Question

2(7−3y)+4(9−y)≤60 . y≥−11 y≤−11 y≥−1 y≤11 y≤−1

Answer 1

Ответ:

y >= -1

Объяснение:

2(7−3y)+4(9−y)≤60

14-6у+36-4у<=60

-10y+50<=60

-10y<=60-50

-10y<=10

   y >= -1     знак меняется

Answer 2

To find the valid range of values for y that satisfies the given inequality 2(7−3y)+4(9−y)≤60, we need to solve the inequality along with the given constraints y≥−11, y≤−1, and y≤11.

First, let's simplify the inequality: 2(7 - 3y) + 4(9 - y) ≤ 60 14 - 6y + 36 - 4y ≤ 60 50 - 10y ≤ 60 -10y ≤ 60 - 50 -10y ≤ 10 y ≥ -1 (Note: Multiplying by a negative number flips the inequality)

Now, we have two constraints on y:

1. y ≥ -11
2. y ≥ -1

Since y must satisfy both constraints, the valid range for y is y ≥ -1.

So, the correct answer is: y ≥ -1.