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I am Lyosha [343]
4 years ago
9

In the equation 3a+2(4a-1)=9 what is value of a ?

Mathematics
2 answers:
MrMuchimi4 years ago
7 0
Here is the answer
I did it with steps
3a+2(4a-1)=9
3a+8a-2=9
11a=11
a=1
Temka [501]4 years ago
5 0
3a+2(4a-1) = 9
3a+8a-2 = 9
11a -2= 9
plus 2 to get rid of the minus 2 and plus 2 to 9 aswell
11a=11
a=1
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Find the measure of each interior angle
diamong [38]
\bf \textit{sum of all interior angles of a polygon}\\\\
180(n-2)\quad 
\begin{cases}
n=\textit{number of sides}\\
---------\\
n=10
\end{cases}\implies 180(10-2)\implies 1440\\\\
-------------------------------\\\\
\begin{array}{lclll}
&x + 5\\&x + 10\\&x + 20\\&x + 30\\&x + 35\\&x + 40\\&x + 60\\&x + 70\\&x + 80\\+&x + 90\\
&----\\
&10x+440
\end{array}\implies 
\begin{array}{llll}
10x+440=1440
\\\\\\
10x=1000
\\\\\\
x=\cfrac{1000}{10}\implies x=100
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so.. to get every angle, simply plug in 10 for "x" for each.
3 0
3 years ago
This is a pyramid problem so please help out
Degger [83]

Answer:

Step-by-step explanation:

LA, Laterial Surface Area, is the lateral surface area of a pyramid. In this case, it is the sum of five triangles with base of 12cm and height that can be calculated as follow:

height^2 = 8.26^2 + 20^2 = 468.23

height = 21.64cm

LA = 5*1/2*12*21.64

= 649.2cm^2

SA, Surface Area, is the sum of LA and base area.

Base area = 5*1/2*12*8.26 = 247.8cm^2

SA = 649.2 + 247.8 =897cm^2

Volume, V = 1/3 * base area * height

= 1/3 * 247.8 * 20

= 1652cm^3

4 0
3 years ago
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Zinaida [17]

Answer:

1 no association

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3 0
3 years ago
If x varies directly as y and x= 18 when y =3 find x when y=7
denpristay [2]

Answer:

42

Step-by-step explanation:

x = Ky

18 = K(3)

K = 18/3 = 6

x = 6y

x = 6(7) = 42

5 0
4 years ago
Is the following relation a function? ​
Xelga [282]

Answer:

No

Step-by-step explanation:

It does not pass the vertical line test

I hope this helps you :)

-KeairaDickson

5 0
3 years ago
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