Question

1) 3 - 20u - 1) > 8 + u; 2) 5(a + 2) + 14 < 6 - u;5) 3(2u + 1) > 5u - 1);6) 5-2) +7.6.​

Answer 1

Ответ:

Пошаговое объяснение:

1) 3-20u-1>8+u

2-20u>8+u

20u+u<2-8

u<-6/21

u<-2/7

u∈(-∞; -2/7)

2) Ошибка: a(?). Скорее всего: u.

5(u+2)+14<6-u

5u+24<6-u

5u+u<6-24

u<-18/6

u<-3

u∈(-∞; -3)

4) 6-5y>3y-2

5y+3y<6+2

y<8/8

y<1

y∈(-∞; 1)

5) 3(2u+1)>5u-1

6u+3>5u-1

5u-6u<3+1

-u<4

u>-4

u∈(-4; +∞)

6) Ошибка: 5-2) +7.6.(?)

Answer 2

It seems like you've written a series of mathematical inequalities. I'll solve each one for you:

1. 3 - 20u - 1 > 8 + u

   First, let's combine like terms on both sides: 2 - 20u > 8 + u

   Next, let's isolate the variable u: -20u - u > 8 - 2

   -21u > 6

   Now, divide both sides by -21 (remember to reverse the inequality when dividing by a negative number): u < 6 / -21

   Simplify: u < -2/7

2. 5(a + 2) + 14 < 6 - u

   First, distribute the 5 on the left side of the inequality: 5a + 10 + 14 < 6 - u

   Combine like terms on both sides: 5a + 24 < 6 - u

   Now, isolate the variable a: 5a < 6 - u - 24

   5a < -18 - u

   Divide both sides by 5: a < (-18 - u) / 5

3. 3(2u + 1) > 5u - 1

   First, distribute the 3 on the left side of the inequality: 6u + 3 > 5u - 1

   Move the 5u term to the left side by subtracting 5u from both sides: 6u - 5u + 3 > -1

   Combine like terms: u + 3 > -1

   Now, isolate the variable u: u > -1 - 3

   u > -4

4. The expression "5-2)" appears to be incomplete or has a typographical error. Please provide a valid mathematical expression.

5. It seems like you've written "5-2)" again. Please provide a valid mathematical expression.

6. The expression "5-2) +7.6" also appears to be incomplete or has a typographical error. Please provide a valid mathematical expression.

If you have additional questions or need further clarification on any of these inequalities, please let me know.