Question

1.-250:(-17+7)*4-8 2.130-84:(-11+5)*(-7) 3.-540:(45-36:(-4))*6 4 при каком значение а не имеет смысла выражение 200:((-66:11+4)*25-а)

Answer 1

250:(-17+7)*4-8=-43,4782608
1) 23
2)10,8695652
3) в ответе.
И т. Д.

Answer 2

To solve the expressions and find the value of "a" that makes the expression undefined, let's evaluate each of them step by step:

1. (-17 + 7) * 4 - 8 = (-10) * 4 - 8 = -40 - 8 = -48

2. 130 - 84 : (-11 + 5) * (-7) = 130 - 84 : (-6) * (-7) = 130 - (-14) * (-7) [Note: Division takes precedence over multiplication] = 130 - 98 = 32

3. -540 : (45 - 36 : (-4)) * 6 = -540 : (45 - (-9)) * 6 [Note: Division takes precedence over negation] = -540 : 54 * 6 = -540 : 324 = -1.666...

4. To find the value of "a" that makes the expression undefined: 200 : ((-66 : 11 + 4) * 25 - a)

   Let's simplify the inner expression first: (-66 : 11 + 4) = (-6 + 4) = -2

   Now, the expression becomes: 200 : (-2 * 25 - a)

   Simplify further: 200 : (-50 - a)

   For the expression to be undefined, the denominator must be equal to zero (division by zero is undefined). So, -50 - a = 0

   Solving for "a": a = -50

Thus, the expression does not have a meaningful value when "a" is equal to -50.