$$5.38 a) -2a(-7c); г) 5.(-п). (4m); б) 3b. (-9k); д) -0,5 (-4k) (0,3p); 5.38 Упростите выражение и подчеркните его коэффициент: r) ⇒m. 0,4n. (-52). (-1)? ж) - (-14c). )(-0,5 1 б) -7х (-0,8y); e) -0,65c(-20);

Краткое пояснение:

Необходимо упростить каждое выражение и определить его коэффициент. a) −2a ⋅ (−7c) = (−2) ⋅ (−7) ⋅ a ⋅ c = 14ac. Коэффициент: 14 б) 3b ⋅ (−9k) = 3 ⋅ (−9) ⋅ b ⋅ k = −27bk. Коэффициент: -27 в) −7x ⋅ (−0,8y) = (−7) ⋅ (−0,8) ⋅ x ⋅ y = 5,6xy. Коэффициент: 5,6 г) 5 ⋅ (−n) ⋅ (4m) = 5 ⋅ (−1) ⋅ 4 ⋅ n ⋅ m = −20nm. Коэффициент: -20 д) −0,5 ⋅ (−4k) ⋅ (0,3p) = (−0,5) ⋅ (−4) ⋅ 0,3 ⋅ k ⋅ p = 0,6kp. Коэффициент: 0,6 е) −0,6 ⋅ 5c ⋅ (−20) = (−0,6) ⋅ 5 ⋅ (−20) ⋅ c = 60c. Коэффициент: 60 ж) \(\frac{2}{7}z \cdot (-14c) = \frac{2}{7} \cdot (-14) \cdot zc = -4zc\). Коэффициент: -4 з) 1/7 ⋅ m ⋅ 0,4n ⋅ (−5z) ⋅ (−1 3/4) = 1/7 ⋅ 0,4 ⋅ (−5) ⋅ (−7/4) ⋅ m ⋅ n ⋅ z = 0,5mnz. Коэффициент: 0,5 и) \(\frac{5}{9}x \cdot (-\frac{2}{5}y) = \frac{5}{9} \cdot (-\frac{2}{5}) \cdot xy = -\frac{2}{9}xy\). Коэффициент: -2/9

Ответ: смотри решение выше