Which types of words are uncountable nouns It's not an example word

Which types of words are uncountable nouns It's not an example word

Categories include metals, gases, liquids and solids
Material Science

Subtract 18 from a number and multiply it by 9. The result is 54. What's the number

54÷9+18
=6+18
=24

Is one sixth of five meters equal to five sixth of one meter?

Yes ~!
One sixth of five meters is equal to five sixth of one meter

English and translation of unit 9 3a is fast. I lost my English book. Help me

I often go to the movies with my friend Mike. My favorite actor is Paul Jackson. He has a new movie [father's birthday]. It's a very funny comedy. Mike likes actor Rick Smith. He loves his movie [Black September]. It's a very successful horror movie, but I

Calculating the least common multiple of 12,18,24 by short division

You should have miscalculated. Short division only requires two numbers to have a common factor

Solution ratio: X: 0.5 is equal to 3 / 4: 1 / 4

0.5X3/4=x/4
x=0.5*3
x=1.5

It is known that in the triangle ABC, ∠ ABC = 3 ∠ C, ad is the bisector of ∠ BAC, be ⊥ ad is in E, and be = half (ac-ab) is proved

Extending the intersection of be and AC to F. AE is not only the bisector of ∠ BAC, but also the height of triangle ABF, so triangle ABF is isosceles triangle. AF = AB, BF = 2be, ∠ ABF = ∠ AFB

Uncle Zhang has 120 chickens. The number of ducks is one fourth less than that of chickens. How many ducks are there?

120*（1-1/4）
=120*3/4
=90
There are 90 ducks

Make the image of the function y = | x + 3 | - | x + 1 |, and write the value range according to the image

1. Direct method: point, two points, - 3, - 1, discuss in three sections, transform into a piecewise function, and then draw a picture
2. Image transformation method: the second method is to draw the images of | x + 3 | and | X-1 | and then subtract them

Given a + B = 3, the square of a * B + the square of AB = - 30, find the direct formula of the square of a + the square of B
Yes, brother and sister, please help me. I kneel down for you

According to the meaning of the title
a+b=3
ab(a+b)=-30
therefore
ab=-30/3=-10
And because
（a+b)＾2=9
a＾2+2ab+b＾2=9
a＾2+b＾2=9-2ab=9+2*10=29