smonahan2023
25.10.2019 •
Mathematics
20 points
1.) what is the value of k?
11 = -3k - 22 - 8k
2.) what is the value of b?
-7.5(x-3) = 3.75
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Ответ:
1. k = 6.6
2.b = -11.25
Step-by-step explanation:
11 = -3k - 22 - 8k
11+22 = -3k - 22+22- 8k
33=-3k+8k
33/5= 5/5k
6.6=k
-7.5(x-3) = 3.75
-7.5x + 22.5 = 3.75
-7.5x + 22.5-22.5 = 3.75-22.5
-7.5x=-18.75
-7.5 / 7.5x=-18.75+7.5
x=-11.25
Ответ: