There are 18 girls in a class and the ratio of the number of girls and boys in the class is 3:2. Find the number of boys.

Answers

Answer 1

Answer:

12

Step-by-step explanation:

Multiply to get the number of girls they've given you.

3 x 6 = 18 girls.

2 x 6 = 12 boys.

Answer 2

Answer:

Number of boys = 12

Step-by-step explanation:

Let the total number of children in the class be x

Number of girls = 18

Number of boys = x - 18

Ratio of girls and boys = 3 : 2

Sum of the ratio = 5

Find the value of x

[tex]\frac{3}{5 } \times x = 18\\\\3 \times x = 18 \times 5\\\\x = \frac{90}{3} = 30[/tex]

Therefore, total number of children in the class = 30

Hence number of boys  = x - 18 = 30 - 18 = 12


Related Questions

Find the values of the unknown angles marked with letters. 50 points!!!!!!!
a ?
b ?
c ?
d ?

Answers

Answer:

a = 115°, alternate interior angles are congruentb = 70°, same as abovec = 180° - 115° = 65°, angles forming a straight angle are supplementaryd = 180° - 70° = 110°, same as above

a=115°(Alternate interior angles)b=70°(Alternate interior angles

C:-

[tex]\\ \sf\longmapsto c+115=180[/tex]

[tex]\\ \sf\longmapsto c=180-115[/tex]

[tex]\\ \sf\longmapsto c=65°[/tex]

D:-

[tex]\\ \sf\longmapsto d+70=180[/tex]

[tex]\\ \sf\longmapsto d=180-70[/tex]

[tex]\\ \sf\longmapsto d=110°[/tex]

A parabola has x-intercepts at x=-3 and x=4. What the equation of the parabola?

Answers

Answer:

x² - x - 12 = 0

Step-by-step explanation:

Given the x- intercepts are x = - 3 and x = 4 , then the factors are

(x + 3) and (x - 4)

Expressing as a zero product

(x + 3)(x - 4) = 0 ← expand using FOIL

x² - x - 12 = 0

An 8 Foot ladder leans against a building. I'd the ladder makes an angle of 60° with the ground, how far up the wall does the ladder reach? Also, how far from the building is the base of the ladder? round to the nearest 10th

Answers

9514 1404 393

Answer:

up the wall: 4√3 ft ≈ 6.9 ftalong the ground: 4 ft

Step-by-step explanation:

The side ratios in a 30°-60°-90° triangle are 1 : √3 : 2. Since the hypotenuse of this triangle is 8 feet, the multiplier of these ratio values is (8 ft)/2 = 4 ft.

The triangle sides are ...

  4 ft : 4√3 ft : 8 ft

The ladder reaches 4√3 ≈ 6.9 ft up the wall. Its base is 4 ft from the building.

Ratios, Rates, and Percents
17:30
Question 16
Problem
Patricia traveled an average speed of 65 miles per hour for 4.5 hours and then traveled at an average speed of 60 miles per hour for 1.5 hours. What was the total distance in
miles that Patricia traveled during this time?

Answers

Answer:

382.5 :)

Step-by-step explanation:

took test

steps to describe an inscribed regular hexagon.

Answers

Answer:

many sides

unique shape

One dozen cookies cost $5.50. At that rate, how much does one cookie cost?

Answers

Answer:

0,458$

Step-by-step explanation:

First you have to divide 5.50 by 12 to get the price for one cookie after doing that you get $.458333333333333

Find the area of a triangle with legs that are: 16 m, 12 m, and 8 m.
O A. 16.4 m2
B. 54 m2
C. 46.5 m2
D. 38.2 m2

Answers

ans. 46.5m2......................

35\40 = 7\?

a. 5
b. 8
c. 1
d. 4

Answers

Answer:

b. 8

Step-by-step explanation:

Simplify the left side by dividing the top and bottom by 5

35/5 = 7

40 /5 = 8

7/8

Hey there!

35/40 = 7/x

Cross Multiply the fraction

35(x) = (7)(40)

→ 35x = 280

DIVIDE 35 to BOTH SIDES

35x/35 = 280/35

CANCEL out: 35/35 because that gives you 1

KEEP: 280/35 because that helps solve for the x-value

→ x = 280/35

x = 8

Therefore, your answer is most likely: 8 (Option B)

Good luck on your assignment and enjoy your day!

~Amphitrite1040:)

What is the answer of 603 x 42 , this question is multiply , it’s of my brother who is just in g-4 …… pls help if you know but teach by process

Answers

Answer:

25326

Step-by-step explanation:

please refer to the picture above

[tex]\tt{ \green{P} \orange{s} \red{y} \blue{x} \pink{c} \purple{h} \green{i} e}[/tex]


What is the value of m in the figure below? If necessary, round your answer to
the nearest tenth of a unit.

