In a school, 55% of the pupils are girls. Out of the girls, the ratio of ones with blonde hair to ones with brown hair is 2:3. What percentages of pupils are blonde girls?

Answer:

B

Step-by-step explanation:

Im not quite sure but i think it is b i hopeitcan help you!

Answer:

b= (2a+11)/5

Step-by-step explanation:

5x + 2y = 9

2y=9-5x

y= 9/2 - 5x/2

slope, m1= -5/2

for perpendicularity, m1 × m2 = -1

slope for QR= m2=

[tex] = - 1 \div \frac{ - 5}{2} = - 1 \times \frac{2}{ - 5} = \frac{ - 2}{ - 5} = \frac{2}{5} [/tex]

m2 is 2/5

[tex]qr = \frac{b - 3}{a - 2} [/tex]

[tex] \frac{2}{5} = \frac{b - 3}{a - 2} [/tex]

5(b-3)=2(a-2)

5b-15=2a-4

5b=2a-4+15

5b= 2a+11

[tex]b = \frac{2a + 11}{5} [/tex]

An expression for b in terms of a is b = (2a + 11)/5.

We know lines have various types of equations, the general type is

Ax + By + c = 0, and the equation of a line in slope-intercept form is

y = mx + b.

Where slope = m and b = y-intercept.

the slope is the rate of change of the y-axis with respect to the x-axis and the y-intercept is the (0,b) where the line intersects the y-axis at x = 0.

Given an equation of a line 5x + 2y = 9 ⇒ 2y = - 5x + 9 ⇒ y = (-5/2)x + 9/2.

So, the slope of the line parallel to QR is the slope negative reciprocal of (-5/2) which is (2/5).

We know slope m = (b - 3)/(a - 2).

∴ (2/5) = (b - 3).(a - 2).

2(a - 2) = 5(b - 3).

2a - 4 = 5b - 15.

2a + 11 = 5b.

b = (2a + 11)/5.

learn more about lines and slopes here :

https://brainly.com/question/3605446

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Answer:

0.25, 4/5, 1/3, 1.9 and you answer mine please

Answer:

-1.9,-1 4/5, -1/3, 0, .25

Step-by-step explanation:

12£ and 42£

Step-by-step explanation:

gethin gets 2/9

David gets 7/9

total money is equal to 54

Gethin gets 54x 2/9=12

David gets 54x7/9=42

Answer:

14

Step-by-step explanation:

Answer:

x=-10, y=-20

Step-by-step explanation:

first you substiture the y in the second equation with the first

x-2x=10

then solve

1x-2x=-1

-x=10

multiply both sides by a negative to make the varible a

positive

x=-10

now we substitue the x in the first equation with -10

y=2(-10)

y=-20

Answer:

you got two apple left I hope this helps

Answer:

96.406 :)

Step-by-step explanation:

Answer:

calculator

Step-by-step explanation:

i

Answer:

x = [tex]\sqrt{10}[/tex]

Step-by-step explanation:

The 2 right triangles and the outer right triangle are similar, then ratios of corresponding sides are equal, that is

[tex]\frac{x}{5}[/tex] = [tex]\frac{2}{x}[/tex] ( cross- multiply )

x² = 10 ( take the square root of both sides )

x = [tex]\sqrt{10}[/tex]

Answer:

√10

Step-by-step explanation:

taking the smallest triangle;

y as the hypotenuse, x as the adjacent side, 2 as the opposite side

then: y²=x²+2²

x²=y²-2²= y²-4

taking the other triangle;

z as the hypotenuse, x as the adjacent side, 5 as the opposite side

then: z²=x²+5²

x²=z²-5² = z²-25

take both equations,

x²= y²-4

x²= z²-25

y²-4= z²-25

y²= z²-25+4 = z²-21

taking the biggest triangle (whole triangle);

(5+2)= 7 as the hypotenuse, z as the adjacent side, y as the opposite side

then; 7²=z²+y²

z²+y²=7² =49

but y²= z²-21;

z²+y² =49

z²+ z²-21 =49

2z²-21=49

2z²=49+21= 70

z²= 70/2 = 35

take x²= z²-25

x²= 35-25 = 10

[tex]x = \sqrt{10} [/tex]

Answer:

$72

Step-by-step explanation:

im guessing

Answer:

Step-by-step explanation:

x + 2y = 8

x - y = 2

x + 2y = 8

-x + y = -2

3y = 6

y = 2

x - 2 = 2

x = 4

(4, 2)

Answer:

y=-3x+15

Step-by-step explanation:

Answer:

13 months, 49 cms

Explanation:

For Sasha, multiply 3 and 13 together for the growth per month. You should get 39, then add the 10 cm Sasha already has. The sum is 49.

For Maria, multiply 13 and 1 for the growth per month. You should get 13, then add the 36 Maria already has. The sum is also 49.

Hope this helps!

Answer:

edwin 14, gary 20

Step-by-step explanation:

Answer:

this isn't the answer to this but this is the answer to your other question, its -7.4, -4, 0.2, 1/2, 7.4

Step-by-step explanation:

Answer:

4. [tex]6\sqrt{3}[/tex]

6. [tex]\frac{2\sqrt{6} }{3}[/tex]

8. 23.78

Answer:

I think m is the length of ABCD Square

1. for every 4 APPLES there are 3 ORANGES

2. The ratio of ORANGES, to BANANAS is 1:2 / 3:6

3. The ratio of APPLES to BANANAS is 4 to 6

4. For every 1 orange, there are 2 bananas.

Hope this helped! :))

Answer:

1. slope = 2; y-intercept = 3

2. slope = [tex]\frac{-2}{3}[/tex]; y-intercept = 2

let me know if you need the math

Answer:

C) twice the radius

Step-by-step explanation:

the radius is half the diameter

expand by distributing

2x-8+5x+15

combine like terms to simplify

7x+7

30 because the max amount of plants is 30. so you would need 2 more on tomato nd 12 more on pepper

Answer:

D

Step-by-step explanation:

7x - 4 = -18            (add 4 to both sides)

7x = -14                  (divide both sides by 7)

x = -2

the answer is D

Answer: D. 20

Step-by-step explanation:

(4/5)(25/1)

= 100/5

=20

Answer:

down below

Step-by-step explanation:

36/ 6 = 6

real answer is 5.57

Answer: 1625

Step-by-step explanation:

From the question, we are informed that Joe makes a map of his neighborhood for a presentation and that the scale of his map is 1 inch: 250.

Then, it should be noted that a 6.5 inches would represent:

= 6.5 × 250

= 1625

The answer is 1625

Answer:

y = 2/3x -1

Step-by-step explanation:

since the slope is m=2/3 and the line is intersepting at negative 1

the equasion is as follow:

y = 2/3x -1

Good luck.

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