Solve the simultaneous equations below grap algebraically.
1. 4x - 5y = - 20 and 2x + y = 4
2. 2x - 3y = 2 and 5x + y = 5
3. x + 3y = 12 and 2x + y = 9
4. 3x - 5y = 4 and 2x - 3y = 7
5. 2x - 3y = 12 and x + 2y = 6
6. 2x + 3y = 12 and x-y-1=0
7. x + 2y = 4 and 2x -y-3-0
8. 2y - 5x = 7 and 4x + 3y + 24 =0​

answer is the third choice:

3x^5+4x^4+x^3+2x^2-10x-7=0

step-by-step explanation:

step-by-step explanation:

one of the most important purposes of surface treatment is to alter surface properties according to the requirement of specific applications. for example, hydrophobic coating has been utilized on windshield and eyeglasses. gold atom monolayer on substrate has become a popular surface bioconjugation strategy.  

47 - 90 = 43

43 - 180 = x

x = 137

80 the answer is 80

step-by-step explanation: