Question

(d-2c)-(4c-2d)=? c=7/8 d=2,75

Answer 1

Ответ: d-2*c-4*c+2*d=3*d-6*c. Для данны Знвчений 3*2,75-6*7/8=8,25-42/8=8,25-21/4=8,25-5,25=3. Здесь 1/4=25/100=0,25.

Ответ 3.

Объяснение:

Answer 2

Let's substitute the values of c and d into the given expression and calculate:

Expression: (d - 2c) - (4c - 2d)

Given values: c = 7/8, d = 2.75

Substitute the values: = (2.75 - 2 * (7/8)) - (4 * (7/8) - 2 * 2.75)

Now perform the calculations step by step:

= (2.75 - 14/8) - (28/8 - 5.5) = (2.75 - 1.75) - (3.5 - 5.5) = 1 - (-2) = 1 + 2 = 3

So, (d - 2c) - (4c - 2d) equals 3 when c = 7/8 and d = 2.75.