A middle school has 200 boys and 300 girls enrolled in the seventh-grade. The principal randomly selects 45 seventh-grade students to take a lunch survey. How many of the seventh-grade students selected for the survey should the principal expect to be boys?

Answers

Answer 1

Answer:18

Step-by-step explanation:

Given

The school has 200 boys and 300 girls

The ratio of boys and girls is 2:3

If 45 seventh grade students are selected then the ratio of boys and girls remain the same

suppose there are 2x boys and 3x girls, such that ratio is 2:3

[tex]\Rightarrow 2x+3x=45\\\Rightarrow 5x=45\\\Rightarrow x=9[/tex]

No of the boys are [tex]2x=2\times 9=18[/tex]

Answer 2

Answer:

18

Step-by-step explanation:

what the another person said


Related Questions

PLEASE HELP!! ASAP
The question is on the picture

Answers

the answer is the second option

Find the percentage change from
40 to 60.

Answers

Answer:

50%

thats the answer

A bag contains 20 pink candies, 8 red candies, and 12
green candies. Without looking, Sarah pulls out a piece of
candy. Which color of candy is least likely to be pulled
out?

Answers

Answer:

The red marbles.

Step-by-step explanation:

It is because Red has the least amount of marbles, therefore it is most likely for you to not pull out a red marble.

HELP giving brainlest and extra points

Answers

divide tomato genome and human genome and you'll get

= 0.3

standard form is

3 × 10-¹

Select all expressions that are
equivalent to
64 2/3

Answers

Answer: Here is every possibility

194/3 = 388/6 = 582/9

= 776/12 = 970/15 = 1164/18

= 1358/21 = 1552/24 = 1746/27

= 1940/30 = 2134/33 = 2328/36

= 2522/39 = 2716/42 = 2910/45

= 3104/48 = 3298/51 = 3492/54

= 3686/57 = 3880/60 = 4074/63

= 4268/66 = 4462/69 = 4656/72

= 4850/75 = 5044/78 = 5238/81

= 5432/84 = 5626/87 = 5820/90

= 6014/93 = 6208/96 = 6402/99

= 6596/102 =     6790/105 =      6984/108

= 7178/111  =  7372/114 = 7566/117

= 7760/120 = 7954/123 = 8148/126

= 8342/129 = 8536/132 = 8730/135

= 8924/138 = 9118/141         =       9312/144

= 9506/147 = 9700/150 = 9894/153

= 10088/156 = 10282/159 = 10476/162

= 10670/165 = 10864/168 = 11058/171

= 11252/174 = 11446/177 = 11640/180

= 11834/183 = 12028/186 = 12222/189

= 12416/192 = 12610/195 = 12804/198

= 12998/201 = 13192/204 = 13386/207

= 13580/210 = 13774/213 = 13968/216

= 14162/219 = 14356/222 = 14550/225

= 14744/228 = 14938/231 = 15132/234

= 15326/237 = 15520/240 = 15714/243

= 15908/246 = 16102/249 = 16296/252

= 16490/255 = 16684/258 = 16878/261

= 17072/264 = 17266/267 = 17460/270

= 17654/273 = 17848/276 = 18042/279

= 18236/282 = 18430/285 = 18624/288

= 18818/291 = 19012/294 = 19206/297

Step-by-step explanation:

HELP ASAP will give brainlist

Answers

You use 360 and then minus other numbers


Increase £3.20 in the ratio 2:3
Please show your working out (/formulae).​

Answers

Answer:

£4.80

Step-by-step explanation:

Total amount =  £3.20

Ratio = 2 : 3

Old : New = 2 : 3

3.20 : x = 2:3

[tex]\frac{3.20}{x}=\frac{2}{3}\\\\3.20*3=2*x\\\\\frac{3.20*3}{2}=x\\\\x = 1.60 *3\\[/tex]

x = £ 4.80

plssss do this!!!!! thanks

Answers

Answer:

4) SU = TU                    definition of a midpoint

5) ΔSVU ≅ ΔTWU        Side-Side-Side

6) ∠SVU ≅ ∠TWU        corresponding parts of congruent triangles are congruent

Step-by-step explanation:

What is the product of (x − 3) and (x + 7)? A. x^2 + 4x − 21 B. x^2 − 4x − 21 C. x^2 − 10x − 21 D. x^2 + 10x − 21

Answers

Answer: (x−3)(x+7)

Step-by-step explanation:

=(x+−3)(x+7)

=(x)(x)+(x)(7)+(−3)(x)+(−3)(7)

=x^2+7x−3x−21

=x^2+4x−21

Answer:

A. X^2+4x-21

Step-by-step explanation:

(x−3)(x+7)

=(x+−3)(x+7)

=(x)(x)+(x)(7)+(−3)(x)+(−3)(7)

=x2+7x−3x−21

=x2+4x−21

I hope this helps :) I got it CORRECT also i added the Steps if your teacher asked for steps :)

Factor fully. Pls help

Answers

Answer:

(2x+9)^2

Step-by-step explanation:

Factor the equation by using the perfect square rule: a^2+2ab+b^2=(a+b)^2 or a^2-2ab+b^2=(a-b)^2 depending on the trinomial

Plz answer I'll give brainliest

Answers

Answer:

900<x<1100

Step-by-step explanation:

The third side must be greater than the difference of the other two sides

10000- 1000 < 10x

9000< 10x

Divide by 10

9000/10 < x

900 < x

The third side must be smaller than the sum of the other two sides

10000+1000 > 10x

11000>10x

Divide by 10

11000/10>10x/10

1100>x

900<x<1100

pls help i give 25 points

Answers

Answer:

find the dirivitev

Step-by-step explanation:

Answer:

2b + 2c

35h + 15m

ef + eg

Step-by-step explanation:

you just individually multiply everything inside the parentheses by the number on the outside.