Answers

Answer:

Option D, 13.2

Step-by-step explanation:

m = √{7×(18+7)}

= √(7×25)

= 5√7

= 13.2 (rounded to the nearest tenth)

find formula of s in terms of a, b, cos(x)

Answers

Answer:

[tex]\displaystyle s = \frac{2ab\cos x}{a+b}[/tex]

Step-by-step explanation:

We want to find a formula for s in terms of a, b, and cos(x).

Let the point where s intersects AB be D.

Notice that s bisects ∠C. Then by the Angle Bisector Theorem:

[tex]\displaystyle \frac{a}{BD} = \frac{b}{AD}[/tex]

We can find BD using the Law of Cosines:

[tex]\displaystyle BD^2 = a^2 + s^2 - 2as \cos x[/tex]

Likewise:

[tex]\displaystyle AD^2 = b^2+ s^2 - 2bs \cos x[/tex]

From the first equation, cross-multiply:

[tex]bBD = a AD[/tex]

And square both sides:

[tex]b^2 BD^2 =a^2 AD^2[/tex]

Substitute:

[tex]\displaystyle b^2 \left(a^2 + s^2 - 2as \cos x\right) = a^2 \left(b^2 + s^2 - 2bs \cos x\right)[/tex]

Distribute:

[tex]a^2b^2 + b^2s^2 - 2ab^2 s\cos x = a^2b^2 + a^2s^2 - 2a^2 bs\cos x[/tex]

Simplify:

[tex]b^2 s^2 - 2ab^2 s \cos x = a^2 s^2 - 2a^2 b s \cos x[/tex]

Divide both sides by s (s ≠ 0):

[tex]b^2 s -2ab^2 \cos x = a^2 s - 2a^2 b \cos x[/tex]

Isolate s:

[tex]b^2 s - a^2s = -2a^2 b \cos x + 2ab^2 \cos x[/tex]

Factor:

[tex]\displaystyle s (b^2 - a^2) = 2ab^2 \cos x - 2a^2 b \cos x[/tex]

Therefore:

[tex]\displaystyle s = \frac{2ab^2 \cos x - 2a^2 b \cos x}{b^2- a^2}[/tex]

Factor:

[tex]\displaystyle s = \frac{2ab\cos x(b - a)}{(b-a)(b+a)}[/tex]

Simplify. Therefore:

[tex]\displaystyle s = \frac{2ab\cos x}{a+b}[/tex]

Use order of operations to solve the equation

Answers

Answer: 1/16 (Decimal: 0.0625)

Step-by-step explanation:

3^2−4

5−10

−|−16|

=

1/16

i am a decimal with 2 decimal places round me to the nearest tenth and I will be 7.6 What are the decimals that i might be?​

Answers

Answer:

The answer is below

Step-by-step explanation:

There are multiply answers, I am pretty these are the answers

7.55

7.56

7.57

7.58

7.59

Step-by-step explanation:

The decimal can be from 7.55-7.64

When the range of the decimal is from 1-4, 5-9 during rounding it then the value will change to 7.6

Like 7.64, 7.63,7.62,7.61 will be rounded off to 7.6

And 7.55,7.56,7.57,7.58,7.59 will be rounded off to 7.6 too

please click thanks and mark brainliest if you like :)

Helppppp pleaseeee !!!!!!!!!!

Answers

Step-by-step explanation:

the 60 preliminary published articles are a constant.

all the new articles are simply added to that to get the total number of published articles.

every months produces 12 more articles.

so,

m = 1 means a = 60 + 1×12 = 72

m = 3 means a = 60 + 3×12 = 60 + 36 = 96

m = 4 means a = 60 + 4×12 = 60 + 48 = 108

m = 9 means a = 60 + 9×12 = 60 + 108 = 168

Convert 300 grades to a radian measure

A=5pi
6
B=6pi
5
C=3pi
5
D=5pi
3

Answers

Answer:

5pi/3

Step-by-step explanation:

The conversion factor is pi/180

300 *pi/180 = 300pi/180 = 30pi/18  = 5pi/3

If B is the midpoint of line AC, AC = CD, AB = 3x+4, AC=11x-17, and CE = 49, find DE. (Show work)

Answers

Answer:

2(3x+4) = 11x-17

6x+8 = 11x-17

25=-5x

x=-5

11x-17

55-17

38

AC = 38

CD = 38

49-38 = 11

DE = 11

Let me know if this helps!

