So I got some math HW Instructions: solve the following systems using elimination
1. 3x-10y=14 and 3x-9y=15
2. 4x+2y=6 and -2x+2y=18
3. 4x+9y=5 and -4x+7y=11
4. 10x-3y=18 and -2x+3y=6
5. x=3y+11 and 2x-3y=16
6. x-y=10 and 3x+y=18
7. 7x+7y=28 and 7x+10y=22
8. 4y=2x-8 and 5x-4y=20

I really need help with this, please respond a. s.a. p. with work

step-by-step explanation:

a

step-by-step explanation:

correct answer is b. 27/8

step-by-step explanation:

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.