560=0.2a + 0.8b
550=0.25a + 0.75b
find a and b
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answer is a = -7520
Step-by-step explanation:
560 0.20+ 0.8 b
550 0.25a +0.75b
0.2a+ 0.8b = 660 0.2a +0.8b-560 0
2 (0.1a +0.4b-280) 20 0.19 +0.4b-880 =0
D. 25a + 0.75b = 550
10. 25a + 0.75b- 550 = 0
25 (0.19 + 0.36-22) 20 0.19 +0.3b-22 20
From eq and 0.1b = 258
0.19 0.4b = 280 0₁/9 + 0.3b = 22
b= 2580
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