Solve the equation.

Distribute: 4-2(x+7) = 3(x+5)
Combine Terms: 4-2x-14 = 3×+15
-10-2×= 3×+15
+10 +10
_______________
-2× = 3× + 25
-3x -3x
___________________
-5× = +25
÷ -5 ÷ -5
_____________________
ANSWER : x = -5

Part 2 : What is the value of x for the given equation ?
4-2(×+7)=3(×+5)
ANSWER : × = -5 ​

Answers

Answer:

- 5

Step-by-step explanation:

Solve for x

4-2(×+7)=3(×+5)

We open the bracket :

4 - 2x - 14 = 3x + 15

Collect like terms

-2x - 3x = 15 + 14 - 4

-5x = 25

Divide both sides by - 5

-5x/-5 = 25 / - 5

x = - 5

I need help with this please :)

Answers

Answer:

C

Step-by-step explanation:

this is an arithmetic sequence (we add something from element to element).

"an" describes the salary during the nth year.

a1 = $3000

a2 = a1 + 600

a3 = a2 + 600 = a1 + 600 + 600 = a1 + (3-1)×600

an = a1 + (n-1)×600 = 3000 + (n-1)×600

so,

a15 = 3000 + (15-1)×600 = 3000 + 14×600 = $11400

Anyone who can help me with this?

Answers

Answer:

C

Step-by-step explanation:

We know that the first integer will be "l" so the second will be l + 1, third will be l + 2, fourth will be l + 3, and the fifth will be l + 4. The question says "the greatest is g" so that means that the fifth integer is the greatest meaning that is the value of g. Now that we know the value of g, we can substitute it into the equation they gave us and simplify.

l+(l+4)/2

2l+4/2

l + 2

Best of Luck!

Answer:

C

Step-by-step explanation:

say your 5 consecutive numbers are 6-10

if 6 is l and 10 is g then

6+10 over 2 equals 8

this proves that l+2 is correct since 6+2=8

Jamal uses factoring to find the zeros of the equation x2+4x−32=y. He concludes that the graph intersects the x-axis at x=−4 and x=8.

Which statement BEST explains whether Jamal is correct or incorrect?

A
Jamal is correct because x2+4x−32 is equivalent to (x+4)(x−8).

B
Jamal is correct because x2+4x−32 is equivalent to (x−4)(x+8).

C
Jamal is incorrect because x2+4x−32 is equivalent to (x−4)(x+8).

D
Jamal is incorrect because x2+4x−32 is equivalent to (x+4)(x−8).

Answers

Answer:

c)

Step-by-step explanation:

x^2+4x-32 = (x-4)(x+8)

hence,

(x-4)(x+8) = 0

x = 4 or x = -8

the graph intersects at 4 not -4

Jamal is incorrect because x2+4x−32 is equivalent to (x−4)(x+8). Option C is correct.

Jamal uses factoring to find the zeros of the equation x²+4x−32=y. He concludes that the graph intersects the x-axis at x=−4 and x=8.

What is simplification?

The process in mathematics to operate and interpret the function to make the function or expression simple or more understandable is called simplifying and the process is called simplification.

Here,
x²+4x−32=y
Let y = 0
x²+4x−32=0
x² + 8x - 4x - 32 = 0
x (x + 8) - 4 (x + 8) = 0
(x - 4)(x + 8) = 0

Thus, Jamal is incorrect because x2+4x−32 is equivalent to (x−4)(x+8). Option C is correct.

Learn more about simplification here:

https://brainly.com/question/12501526

#SPJ2

The temperature in Miami, Florida Is 22 degrees warmer than three times the temperature in Bangor, Maine. The temperature in Miami is 82 degrees. Write an equation to determine the temperature in Bangor.
3x + 82 = 22
3x + 22 = 82
3x - 22 = 82
3x - 82 = 22

Answers

Answer:

the answer is c I believe

Perform the indicated operation.

(-50) ÷ (-2)

Answers

(-50)/(-2)

= 25

when numbers with same signs are divided it gives positive sign........

When 2 negative number are divided it turn positive so it basically just 50/2 which is 25. So your final answer is 25. Hope this helps!

