Calculation (1) 6 ／ 3.25 = × ／ 1 / 2 ＝

Calculation (1) 6 ／ 3.25 = × ／ 1 / 2 ＝

twelve-thirteenths

Calculate x ^ 2-4x + X-2 of 4 - 2x + 1 of 4 - 2x ^ 2-8 X-1

X ^ 2-4x + X-2 of 4 - 2x + 1 of 4 - 2x ^ 2-8 X-1
=(x-2)/(x-2)²-1/2(x+2)-(x-1)/2(x²-4)
=1/(x-2)-1/2(x+2)-(x-1)/2(x+2)(x-2)
=[2(x+2)-(x-2)-(x-1)]/2(x-2)(x+2)
=(2x+4-x+2-x+1)/2(x-2)(x+2)
=7/[2(x-2)(x+2)]

Calculation - 32 1 / 3 + 5 1 / 4 - 3 1 / 7 - 5 1 / 4 + 12 6 / 7

-32 1 / 3 + 5 1 / 4-3 1 / 7 1 / 5 1 / 4 + 12 6 / 7
=- 32 1 / 3 + (5 1 / 4-5 1 / 4) - 3 1 / 7 + 12 6 / 7
=-32 1 / 3 + 9 5 / 7
=-22 and 13 / 21

What is the plural of fox?

FOXes

In the acute angle △ ABC, ab = 12, BC = 12, s △ ABC = 70, find Tanc, and Sina

Let s △ ABC = 70, BC = 12, high ad = 10. In RT △ ADB, BD = 2 radical 11 is obtained by Pythagorean theorem, so CD = 12-2 radical 11. In RT △ ADC, AC = 2 radical 66-2 radical 11 is obtained by Pythagorean theorem, Tanc = ad / DC, SINB = sinc = ad / AC

Some children like f______ So, but some don't like it
Some children like f______ soup,but some don't like it.
C______ Are bad for your health if you eat too many

Some children like f (ISH fish) soup, but some don't like it
Some children like fish soup, but some don't
C (andies) are bad for your health if you eat too many
If you eat too much candy, it's bad for your health
Come on! If you don't understand, ask again! If it helps you, please take it, thank you!

Suppose that the lengths of two right angles of a right triangle are a and B, the height of the hypotenuse is h, and the length of the hypotenuse is C, then the shape of the triangle with C + H, a + B and h as sides is ()
A. Right triangle B. acute triangle C. obtuse triangle D. shape cannot be determined by the size of a, B, C

∵ a, B are the two right sides of a right triangle ∵ A2 + B2 = C2 and ∵ h is the height of the hypotenuse, C is the length of the hypotenuse ∵ ch = ab ∵ H2 + (a + b) 2 = H2 + A2 + B2 + 2Ab = H2 + C2 + 2CH, and (c + H) 2 = C2 + 2CH + H2 ∵ H2 + (a + b) 2 = (c + H) 2 ∵ triangle is a right triangle

Antonyms or equivalents in English
1 strict 2 active 3 red 4 different 5 expensive 6 behind 7 black
8 warm

relax
passive
black
the same
cheap
in front of
red
cool

Cosine theorem and solving triangle problem!
In the triangle ABC, let the opposite sides of angles a, B and C be a, B and C respectively. If a = b = π / 6 and the length of the middle line am on the side of BC is √ 7, then the area of triangle ABC is
Requirements: in addition to calculation, other steps must not jump!

Let AC = BC = 2x
From cosine theorem
7 = (2x) ^ 2 + (x) ^ 2-2 (2x) (x) cos120 degrees
=7x^2
x=1
AC=BC=2
S = (1 / 2) ac * BC * sin120 degrees
＝√3

Which words should be followed by original verbs in English sentences

1do
2have\had done
3doing
4to do,
5 let ,make,
6can,
7could,
8may,
9should,
10might,
11must,
12ought,
13need,
14have,
15let,
16make,
17help
18sb+do sth.
19LET
20be good as
21let
22make
23to
24should
25must
26can