help me to take the retake?

Answer:

Step-by-step explanation:

4ab(a-b)+b(2b-2a^2)

=4*1*-1[1-(-1)]+(-1){2(-1)-2*1^2}

=-4(1+1)-1{-2-2}

=-4*2-1(-4)

=-8+4

=-4

Answer:

by my calculations the answer is 10

Step-by-step explanation:

4×1(1-1)+1(2×1-4)

4+1(2-4)

5×2

10

Answer:

96.29  mm^3

Step-by-step explanation:

Cylinder

V = pi r^2 h

V = 3.14 ( 2)^2 ( 5)

V = 3.14 *4*5

V =62.8 mm^3

Cone

V = 1/3 pi r^2 h

V = 1/3 (3.14) 2^2 ( 4)

V =1/3 (3.14) 4*4

V =16.746666666 mm^3

There are 2 cones so multiply by 2

Both cones = 33.493333333333 mm ^3

Add the cones and the cylinder together

62.8+33.493333333 =96.293333333

Rounding to the nearest hundredth

96.29  mm^3

[tex]\huge\bold{Given:}[/tex]

Length of the perpendicular = 6 ft.

Length of the base = 8 ft.

[tex]\huge\bold{To\:find:}[/tex]

The length of the missing side.

[tex]\large\mathfrak{{\pmb{\underline{\orange{Solution}}{\orange{:}}}}}[/tex]

[tex]\longrightarrow{\purple{x\:=\:10\:feet}}[/tex] 

[tex]\large\mathfrak{{\pmb{\underline{\red{Step-by-step\:explanation}}{\red{:}}}}}[/tex]

Let [tex]"x"[/tex] be the side of the hypotenuse.

Using Pythagoras theorem, we have

( Hypotenuse )² = ( Perpendicular )² + ( Base )²

[tex]\longrightarrow{\blue{}}[/tex] [tex] {x}^{2} [/tex] = ( 6 ft )² + ( 8 ft) ²

[tex]\longrightarrow{\blue{}}[/tex]  [tex]{x}^{2}[/tex] = 36 ft² + 64 ft²

[tex]\longrightarrow{\blue{}}[/tex]  [tex]{x}^{2}[/tex] = 100 ft²

[tex]\longrightarrow{\blue{}}[/tex]  [tex]x[/tex] = [tex] \sqrt{100 \: {ft}^{2} } [/tex]

[tex]\longrightarrow{\blue{}}[/tex]  [tex]x[/tex] = [tex] \sqrt{10 \times 10 \: {ft}^{2} } [/tex]

[tex]\longrightarrow{\blue{}}[/tex]  [tex]x[/tex] = [tex] \sqrt{ ({10 \: ft})^{2} } [/tex]

[tex]\longrightarrow{\blue{}}[/tex]  [tex]x[/tex] = 10 ft.

Therefore, the length of the missing side [tex]x[/tex] is 10 feet.

[tex]\huge\bold{To\:verify :}[/tex]

[tex]\longrightarrow{\green{}}[/tex] ( 10 ft )² = ( 6 ft )² + ( 8 ft ) ²

[tex]\longrightarrow{\green{}}[/tex] 100 ft² = 36 ft² + 64 ft²

[tex]\longrightarrow{\green{}}[/tex] 100 ft² = 100 ft²

[tex]\longrightarrow{\green{}}[/tex] L.H.S. = R. H. S.

Hence verified. ✔

[tex]\huge{\textbf{\textsf{{\orange{My}}{\blue{st}}{\pink{iq}}{\purple{ue}}{\red{35}}{\green{☂}}}}}[/tex]

Answer:4

Step-by-step explanation:

Answer:

1/1.27

Step-by-step explanation:

Answer:

a = 8,059.52 m²

Step-by-step explanation:

Area of square

a = s²

a = 56²

a = 3,136

--------------------

Area of circle

a = πr²

a = 3.14(56/2)²

a = 2,461.76

Area of 4 semicircles = area of 2 circles

a = 2,461.76 * 2

a = 4,923.52

-----------------------

Total area

a = 3,136 + 4,923.52

a = 8,059.52 m²

Answer:

135°

Step-by-step explanation:

Choose the inside scale

Answer:

m∠B = 76°

Step-by-step explanation:

[tex]\frac{sinB}{b}=\frac{sinC}{c}\\\\sinB=\frac{sinC}{c}(b)\\\\B=sin^{-1}(\frac{sin(29)}{9}(18))\\\\B=75.8=76[/tex]

Therefore, m∠B = 76°.

Answer:

B 10.8 or

A 9.2 depending on what side of the triangle is "x".

Step-by-step explanation:

we cannot see the triangle and which side is which. you forgot to show us the picture (or describe it in more detail).

but I assume that "x" would be the Hypotenuse (the baseline of the right triangle, the side opposite of the 90 degree angle).

then by using Pythagoras

c² = a² + b²

=>

x² = 10² + 4² = 116

x = sqrt(116) = 10.8

but if x is any of the other sides (and not the Hypotenuse), then you need to adapt the calculation.

for example, if the Hypotenuse is the side with 10, then Pythagoras' formula would look like this

10² = x² + 4²

x² = 10² - 4² = 84

x = sqrt(84) = 9.2 (and answer A would be correct).

or if the Hypotenuse is the side with 4, then

4² = x² + 10²

x² = 4² - 10² = -84

x = sqrt(-84)

and that did not make any sense for real distances. so, this configuration is actually impossible for a right triangle.

