Question

2+3а; при а =4;-57-2в ; при b=-1,38c-9; при с=3;-24+5d; при d =-3;6

Answer 1

2+3а; при а =4;-5
2+3*4=14
2+3*(-5)= -13
7-2в ; при b=-1,3
7-2*(-1)=9
7-2*3=1
8c-9; при с=3;-2
8*3-9=15
8*(-2)-9= -25
4+5d; при d =-3;6
4+5*(-3)= -11
4+5*6= 34

Answer 2

To evaluate the given expressions, let's substitute the values of the variables and perform the calculations step by step:

1. For 2 + 3a when a = 4: Substitute a with 4: 2 + 3(4) = 2 + 12 = 14

2. For -57 - 2b when b = -1: Substitute b with -1: -57 - 2(-1) = -57 + 2 = -55

3. For -1.38c - 9 when c = 3: Substitute c with 3: -1.38(3) - 9 = -4.14 - 9 = -13.14

4. For -24 + 5d when d = -3: Substitute d with -3: -24 + 5(-3) = -24 - 15 = -39

Now, it seems there is a typo in the last expression you provided. The expression 6 does not involve any variables. If you clarify the expression, I'll be happy to help you with the calculation.