Answer:
Step-by-step explanation:
5x+4y=-30 ....(1)
3x – 9y=-18....(2)
divid (2) by : 3
x -3y = -6 so x = 3y - 6....(*)
put this value for x in (1) : 5(3y - 6 ) +4y = - 30
15y - 30 +4y = - 30
19y = 0 so : y = 0 put this value in (*) : x = 3(0) - 6 .... x = - 6
5x + y = 3
y = 3 - 5x
Substitute this value into second equation,
8x + 5y = 7
8x +5(3 - 5x) = 7
8x + 15 - 25x = 7
-17x = 7 - 15
x = 8/17
Now, substitute it into first equation,
y = 3 - 5x
y = 3 - 5*8 / 17
y = 3 - 40/17
y = 11/17
In short, Your Answers would be: x = 8/17 & y = 11/17
Hope this helps!
Answer:
-6-b
Step-by-step explanation:
4(1-2b)+7b-10
Multiply what's in parantheses
4(1)=4
4(-2b)=-8b
4-8b+7b-10
Combine like terms
4-10 -8b+7b
-6-b
Hope this helps :)
No, because first of all 125 +36 + 24 should equal 180° not 185° because the area of a triangle always has an area of 180. Second, you don't even have to calculate anything because an isosceles triangle has two measures that are the same °∞° Hope this helps!
Answer:
well when you hear "union" you think 'joined' or 'together' since thats what it means, In a mathmatical set of numbers, union means that both of the sets are necessary for the equation to be true. I'm not sure what the sets are in this problem but in order to get "union" from anything, that means that when you checked for your domains, the values that you got had to be part of both the given sets