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Andreas93 [3]
3 years ago
5

30+x+20=180 in Angle Sum Theorem

Mathematics
1 answer:
Svetlanka [38]3 years ago
6 0

Answer:

Step-by-step explanation:

30+x+20=180

50+x=180

x=180-50=130

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What mathematicians helped to discover alternatives to euclidean geometry in the nineteenth century
Likurg_2 [28]

Answer:

Nikolai Lobachevsky and Bernhard Riemann

Step-by-step explanation:

Nikolai Lobachevsky (A russian mathematician born in 1792) and Bernhard Riemann (A german mathematician born in 1826) are the mathematicians that helped to discover alternatives to euclidean geometry in the nineteenth century.

7 0
3 years ago
If x = -6 and y = -2, evaluate the expression.<br> 3x - 10<br> y-5
Bond [772]
Is it
3x-10= 3(-6)-10= -28
Y-5= -2-5=-7
3 0
3 years ago
School is Tomorrow I need help
german

Answer:

is their any way I can get some more info on this problem


Step-by-step explanation:


6 0
3 years ago
Freddy’s savings account went from $520 to $321 after he purchased a new bike. What was the percent decrease?
Vinil7 [7]

Step-by-step explanation:

The bike cost $199 to get $199 you do a number line then label 520 then at the end label 321 so then you do -20 then -100 then -50 then -20 then -9. so now you add them up 20+100+50+20+9 which equals =199

so bike cost $199

then 520%×199= 1034.8

or 520%×321=1669.2

so the  percentage is 1669.2 or 1034.8 probably 1669.2 but they bot count.

5 0
3 years ago
The roots of the equation are 3 + 8i and 3 – 8i.
g100num [7]
Given that the roots of the equation x^2-6x+c=0 are 3+8i and 3-8i, the value of c can be obtained as follows;
taking x=3+8i and substituting it in our equation we get:
(3+8i)^2-6(3+8i)+c=0
-55+48i-18-48i+c=0
collecting the like terms we get:
-55-18+48i-48i+c=0
-73+c=0
c=73
the answer is c=73
3 0
3 years ago
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