As shown in the figure, in the triangle ABC, ab = 7, AC = 6, BC = 8, the straight line of line BC moves along the Ba direction at the speed of 2 units per second, and always keeps parallel with the original position. When x seconds is recorded, the length of the straight line in the triangle ABC is y. try to write the functional relationship between Y and X

As shown in the figure, in the triangle ABC, ab = 7, AC = 6, BC = 8, the straight line of line BC moves along the Ba direction at the speed of 2 units per second, and always keeps parallel with the original position. When x seconds is recorded, the length of the straight line in the triangle ABC is y. try to write the functional relationship between Y and X

Y=-16/7X+8

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Sentence: sentence phrase: phrase: word

It is known that, as shown in the figure, Da ⊥ AC, EC ⊥ Ca, point B is on AC, DB ⊥ be, ab-ce, verify that △ abd is all equal to △ CEB

⊙ Da ⊥ AC, EC ⊥ AC, DB ⊥ be (known)
A = ∠ C = ∠ DBE = 90 ° (vertical meaning)
∵∠ ADB + ∠ DBA = 90, ∠ DBA + ∠ EBC = 90 °, ∠ BEC + ∠ EBC = 90 ° (two acute angles of RT triangle complement each other)
℅ ∠ ADB = ∠ EBC ∠ CEB = ∠ DBA (equivalent substitution)
In triangle ADB and triangle CBE
∠ ADB = ∠ EBC (proven)
DB = be (known)
∠ CEB = ∠ DBA (proven)
The triangle ADB congruent CBE (SAS)

The plural of French is French. Why is the plural of German German German?

It's just pure grammar

Given that the area of acute triangle ABC is 132, ab = 15, BC = 22, find the length of AC

S△ABC=1/2ABXBCsinB=132
sinB=4/5 cosb=3/5
AC^2=AB^2+BC^2-2ABxBCcosB
=15^2+22^2-2x15x22x3/5
=403
AC=√403

Foods___ Fruit and vegetables a like B like!

A like
Food like fruits and vegetables
It's obviously plural

The three sides of a right triangle are 3 meters, 4 meters and 5 meters respectively. How can we rotate a circle to form a cone with the largest volume? Why?
Can this question rotate along the 5-meter hypotenuse?

It can't rotate along the 5-meter hypotenuse
The volume of rotation along the side of 3 meters is the largest, because the volume formula of cone is area multiplied by height, where the area and the radius of the bottom are related by chance, so that 3 * 3 * 4 is less than 4 * 4 * 3

Near antonyms and adjectives in English
North, except me, next to, right, after school, East

This is a strange question. I'll just write what I know

The actual meaning of cosa in cosine theorem a ^ 2 = B ^ 2 + C ^ 2-2 * b * c * cosa is not clear, so let's talk about how to calculate it
I'm a sophomore in junior high school. I'm very interested in mathematics

CosA =（b^2+c^2-a^2）/2*b*c

How should the verb ing ending with W change

swim→swimming
The rules for verbs to become progressive are as follows:
Verbs end with a silent e, remove e, add ing; verbs end with EE, directly add ing, such as: agree → agree; see → see, end with a consonant letter + a vowel letter + a consonant letter, and the vowel does not read the letter itself, the last consonant letter is written double