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strojnjashka [21]
3 years ago
11

Find the value of X...................................................................

Mathematics
2 answers:
kogti [31]3 years ago
4 0
X=20
Combine like terms

brilliants [131]3 years ago
4 0

Answer and Step-by-step explanation:

To find the value of x, we must add together the two angles, and equal it to 180.

7x + x + 20 = 180

8x + 20 = 180

<u>Subtract 20 from both sides.</u>

8x = 160

<u>Now divide each side by 8.</u>

x = 20

<u>We get the result to be 20 = x.</u>

<u></u>

<u></u>

<u><em>#teamtrees #PAW (Plant And Water)</em></u>

You might be interested in
The answers too them
jasenka [17]

Answer:

$324.37

Step-by-step explanation:

First question already answered in other post.

Second Question:

Original price before discount and tax: $354

Discount: 15%

100% - 15% = 85% = 0.85

0.85 * $354 = $300.90

Tax: 7.8%

100% + 7.8% = 107.8% = 1.078

1.078 * $300.90 = $323.37

Answer: $324.37

5 0
3 years ago
Solve the equation by completing the square m^2+6m-77=-5
Grace [21]
Maybe you thought about this:
m^2+6m-77+5=0 => m^2+6m-72=0 => m^2+ 2*3*m+3^2-3^2-72=0
=> m^2+2*3*x+3^2= (m+3)^2 this is the complete square of the binomial, we will still keep it =>
(m+3)^2 -9 -72=0 => (m+3)^2 - 81 = 0 => (m+3)^2 - 9^2 = 0
Now we got the difference squares, it mean a^2 - b^2 = (a-b) (a+b)
In according to this => (m+3-9) (m+3+9) = 0 =>
(m-6) (m+12)=0 => m-6=0 or m+12=0 => m1=6 or m2= -12 !!!!
Are you satisfied with this solution?

6 0
3 years ago
Solve for the roots in the equation below. In your final answer, include each of the necessary steps and calculations. Hint: Use
AveGali [126]

Answer:   3

<u>Step-by-step explanation:</u>

x^3-27=0\\\\x^3=27\\\\\sqrt[3]{x^3}=\sqrt[3]{27}\\\\x=\sqrt[3]{3\cdot 3\cdot 3} \\\\x=3

6 0
3 years ago
V=1/3nr^2h ; solve for r
sertanlavr [38]

Answer: r=3v/2nh

Step-by-step explanation:

3 0
3 years ago
If 75% of a number is 255 and 20% of the same number is 68, find 95% of that<br> number.
Tanzania [10]

Answer:

75% may also be expressed as 75/100=3/4 or as 0.75 as needed.

 

Let x = the number

 

Translate:

 "if 75% of a number is 60"       means

     (75/100)  *  x      =  60            [the word "of" usually means multiply]

     (3/4) x = 60                           [reduce or just write it this way]

        x  = 60(4/3)                       [multiply both sides by  4/3]

        x = 80

Step-by-step explanation:

8 0
3 years ago
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