Ответ:
Объяснение:
1) y = -2x + 5
x = - 4 → y(-4) = (-2)*(-4) +5 = 8 +5 = 13
x = 3,5 → y(3,5) = (-2) * 3,5 + 5 = - 7 + 5 = - 2
x = 0 → y(0) = (-2) * 0 + 5 = 5
2)
y = 9 → 9 = -2x + 5 → 2x = 5 - 9 → 2x = - 4 → x = - 2;
y = -5 → - 5 = -2x + 5 → 2x = 5 + 5 → 2x = 10 → x = 5
y = 0 → 0 = -2x + 5 → 2x = 5 → x = 2,5
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Ответ:
Объяснение:
1) y = -2x + 5
x = - 4 → y(-4) = (-2)*(-4) +5 = 8 +5 = 13
x = 3,5 → y(3,5) = (-2) * 3,5 + 5 = - 7 + 5 = - 2
x = 0 → y(0) = (-2) * 0 + 5 = 5
2)
y = 9 → 9 = -2x + 5 → 2x = 5 - 9 → 2x = - 4 → x = - 2;
y = -5 → - 5 = -2x + 5 → 2x = 5 + 5 → 2x = 10 → x = 5
y = 0 → 0 = -2x + 5 → 2x = 5 → x = 2,5