Question

1) 0,5x + 41,5 < 42; 2) 90 - 91; 3) x - 15< 20; 4) 180,2a + 18; 5) 31 - 4r> 2; 6)30,08 -1,92​

Answer 1

Пошаговое объяснение:

1.x<42

2.-1

3.x<35

4

5.4r<29

6.28.16

Answer 2

Ответ:

1)0,5х<-41,5

х<-83

2)90-91=-1

3)х<35

4)180.2а+18,5

5)-4r>2-31

-4r>-29 r<29:4, r<7,25

6)30,08-11,92=28,16

Answer 3

Let's solve each of these equations or inequalities step by step:

1. 0.5x + 41.5 < 42: Subtract 41.5 from both sides to isolate x: 0.5x < 42 - 41.5 0.5x < 0.5

Now, divide both sides by 0.5 to solve for x: x < 0.5 / 0.5 x < 1

So, the solution is x < 1.

2. 90 - 91: Simply subtract 91 from 90: 90 - 91 = -1

3. x - 15 < 20: Add 15 to both sides to isolate x: x < 20 + 15 x < 35

The solution is x < 35.

4. 180.2a + 18: This is not an equation or inequality, but rather an expression. To simplify it, just leave it as it is: 180.2a + 18

5. 31 - 4r > 2: Subtract 31 from both sides to isolate -4r: -4r > 2 - 31 -4r > -29

Now, divide both sides by -4, but remember to reverse the inequality sign because you're dividing by a negative number: r < (-29) / (-4) r < 29/4

So, the solution is r < 29/4.

6. 30.08 - 1.92: Simply subtract 1.92 from 30.08: 30.08 - 1.92 = 28.16