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cestrela7 [59]
4 years ago
11

(x+10)°+(2x+20)°=180°. I need this solved with work fully shown.( step-by-step ). thanks.​

Mathematics
2 answers:
jek_recluse [69]4 years ago
8 0

Answer:

x = 50

Step-by-step explanation:

Given

(x + 10) + (2x + 20) = 180 ( remove the parenthesis )

x + 10 + 2x + 20 = 180, that is

3x + 30 = 180 ( subtract 30 from both sides )

3x = 150 ( divide both sides by 3 )

x = 50

Katen [24]4 years ago
6 0

Answer:

x°=50°

Step-by-step explanation:

(x+10)°+(2x+20)°=180° (remove parenthesis)

x°+10°+2x°+20°=180°

x°+2x°+10°+20°=180° (addition of variable with variable and constant with constant)

3x°+30°=180°

3x°=180°-30° (on the other side of equality 30 became negative)

3x°=150°

x°=150°÷3° (division by 3)

x°=50°

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C(1)=6<br> c(n)=c(n-1)-16<br> Find the 3rd term in the sequence
sveticcg [70]
C(1)=6
c(2)=c(2-1)-16=c(1)-16=6-16=-10
c(3)=c(3-1)-16=c(2)-16=-10-16=-26
8 0
4 years ago
Read 2 more answers
SOLVE FOR THE BASE
zheka24 [161]

Answer:

1-    10% of -80 is -8.  

2-    28 is 4% of 700.

3-   25% of a number is equal to 1/4 or 0.25 of it.

4-    13% of a number is equal to 0.13 of it.

5-    15 is 12.5% of 120.

Step-by-step explanation:

1. 10% of ________- 8

2.28 is 4% of _________

3.25% of ________

4.13% of______

5.15 is 12.5% of _____

To determine the missing numbers in the statements, the following calculations must be performed:

1-

10 = -8

100 = X

100 x -8 / 10 = X

-800 / 10 = X

-80 = X

Therefore, 10% of -80 is -8.

two-

4 = 28

100 = X

100 x 28/4 = X

2800/4 = X

700 = X

Therefore, 28 is 4% of 700.

 

3-

25% of a number is equal to 1/4 or 0.25 of it.

4-

13% of a number is equal to 0.13 of it.

5-

12.5 = 15

100 = X

100 x 15 / 12.5 = X

1500 / 12.5 = X

120 = X

Therefore, 15 is 12.5% of 120.

4 0
3 years ago
You ride your bike x miles per hour up a mountain for 45 minutes. On the way down the mountain, you ride your bike 3 miles per h
denpristay [2]

Answer:

18/5 miles

Step-by-step explanation:

let d be the mountain dist path

upward biking

x miles - 1 hr

d 45 mins

3x/4 = d

riding down

x+3 - 60 min

d. - 20

(1/3)(x+3) = d

(x+3)/3 = 3x/4

4x+12 = 9x

x = 12/5

d =( 12*3)/(4*5)= 9/5

upward+downward = 2*(9/5) = 18/5

7 0
3 years ago
7x+3-2x if x =8 show me the work for this problem
Natalija [7]
To answer 7x + 3 - 2x you would first have to substitute x with 8.

7(8) + 3 - 2(8) =

Then you’d follow through and correctly use BEDMAS/PEDMAS to complete the equation.

7(8) + 3 - 2(8)=
56 + 3 - 16=
59 - 16=
= 43

Hopefully this helped
6 0
4 years ago
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