HELPP! i don’t know this

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Percentage - In mathematics, a percentage is a number or ratio expressed as a fraction of 100. It is often denoted using the percent sign, "%"

we can substitute 40% for 0.4x and make an equation

[tex]x-0.4=90[/tex]

simplify

[tex]0.6x=90[/tex]

divide both sides by 0.6

[tex]x=150[/tex]

Answer:

See below.

Step-by-step explanation:

(2v+2)(3v-2)

6v²-4v+6v-4

6v²-2v-4

-hope it helps

(Also, I'm great at algebra, so let me know if you need anymore help.)

Step-by-step explanation:

2v (3v-2)+2 (3v-2)

6v^2-4v+6v-4

6v^2+2v-4

Answer:   39.25

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Work Shown:

d = diameter = 10

r = radius = d/2 = 10/2 = 5

A = area of a full circle

A = pi*r^2 = 3.14*5^2 = 78.5

Cut this in half to get the area of a semicircle (aka half circle)

(78.5)/2 = 39.25

This result is approximate.

what is 4,357.25 rounded to the second decimal

A:4,400

Answer:

a pair of glasses costs $17

a hat costs $21

Step-by-step explanation:

h = hat

g = glasses

3h + 4g = 123

1h + 3g = 66

multiply the 2nd equation by 3

3h + 9g = 198

negate everything in the 1st equation and add it to the 'new' 2nd equation

    3h  + 9g = 198

+  -3h  - 4g = -123

5g = 75

g = 15

substitute the 15 in either one of the 1st equations

1h + 3(15) = 66

h + 45 = 66

h = 66-45

h = 21

to check, substitute both g=15 and h=21 into BOTH 2 original equations.

Answer:

x = 7[tex]\sqrt{3}[/tex]

Triangle area formula: base * height * 1/2

We are given:

Base - 14 cm

Height - x

Using the pythagorean theroem (a^2 + b^2 = c^2) we can figure out the height.

We are given:

Side a - 14 / 2 = 7 cm

Side b - the height (x)

Side c - 14 (it's an equilateral triangle)

Now, substitute the given values:

7^2 + x^2 = 14^2

49 + x^2 = 196

x^2 = 147

x = [tex]\sqrt{147}[/tex]

x = 7[tex]\sqrt{3}[/tex]

Answer:

ok it is very hardest app

Answer:

answer attached

Step-by-step explanation:

answer attached

hope this helps!

Answer:

∠H = 137°

∠K = 76°

Step-by-step explanation:

The sum of the interior angles of a trapezoid = 360°

In a trapezoid, the angles on the same leg (called adjacent angles) are supplementary, meaning they add up to 180°

The legs are the non-parallel sides:  JK and HI

Therefore, 104 + ∠K = 180

⇒ ∠K = 180 - 104 = 76°

And, ∠H + 43 = 180

⇒ ∠H = 180 - 43 = 137°

Sum of two adjacent angles in trapezium equals 180°

[tex]\\ \tt\hookrightarrow <H+43=180[/tex]

[tex]\\ \tt\hookrightarrow <H=180-43[/tex]

[tex]\\ \tt\hookrightarrow <H=137[/tex]

And

[tex]\\ \tt\hookrightarrow <K+104=180[/tex]

[tex]\\ \tt\hookrightarrow <K=180-104[/tex]

[tex]\\ \tt\hookrightarrow <K=76°[/tex]

Answer:

90x8+3

Step-by-step explanation:

X2-12x+36 = 90.

X=

O x=6+3./10

O x=6+2/7

X= 123.22

O

x= 12+3/10

this is the answer hope it helps

Answer:

3x/(x-3) (x+1)

Step-by-step explanation:

Answer:

(8n/10)

8 × 5 = 40

40 ÷ 10 = 4

If both pairs of opposite sides of a quadrilateral are congruent then the quadrilateral is a parallelogram

Answer: (-1/2, 0) which is the same as saying (-0.5, 0)

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

Explanation:

The x coordinates of A and B are -2 and 1 respectively.

Add up those values to get -2+1 = -1

Then cut that result in half: -1/2 = -0.5

This is the x coordinate of the midpoint.

--------

Repeat for the y coordinates:

Add: 1 + (-1) = 0

Cut in half: 0/2 = 0

The y coordinate of the midpoint is 0

-------

Overall, the midpoint is located at (-1/2, 0) which is the same as writing (-0.5, 0). This is where the segment AB crosses the x axis.

