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

Cot(90° − x) = 1 the value of x that satisfies this equation is °. a. 60 b. 135 c. 225 d. 315

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