Help. Anyone. ......

Answers

I believe its 4/5 slope

Two lines that intersect and are not parallel

Answers

Answer:

Perpendicular

Step-by-step explanation:

"Two distinct lines intersecting each other at 90° or a right angle are called perpendicular lines."

Identify the area of the composite shape.
71 cm squared
98 cm squared
34 cm squared
56 cm squared

Answers

Answer:

Option (1)

Step-by-step explanation:

Area of the composite figure ABCDEFGH = Area of rectangle ABGH - Area of rectangle CDEF

Area of rectangle ABGH = Length × Width

                                         = 14 × 7

                                         = 98 cm²

Area of rectangle CDEF = 9 × (7 - 4)

                                        = 27 cm²

Area of the composite figure = 98 - 27

                                                = 71 cm²

Option (1) is the correct option.

Express the function.
f(x) = 2x² - 4x - 13
in the form f(x) = a(x + h)² + k​

Answers

Answer:

2(x-1)^2-15

Step-by-step explanation:

2x^2-4x=2(x-1)^2-2

insert that in:

f(x)=2(x-1)^2-2-13=2(x-1)^2-15

a=2,h=-1,k=-15

What is the slope of the line that passes through the points (-10, -8) and
(-8, -16)? Write your answer in simplest form.

Answers

first of all we have to find the slope


m = y₂-y₁ / x₂-x₁

m = -8 + 16 / -10 + 8

m = 8/-2

m = -4

y-y₁ = m (x-x₁)

y + 8 = -4 (x + 10)

y + 8 = -4x - 40

y = -4x -40 - 8

y = -4x -48

Which expression is equivalent to -6(3x-2/3)
-2x+9
-3x-6 2/3
-18x+12
-18x+4

Answers

Answer:

-18x+4

Step-by-step explanation:

you simply distribut the negative 6:

so -6 times 3x would be -18x

and -6 times -2/3 would be positive 12/3 or 4

18 entre 12 (división) Porfa respondan, mi ama me pega con la chancla si no lo hago,, es lo único que me faltam

Answers

Answer:

Step-by-step explanation:

18 dividido por 12 es 1.5 , esto se puede probar haciendo division larga o multiplicando 1.5 por 12

1.5 * 12 = 18

Espero que te haya ayudado la respuesta y que ahores el chancletazo.

A rectangular prism has a length of 6in, a height of 10in, and a width of 11in. What is its volume, in cubic in?

Answers

Answer:

660 cubic inches

Step-by-step explanation:

Volume = length x width x height

Volume = 6 x 11 x 10

Volume = 660 cubic in

please help me solve this. ill award brainliest! please just explain how to solve and what it should be. ​

Answers

Answer:

3 - that is if all of those say 7 because some have a line through and some dont.  

Step-by-step explanation:

Download photomath. You take a photo of the math problem and it gives the answer plus steps to solve.

URGENT:
M is the Centriod of DEF

Answers

Answer:

A

Step-by-step explanation:

2/3 the way so you would do 6 plus 3, because 3 is half of 6

75 kilometers in 5 minutes is how many per minute

Answers

Answer:

15

Step-by-step explanation:

75/5=15

15 is the answer you are looking for

6.) River C is 200 miles longer than River D. If the sum of their lengths is 5,550 miles,
what is the length of each river?

Answers

5,550 divided by 200 is 27.75

Answer:

River C: 2875, River D: 2675

Step-by-step explanation:

Subtract 200 from 5550. Then divide your  difference (5350) by 2 to get 2675. Add 200 to one of your 2675s to get river C's length.

Please help ASAP!
Two
angles, ZJ and ZK are supplementary. The measure of ZJ is (2x+5)°. The
measure of ZK is (3x-10)°. What is the measure of ZK?

Answers

Answer:

ZK = 95 degrees

Step-by-step explanation:

Supplementary angles are when the sum of 2 angles equals 180 degrees. Since ZJ and ZK are supplementary, we can add both of them to equal 180 degrees.

ZJ + ZK = 180

Our first objective: find the value of x

(2x + 5) + (3x - 10) = 180

2x + 5 + 3x - 10 = 180

Combine like terms

5x - 5 = 180

Add 5 to both sides to isolate variable x

5x = 175

Divide both sides by 5 to isolate variable x

x = 35

Plug in x value for ZK expression

3(35) - 10

Use PEMDAS

105 - 10

95

Complete the table of values for y = x2 – 2x.
(2 marks)
x – 2
-1 0 1
2
34
y
3 0
3
Submit Answer
Skip for Now

please fast

Answers

Answer:

8

-1

0

8

Step-by-step explanation:

Can someone answer this i don't understand it

Answers

Based on my understanding, it’d be 32 2/3 since you’d multiply based on what’s the chart, example being 4 times 8 and 4 times 1/6

its math again so sorry

Answers

Answer:

589

Step-by-step explanation:

Answer:

the answer i think is 103 centimeters

Step-by-step explanation:

Find the perimeter of the given figure, help please!

Answers

Answer:

22.5 cm

Step-by-step explanation:

P=2(6.75)+2(4.5)

P=13.5+9

The measures of two angles are 4x° and (2x + 12)°. What is the measure of the each angle if x = 13

Answers

Answer:

4x° if x=13

4(13)= 52°

2x+12 if x=13

2(13)+13= 38°

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