When a < 5 is known, the solution set of the inequality ax ≥ 5x + A + 1 is______ ．

When a < 5 is known, the solution set of the inequality ax ≥ 5x + A + 1 is______ ．

From the inequality ax ≥ 5x + A + 1, we get (a-5) x ≥ a + 1. ∵ a < 5, ∵ a-5 < 0, ∵ divide both sides of the inequality (a-5) x ≥ a + 1 by the negative number (a-5), and the direction of inequality changes, that is, X ≤ a + 1a − 5. So the answer is: X ≤ a + 1a − 5

Ask math questions about circles
1. Use a rope to circle a circle with a diameter of 16 cm. If you circle it into a square, how many cm is the side length of the square?
2. There is a bicycle with a wheel diameter of 0.8 meters. If the wheel turns 1000 times per minute, how many kilometers can the bicycle run per minute?

1. Use a rope to circle a circle with a diameter of 16 cm. If you circle it into a square, how many cm is the side length of the square?
The rope is long
16 × 3.14 = 50.24 cm
What is the side length of a square
50.24 △ 4 = 12.56 cm
2. There is a bicycle with a wheel diameter of 0.8 meters. If the wheel turns 1000 times per minute, how many kilometers can the bicycle run per minute?
0.8 × 3.14 × 1000 = 2512m = 2.512 km

When points a and B are on the straight line Mn, ab = 11cm, the radii of ⊙ A and ⊙ B are 1cm, and ⊙ a moves from left to right at the speed of 2cm per second. At the same time, the radius of ⊙ B is also increasing. The relationship between the radius R (cm) and time t (seconds) is r = 1 + T (t ≥ 0)
1. Write the functional relationship between the distance d between AB and time t
There should be four situations. I only think of two,

(1) A is on the left side of B
When t = 5.5, d = 2t-11
(2) B is on the left side of a, d = 11 + 2T