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anonymous
 one year ago
A and B are vertical angles. If A = 4x  10 and B = 6x  30, find mA.
anonymous
 one year ago
A and B are vertical angles. If A = 4x  10 and B = 6x  30, find mA.

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Nnesha
 one year ago
Best ResponseYou've already chosen the best response.2vertical angles are equal

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0There is no picture.

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.2alright so a and b are vertical angles vertical angles share the same vertex dw:1434116295080:dw for example here ^^^ a = b c=d a and are vertical angles and c and d are vertical equal so they are equal to each other \[\huge\rm 4x10=6x30\] solve for x

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So when I solve 4x10 i get 2.5 and when i solve 6x30 i get 5.

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.2wait what ? how did you get 2.5 and why did you solve it separately ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I divided 10 by 4 & i got 2.5

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.2no no no! 4x MINUS 10 you can't divide by 10

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.2write all x value to the one side of equal sign and constant term to the other side *constant term (number without variable )

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.2\[\huge\rm 4x10=6x30\] subtract 4x both sides

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0There is a theorem that states two vertical angles are congruent, i.e. have the same angle measure. Thus A = B. Substituting in the values we have for A and B you get a linear equation that can be solved to find x. 4x  10 = 6x  30 10 = 2x  30 20 = 2x 10 = x Now that we know x, substitute back into the expression for A. A = 4x  10 = 4*10  10 = 40  10 = 30 mA = 30

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.2remember to cancel out addition === >opposite subtraction multiplication ===> opposite division

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.2so to cancel 4x from left side you should subtract 4x both sides :)

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.2dw:1434117089054:dw let me know what you get

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.2how did you get 20 please show your work so i can find your mistake :)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0dw:1434117408586:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0dw:1434117516941:dw

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.2alright thanks! and combine like terms are add or subtract coefficient of SAME varaible 6x30 < you can't subtract because 6 have x and 30 doesn't have x dw:1434117600094:dw there is NEGATIVE 30 at right side how would you move that to the left side ???

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.2add or subtract 30 both sides ?

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.2yep add 30 both sides dw:1434117716411:dw still... we have to isolate x so how would you cancel out 2 from the right side ?? :)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0dw:1434117733194:dw

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.2yep yep divide! you got it!! so x = ??

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.2yep now be careful x=10 but they want us to find A so substitute x value in this equation \[\large\rm A =4x10\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so the answer is A=10? lol i dont know

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.2nope x=10 you need mA so replace x by 10 A=4x10 and then solve for A

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.2\[\huge\rm A=4\color{green}{x}10\] plug in 10

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0dw:1434118220477:dw
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