

3 0
3 years ago
a charitable organization in Lanberry is hosting a black tie benefit. Yesterday, the organization sold 55 regular tickets and 49
jenyasd209 [6]

Answer:

  • regular: $67
  • VIP: $122

Step-by-step explanation:

Let r and v represent the costs of a regular and VIP ticket, respectively. The two sales can be represented by ...

  55r +49v = 9663

  79r +84v = 15541

We can subtract 7 times the second equation from 12 times the first to eliminate the v terms.

  12(55r +49v) -7(79r +84v) = 12(9663) -7(15541)

  660r +588v -553r -588v = 115,956 -108,787 . . . . . eliminate parentheses

  107r = 7169 . . . . . . . simplify

  r = 67 . . . . . . . . . . . divide by 107

Using this value in the first equation, we have ...

  55(67) +49v = 9663

  v = 5978/49 . . . . . . . . . subtract 3685, divide by 49

  v = 122

A regular ticket costs $67; a VIP ticket costs $122.

_____

<em>Additional comment</em>

When using "elimination" to solve a system of equations, you're looking for coefficients of the same variable that are related by small factors. Preferably, one coefficient is the same as, or a small multiple of, the other. Here, 55 and 79 (the coefficients of x) are not related by an integer, or a couple of small integers. On the other hand, the y-coefficients 49 and 84 have a common factor of 7, and are in the ratio 7:12, a pair of small numbers. This is why we chose to eliminate the y-variable.

The x-variable could be eliminated using 55 and -79 as multipliers of the equations. This results in larger numbers, and more chance for error. (Errors tend to creep in when computing or copying large numbers.)

Of course, any of several machine methods could be used to solve these equations, including graphing and matrix-solving functions. Here, we tried to honor the requirement to solve by elimination.

7 0
2 years ago
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