How to solve the equation of 9.72-x = 1 6 / 1 + 0.9

How to solve the equation of 9.72-x = 1 6 / 1 + 0.9

9.72-x=16/(1+0.9)
972/100-X=160/19
X=972/100-160/19
X=617/475≈1.2989

How to solve the equation x + 3.5 = 9
The topic of grade five in primary school should not be too complicated
x+3.5x=9.9

x+3.5x=9.9
1x+3.5x=9.9
(1+3.5)x=9.9
4.5x=9.9
x=9.9÷4.5
x=2.2

Solving exponential equation: 4 * 9 ^ x-3 * 15 ^ x = 25 ^ x

Answer: 4 * 9 ^ x-3 * 15 ^ x = 25 ^ X4 * 3 ^ (2x) - 3 * (5 ^ x) * 3 ^ x = 5 ^ (2x) (5 ^ x) ^ 2 + 3 * (5 ^ x) * (3 ^ x) - 4 * (3 ^ x) ^ 2 = 0 (5 ^ x-3 ^ x) (5 ^ x + 4 * 3 ^ x) = 0 because: 5 ^ x > 0,3 ^ x > 0, so: 5 ^ x-3 ^ x = 0, so: 5 ^ x = 3 ^ x, so: (5 / 3) ^ x = 1, so: x = 0

1. The solution of equation 5 ^ (x + 1) = 3 ^ (x ^ 2-1) is?
2. What is the solution set of equation 3 * 5 ^ (x + 2) = 5 * 3 ^ (x ^ 2)?

(x+1)lg5=(x^2-1)lg3
(x+1)lg5=(x-1)(x+1)lg3
(x+1)[lg5-(x-1)lg3]=0
X = - 1 or lg5 - (x-1) Lg3 = 0
x-1=lg5/lg3
So there are two solutions
x=-1
x=log(3)5+1=log(3)15
5^(x+2)/5=3^(x^2)/3
5^(x+1)=3^(x^2-1)
That's the equation above

Calculate the surface area of each cylinder below. (unit: cm)
1. A cylinder with a diameter of 12
2. A cylinder with a radius of 10
2. Beibei makes a pen holder. She wants to stick colored paper on the side and bottom of the pen holder. At least how many square centimeters of colored paper do she need? (cylinder, diameter 8)

1.3.14×12×16+3.14×（12÷2）²×2=828.96cm²
2.3.14×10×2×15+3.14×10²×2=1570cm²
3.3.14×8×13+3.14×（8÷2）²=376.8cm²

(common factor and greatest common factor 33
To cut a piece of rectangular white paper 12 cm long and 8 cm wide into a square, the side length of the square should be as large as possible, and there should be no surplus. Question: (1) how long is the maximum side length of a square? (2) how many squares can be cut into?

Let the longest side length of a square be x, and it can be cut into n such squares. Because there is no surplus, the sum of all square areas is equal to the area of a rectangle, so there are: n * x * x = 12 * 8 = 96, where n is a natural number, then x * x = 96 / N, n = 1,2,3,4... When n is smaller, X is larger, so try n = 1,2,3,4... In turn

If the area ratio of two similar triangles is equal to the perimeter ratio, the two triangles must be equal________ .
Fast and efficient

If the area ratio of two similar triangles is equal to the perimeter ratio, the two triangles must be congruent

Given that the least common multiple of two numbers is 240 and the greatest common divisor is 20, and knowing that one of them is 80, find another number

240 / 20 = 12; 80 / 20 = 4; 12 / 4 = 3; 20 * 3 = 60; so the answer is 60

Given that the slope of line L1 is a, L1 ⊥ L2, then the slope of L2 is a

If two straight lines are perpendicular to each other, the product of their slopes is - 1. (of course, only when the slopes of both lines exist)
So the slope of L2 is - 1 / A

perhaps there is enough food_____ a monster.a.for feed b.to feeding c.feed d.to feed
Which one

D.
Here is the infinitive table
If you don't understand, you can continue to ask me