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artcher [175]
3 years ago
11

in a class 60% of the students are girls there are 18 girls in the class. how many students are in the class and how many boys a

re in the class? Show Work
Mathematics
2 answers:
kobusy [5.1K]3 years ago
7 0
There are 30 students and 12 boys

d1i1m1o1n [39]3 years ago
3 0
60%-------> 18
40℅------>?
100%------>?

to find the answers first divide 18 by 60=0.3, now we know the number for 1%
now workout the 40% by multiplying it by 40%
0.3×40= 12
so the number of boys is 12
to find the total add the no. boys and girls.
12+18=30 so the total number of pupils is 30.

hope it helps


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Which smallest number must be assigned to # to make the number 378#96 divisible by 8?
skelet666 [1.2K]

Answer:

2

Step-by-step explanation:

378296/8=47287

5 0
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The picture shows the graphs of the functions expressed by a formula of the following type: y = kx + b.
ollegr [7]

Answer:

line 1: y= 1x+ 2

line 2: y= -1x-0.5

(usually 1 is omitted but I added for clarity)

Step-by-step explanation:

slope (x)= yfinal-yintial/xfinal-xinitial

b= where line intersects y axis

line 1:  (-1,0), (0.5,1.5)

(1.5-0)/(0.5-(-1))

(1.5)/(1.5)

slope= 1x

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line 2: (-0.5,0), (0.5,-1)

(-1-0)/(0.5-(-0.5))

(-1)/(1)

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7 0
3 years ago
Read 2 more answers
Y/3 - 9 = 12 And tell me how to show work pls.
ella [17]

Answer:

63

Step-by-step explanation:

so y/3 - 9 = 12, add 9 on both sides and you get y/3 = 21. Then you multiply both sides by 3, y/3 * 3, the 3's cancel out, 21 * 3 = 63. You get y = 63

So basically just do + 9 on both sides then *3 on both sides (do it step by step)

3 0
3 years ago
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was estimated that 12,000 people attended the football game Friday night. What could have been the actual number of people at th
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Between 11500 and 12499 people.
3 0
3 years ago
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Pedro has created the function f(x)= 4x-3/2 to represent the number of assingments he has completed where x represents the numbe
Law Incorporation [45]
The given function is
f(x) = 4x - 3/2
where
f(x) = number of assignments completed
x =  number of weeks required to complete the assignments

We want to find f⁻¹ (30) as an estimate of the number of weeks required to complete 30 assignments.
The procedure is as follows:

1. Set y = f(x)
   y = 4x - 3/2

2. Exchange x and y
   x = 4y - 3/2

3. Solve for y
   4y = x + 3/2
   y = (x +3/2)/4

4. Set y equal to f⁻¹ (x)
  f⁻¹ (x) = (x + 3/2)/4

5. Find f⁻¹ (30)
  f⁻¹ (30) = (30 + 3/2)/4 = 63/8 = 8 (approxmately)

Answer:
Pedro needs about 8 weeks to complete 30 assignments.

6 0
3 years ago
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