Answer:

c).    14 < x < 15

d).    7 < x < 8

Step-by-step explanation:

c).   (x/3)^3 = 124

Take the cube root of both sides

x/3 = 4.986630952238646

multiply both sides by 3

x = 14.959892856715938

14 < x < 15

-----------------------------

d). (x/2 - 1)^3 = 25

Take the cube root of both sides

x/2 - 1 = 2.924017738212866

Add 1 to both sides

x/2 = 3.924017738212866

multiply both sides by 2

x = 7.848035476425732

7 < x < 8

: D. Chemical energy is transformed to light and thermal energy

Answer:

6%

Step-by-step explanation:

8,500(x) = 510

x = 510/8,500

x = 0.06

x = 6%

Answer:

(ab) = 6

Step-by-step explanation:

a = 2 and b = 3

So, (2(3)) or 2 x 3 = 6

Answer:

$40

Step-by-step explanation:

Ariana spent a quarter of her allowance

1 - 1/4 = 3/4 was left

put one third of the remainder in her piggy bank

1/3 * 3/4 = 1/4

She spent 1/4 and piggy banked 1/4

so the $20 she had left was half her allowance.

allowance was $40

Ariana gets a very large allowance!

Answer:

DE ≈ 16.1, ∠E ≈ 60.3°, ∠D ≈ 29.7°

Step-by-step explanation:

use pythagorean theorem:

DE² = 8² + 14² => DE = √8² + 14² ≈ 16.1

use inverse tangent function:

∠E =  [tex]tan^{-1}[/tex](14/8) ≈ 60.3°

∠D =  [tex]tan^{-1}[/tex](8/14) ≈ 29.7°

Answers:

The "units" and "degrees" portions of the answers are likely to be left out.

===============================================

Explanation:

Since we have a right triangle, we can use the pythagorean theorem to find the hypotenuse DE

a^2+b^2 = c^2

c = sqrt(a^2+b^2)

c = sqrt(8^2+14^2)

c = 16.124515496597

c = 16.1 is the approximate length of side DE

----------------------------------

We'll use the tangent ratio to find angle E

tan(angle) = opposite/adjacent

tan(E) = FD/FE

tan(E) = 14/8

E = arctan(14/8)

E = 60.2551187030578

E = 60.3 degrees

The notation arctan is the same as inverse tangent. You should have a [tex]\tan^{-1}[/tex] button on your calculator to help compute the inverse tangent.

-------------------------------------

We could use the tangent ratio to solve for angle D, by noting that

tan(D) = 8/14

or we could use the idea that D+E = 90 which solves to D = 90-E

D = 90-E

D = 90-60.3

D = 29.7 degrees

Note how arctan(8/14) = 29.74488 which rounds to 29.7

[tex] 4 {x}^{2} + 20x + 16[/tex]

Step-by-step explanation:

[tex](2x + 8)(2x + 2) \\ = 2x(2x + 2) + 8(2x + 2) \\ = 4 {x}^{2} + 4x + 16x + 16 \\ = 4 {x}^{2} + 20x + 16[/tex]

[tex]\large\mathfrak{{\pmb{\underline{\orange{Happy\:learning }}{\orange{!}}}}}[/tex]

Answer:

[tex]n = 100[/tex]

Step-by-step explanation:

Isolate the variable by dividing each side by factors that don't contain the variable

Answer:

Step-by-step explanation:

We don't have any statements from which to choose, but I did ind a couple of things that might be useful to you. Solving the system simultaneously for a, b, and c gives back a quadratic that is [tex].2x^2-2x+4.2=y[/tex] and it has a vertex of (5, -.8). It opens upwards and is very wide open, which means that its vertex is a minimum. It has real zeros of x = 7 and x = 3, and a y-intercept of (0, 4.2). Not sure what else there is to tell you so hopefully I covered something of importance!

d

Step-by-step explanation:

s=(axh)/2

Answer:

Step-by-step explanation:

1/2 base times height.

Answer:

Step-by-step explanation:

A)0.000421m^2

C)25000L^2

B)9300000g^2

D)0.001439km^2

Answer:

its actually d

Step-by-step explanation:

it compares height to time

should be (5,-5) just because its in the 5 then when its going down its -5

Answer:

Standard error of the mean: 1.91

Step-by-step explanation:

The standard error of a sample mean is [tex]SEM=\frac{\sigma}{\sqrt{n}}[/tex] where [tex]\sigma[/tex] is the sample standard deviation and [tex]n[/tex] is the sample size. Therefore, the standard error of the mean for a sample size of 175 is [tex]SEM=\frac{\sigma}{\sqrt{n}}=\frac{25.29}{\sqrt{175}}=1.911744304\approx1.91[/tex]

Answer:

Step-by-step explanation:

circumference=2πr

=2*3.14*20

=125.6 inches

The circumference of the tire is 125.6 inches.

We have given that,

A tire has a radius of 20 inches.

We have to determine the circumference of the circle

C=2πr

C=circumference

r=radius of the circle

Use this value in the circumference of the circle

Therefore we get,

=2*3.14*20

=125.6 inches

Therefore the circumference of the tire is 125.6 inches.

To learn more about the circumference of the circle visit:

https://brainly.com/question/20489969

#SPJ2

Answer:

90

First, divide: 75/25=3

Last 3x 30= 90

or

  30

x 3

--------

90

Answer:

what ever sides are multiply the points by 2 each (x time 2, y times 2) Best I got. Hope this helps some

Step-by-step explanation:

figure out the sides then:

Ex. Perform a Dilation of 4 on point A (2, 3) which you can see in the picture below. Multiply the coordinates of the original point (2, 3), called the image, by 4. Image's coordinates = (2 * 4, 3 * 4) to get the coordinates of the image (8, 12).

Since this is the area x 2, multiply 84x2