Answer:

I am assuming any number in between these two, so let's just say 6,550.

Step-by-step explanation:

If you count up from 6,534, you will eventually get to 6,550. If you continue to count up, you will eventually reach 6,565 which is bigger than 6,550.

Answer:

Second expression and Last expression

Step-by-step explanation:

Second expression and Last expression

1. [tex](4x^2-9y^2)(4x^2-9y^2)[/tex]

[tex]4x^2(4x^2-9y^2)-9y^2(4x^2-9y^2)[/tex]

[tex]16x^4 -36x^2y^2 -36x^2y^2+81y^4[/tex]

[tex]16x^4 -72x^2y^2+81y^4[/tex]

2. [tex](4x^2-9y^2)(4x^2+9y^2)[/tex]

[tex]4x^2(4x^2+9y^2)-9y^2(4x^2+9y^2)[/tex]

[tex]16x^4+36x^2y^2-36x^2y^2-81y^4[/tex]

[tex]16x^4-36y^4[/tex]

3. [tex](4x^2+9y^2)(2x-3y)(2x-3y)[/tex]

[tex](4x^2+9y^2)(4x^2-6xy-6xy+9y^2)[/tex]

[tex](4x^2+9y^2)(4x^2-12xy+9y^2)[/tex]

[tex]16x^4-48x^3y+36x^2y^2+36x^2y^2-108xy^3+81y^4[/tex]

[tex]16x^4 -48x^3y+72x^2y^2-108y^3+81y^4[/tex]

4. [tex](4x^2+9y^2)(2x+3y)(2x+3y)[/tex]

[tex](4x^2+9y^2)(4x^2+6xy+6xy+9y^2)[/tex]

[tex](4x^2+9y^2)(4x^2+12xy+9y^2)[/tex]

[tex]16x^4+48x^3y+36x^2y^2+36x^2y^2+108xy^3+81y^4[/tex]

[tex]16x^4+48x^3y+72x^2^2+108xy^3+81y^4[/tex]

5. [tex](4x^2+9y^2)(2x+3y)(2x-3y)[/tex]

[tex](4x^2+9y^2)(4x^2-6xy+6xy-9y^2)[/tex]

[tex](4x^2+9y^2)(4x^2-9y^2)[/tex]

[tex]16x^4-36x^2y^2+36x^2y^2-81y^4[/tex]

[tex]16x^4-81y^4[/tex]

Hope this helps!

Answer:

800 mm^2

Step-by-step explanation:

(25+7)*(23+8) - 8*10 - 7*5 - 7*11

= 800 mm^2

Answer:

sorry but i can not see clearly sorry

Step-by-step explanation:

i am realy realy sorry :( :(

The answer is 28 or 504. My explanation....

ALRIGHT! So, it took me a little while to do it all.... since I wasn't really sure if it was already multiplied by 18 or not.

So the normal numbers in order from least to greatest,(because that's easier)

14, 18, 20, 28, 36, 58, 71.

The new numbers I multiplied by 18 are...

252, 324, 360, 504, 648, 1044, 1268.

When I put it like that you can clearly see the new median. 28 and 504!

Step-by-step explanation:

х-7=6 , х=13

2у-6=8 у= 7

А)

Answer:

14.997

Step-by-step explanation:

yea yeaaa i knowwww

Answer:

You would need 16 1/3 cups!

Step-by-step explanation:

I used an equation, but you could also use mental conversions! :

1/3c = 5 1/3

(1/3c)3 = (5 1/3)3 (multiply each side by 3 (3/1))

3c /3 = (48) /3 (divide each side by 3)

c = 16

:)

(c = cups!)

The requried number of 1/3 cups to make the recipe is 16.

The equation model is defined as the model of the given situation in the form of an equation using variables and constants.

here,
Measuring cup = 1/3
Recipe required number of cups = 5 1/3 of flour,
Let the number of 1/3 cups = x
1/3x = 5 1 / 3
x/3 = 16 / 3
x = 16

Thus, the requried number of 1/3 cups to make the recipe is 16.

Learn more about models here:
https://brainly.com/question/22591166
#SPJ2

If you would do this in whole number form, it'll be 40/7.

Answer:

3 5/7

Step-by-step explanation:

picture

Answer:

ok so x is how many she can buy so

4x≤25

x=6.26

so she can buy 6

Hope This Helps!!!

Answer: 1 13/15

Hope this helps!

Answer:

7:10

Step-by-step explanation:

…..

because boys number is 7 and girl number is 10 so