1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Delvig [45]
3 years ago
9

In a school, the ratio of teachers to girls is 1:7 while that of boys to girls is 3:4, If there are 280 girls in the school, wha

t is the total number of pupils and their teachers?
Mathematics
1 answer:
Nuetrik [128]3 years ago
3 0

Answer:

The total number of pupils and their teachers = 530

                                                                             

Step-by-step explanation:

No. of girls in the school = 280

The ratio boys to girls is 3:4 and that of teachers to girls is 1:7

∴ The ratio boys to girls is 3x : 4x where, 4x = 280

and The ratio of teachers to girls is x : 7x where, 7x = 280

4x = 280

\frac{280}{4\\} = x

70 = x

So, the no. of girls in the school = 4x = 4(70) = 280 and the no. of boys in the school  = 3x = 3(70) = 210

7x = 280

\frac{280}{7\\} = x

40 = x

So, the no. of girls in the school = 7x = 7(40) = 280 and the no. of teachers in the school = x = 40

∴ The total number of pupils and their teachers = 280 + 210 + 40

                                                                             = 530

You might be interested in
Solve for m -mk-90>85
loris [4]
First add 90 to both sides) -mk>85+90simplify 85+90 to 175) -mk>175divide both sides by K) -m>175/kmultiply both sides by -1) m<-175/k
 YOUR ANSWER IS
M<-175/K 
hope l helped today l was stuck on the same question doing part 2 of alg exam , and l came through your question l hope it's not too late :)
5 0
4 years ago
SOMEONE HELP ME ASAP PLZZ!!!
Black_prince [1.1K]

Answer:

The distance of the plane from the base of the tower is 25.5 foot.

Step-by-step explanation:

As given

Max is in a control tower at a small airport.

He is located 50 feet above the ground when he spots a small plane on the runway at an angle of depression of 27°.

Now by using the trigonometric identity.

tan\theta = \frac{Perpendicular}{Base}

As shown in the figure given below

Perpendicular = CB

Base = AC = 50 feet

\theta = 27^{\circ}

Put in the identity.

tan\ 27^{\circ} = \frac{CB}{AC}

tan\ 27^{\circ} = \frac{CB}{50}

tan\ 27^{\circ} = 0.51\ (Approx)

Put in the above

0.51 = \frac{CB}{50}

CB = 0.51 × 50

CB = 25.5 foot

Therefore the distance of the plane from the base of the tower is 25.5 foot.


4 0
4 years ago
Divide: 26xy - 39y 13y
aleksandr82 [10.1K]
Divide the equation by???
5 0
3 years ago
Question<br> Simplify: (-12az² — 2z³) + (-2a³ +7a²z) − (−4a²z + 8az²),
slega [8]
Hope this helped :)
Check the image below for working

8 0
2 years ago
Eight more than three times a number equals four less than the number
zzz [600]

Hey!

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

Solution ↓

The question is asking you turn this mathematical explanation to standard form.

Eight more: + 8

Three times a number: (3 * n)

Equals: =

Four less than a number: n - 4

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

Final Answer ↓

(3 * n) + 8 = n - 4

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

Hope this helped! Good Luck!

6 0
4 years ago
Other questions:
  • (please answer ASAP, will give brainliest)
    7·2 answers
  • What's linear inequalities
    9·1 answer
  • Which situation is represented by the equation 6n+5=3n+20
    15·1 answer
  • Rob owes Debra $36 and pays her 1/3 of what he owes. How much does he now owe?
    9·2 answers
  • I'm confused<br>What is the answer?​
    15·1 answer
  • Question!! if anyone knows!!!
    15·1 answer
  • If you know 20 divided by 5 = 4 how does that help you caculate 200 dived by 5
    15·1 answer
  • Please help!!!!!! i really need it thanks.
    15·2 answers
  • What is the answer to p+12 =-18
    6·2 answers
  • . Kate is training for a bike race. She rides 5 miles one day, 10 miles the next day, and 15 miles the third day. If Kate contin
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!