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
zloy xaker [14]
3 years ago
8

The ratio of girls to boys in Mr. Smith's homeroom is 3:4. The ratio in Mr. Smith's homeroom to students in the whole 7th grade

is 1:5. The ratio of students in 7th grade to students in the whole middle school is 2:7. If there are 12 girls in Mr. Smith's homeroom, how many students are in the whole middle school?
Mathematics
1 answer:
Leno4ka [110]3 years ago
6 0

3:4 = G:B

1:5 = Mr. Smith's class: 7th Grade

2:7= 7th: Middle school

12 girls = 3 units

1 unit = 12/3= 4

Boys = 4x4= 16

<em>Whole class = 28 students</em>

Class : Grade = 1:5     <em> 7 = number of units in  Mr. Smith's class</em>

28 = 1 unit

5 units= 28x5= 140 <em>There are 140 kids in the grade</em>

140 = 2 units

1 unit = 140/2= 70

70x7=490

<u><em>There are 490 students in the whole grade</em></u>



You might be interested in
Which is a correct two-column proof?<br> Given: ∠h and ∠c are supplementary.<br> Prove: j || l
erica [24]
Well currently, we don't have sufficient evidence to prove that. we don't even know anything about j and l
6 0
3 years ago
A ceramics workshop makes wreaths, trees, and sleighs for sale at Christmas. A wreath takes 3 hours to prepare, 2 hours to paint
Vanyuwa [196]
If all things can be made at the same time, then it would look something like this(all numbers should be rounded down):

127 of Prep: Wreath:127/3 = 42 prepped
127 of Prep: Tree:127/14 = 9 prepped
127 of Prep: Sleigh:127/4 = 31 prepped

104 of Painting: Wreath:104/2 = 52 painted(but because only 42 were prepped, your number will be 42 still)
104 of Painting: Tree:104/3 = 34 painted(As stated above, but with only 9)
104 of Painting: Sleigh:104/17 = 6 painted(this number will overwrite the number of prepped sleighs as only 9 could be painted in the allotted time.)

133 of Firing: Wreath:133/9 = 14 ready to go
133 of Firing: Tree:133/4 = 33(but only nine were painted so the number ready to go is 9) 
133 of Firing: Sleigh:133/7 = 19(but only 6 are ready to go)

Final Results: Wreath - 14
                       Tree - 9
                      Sleigh - 6
4 0
3 years ago
Read 2 more answers
Round the number 817.0863 to the nearest:
butalik [34]

Answer:

(a) hundreds = 817

(b) hundredths = 817.09

(c) 3 d.p = 817.086

(d) 4 s.f. = 817.1

(e) whole number = 817

5 0
3 years ago
What is the volume of the cylinder height 12cm length 4cm
erica [24]

Answer:

192\pi \:  {cm}^{3}

Step-by-step explanation:

h = 12 cm, r = 4 cm

V_{cylinder}  = \pi {r}^{2} h \\  = \pi  \times {4}^{2}  \times 12 \\  = \pi \times 16 \times 12 \\  V_{cylinder}= 192\pi \:  {cm}^{3}

6 0
3 years ago
Yoyo left her house with $25 in her wallet. When she returned home, she only had $5. What was the percent change in the amount o
Ivanshal [37]

Answer:

80%

Step-by-step explanation:

you subract 5 from 25 and thats 20 and then u do 20/25 and simplfy and turn it into a decimal

5 0
3 years ago
Other questions:
  • Graph the following inequality and then select the correct graph below. x + y &lt; 1
    12·2 answers
  • What is the answer, I’m having a hard time understanding it.:(
    15·1 answer
  • What is the classification of the square root of 36
    7·2 answers
  • A nick on the edge of a CD rotates to (−6, 5) during one song when represented graphically.
    8·2 answers
  • The table below represents a function.
    7·2 answers
  • What percent of one hour is 25 minutes?
    15·1 answer
  • The GCF of each pair of monomials<br> 24, 48m
    8·1 answer
  • It said that it was wrong.
    12·2 answers
  • The end points of Line GH are G (10,2) and H(4,8). Find the coordinates of the midpoint M.
    12·1 answer
  • Just an answer im to lazy to do help pls m
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!