Someone please helppp

Answers

Answer:

Step-by-step explanation:

L = 2 + sqrt(2)

W = 4 - 2sqr(2)

Area = L * W

Area = (2 + sqrt(2) )* (4 - 2sqrt(2) )

Use Foil

F: 2*4 = 8O: 2*(-2sqrt(2) = - 4sqrt(2)I: 4*sqrt(2)L: sqrt(2)*(-2sqrt(2) = - 2*2= - 4

Result

Area = 8 - 4 - 4sqrt(2) + 4sqrt(2)

Area = 4

find the surface area. Leave your answer in terms of pi

Answers

Answer:

210*pi

Step-by-step explanation:

Surface area=2*pi*r*(r+h)

=2*pi*5*(21)=210*pi

How do I solve this

Answers

The awnser is (-1, 3)

Answer:

x = -1 y = 3

Step-by-step explanation:

x = 2y-7

2x + 3y = 7

Substitute x =2y-7 in 2y + 3y = 7

2(2y-7) + 3y = 7

4y-14+3y = 7

7y - 14 = 7

7y = 7 + 14

7y = 21

7y/7 = 21/7

y = 3

Substitute 3 for y in x = 2y-7

x = 2(3) - 7

x = 6 -7

x = -1

Answered by Gauthmath

what is |-41 | pls hurry

Answers

Answer:

41

Step-by-step explanation:

The absolute value means take the non-negative number

|-41| = 41

HELP ILL GIVE BRAINLIEST

Answers

Answer:

the image/text is not there

Step-by-step explanation:

what is the the value of ∣9∣

Answers

Hey there! I'm happy to help!

This symbol is an absolute value symbol. It means that we are looking for that number's distance from 0. There is no such thing as a negative distance; the distances are all positive, so both ∣9∣ and ∣-9∣ have a value of 9.

Have a wonderful day and keep on learning! :D

which is less full? A dump truck that is 1/10 full or one that is 7/10 full?

Answers

Answer:

Its the first one

Step-by-step explanation:

A dump truck that is 1/10 is less full than a 7/10 one.

1/10 is your answer.

https://www.commoncoresheets.com/Math/Fractions/Comparing%20Fractions%20Relative%20Size/English/1.pdf

What is the value of a? Round to the nearest tenth.

Answers

Answer:

50 percent?

Step-by-step explanation:

Other Questions
TotalWinnings6Translate I repeat the words into Spanish by filling in the missing letters:Yo retoaabrI repeat the words Venn diagrams: unions, intersections, and complementsAttached is the photo reference During the writing process, which activity is completed in the planning step?A. choosing a topicB. rearranging contentC. checking for spelling errorsD. creating a rough draftE. refining sentence structure what is the answer to (35+5)[16+(12 4)] I dont know how know if it a -,+ am confused on how you measure Change the verb in the parentheses to correct subjunctive formEl farmacutico me sugiere que yo (tomar) unas pastillas.La mdica les exige a las enfermeras que (trabajar) mucho. Los nios le ruegan al mdico que no les (dar) una inyeccin. La enfermera les aconseja a los muchachos que no (comer) mucho pastel. Why is Janaki Temple called Naulakha temple?How is is this temple a national pride for Nepal?Give reasons. . The librarian asked us_________so much noise. A. not to make B. no make C. not making D. dont make Where ____?have you beenare you beenhas you beenhave you werecual es lacorrecta? A certain polytomic ion contains 49 protons and 50 electrons. What's the net charge of this ion? What is 7 1 in expanded form Ammonium phosphate NH43PO4 is an important ingredient in many fertilizers. It can be made by reacting phosphoric acid H3PO4 with ammonia NH3. What mass of ammonium phosphate is produced by the reaction of 5.5g of phosphoric acid Edwin works at a fast-food restaurant. Every Tuesday, he helps unload a delivery truck. Thistable shows how many boxes of hamburger buns and how many boxes of potatoes he unloaded last Tuesday,What is the weight of each box? For num in range (1,10) : if num is %2 = = 0: print (num) Name of the best Android keyboardPls I need it asap!! For educational purposeI need your Ideologies According to Douglass's narrative, why is life in a city better for enslaved people than life on aplantation?Enslaved peopleare allowed to choose their own masters.Enslaved people keep their own wages in the city.They can take trips to visit relatives.They are better clothed and fed. A hot air balloon is released into the air. During its straight ascent, the angle of elevation was 15 and, 3 minutes later, the angle of elevation increased 20. How fast is the balloon traveling, in km/h, if the angle measurements were taken 300m away from the launch site? Dennis needs to remind all 557 patients that the doctor's office will not be open on Fridays during the summer months. What is the most appropriate way to communicate this information to her patients? a) text b) email one-on-one meetings d) phone calls If x/4-y/6=1/6 and y/z=1/2, then what is the value of 3x-z? A. 4 B.6 C. 3 D. 2 E. None hi plz help ASAP tyyy ^^