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finlep [7]
3 years ago
15

There are 18 girls in mr.brimleys class. If 60 percent of the students are girls how many students are in mr.brimley’s math clas

s?
Mathematics
1 answer:
emmainna [20.7K]3 years ago
8 0

Answer:

30 students in the class.

Step-by-step explanation:

There are several which in which we can approach this question:

We can do this question using direct proportion.

"If 18 girls represent 60%, how many students represent 100%?"

18

60

=

x

100

x

=

18

×

100

60

30

students altogether.

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guapka [62]
It takes Selma 1/6 of a hour to run 3/4 miles.
Just multiply 3/4 by 6 to get 18/4 which is 4.5 miles or 4 1/2 mile
7 0
3 years ago
What is the answer a factory adds three red drops an two blue drops of coloring to white paint to make each pint of purple paint
Elan Coil [88]

Answer:

Red = 30 drops

Blue = 20 drops

Step-by-step explanation:

The ratio red to blue is 3 : 2

Sum of ratios = 3 + 2 = 5

Required purple paint = 50 gallons

So,

Multiplier = \frac{50}{5} = 10

Now, Red drops = 3×10 = 30

Blue drops = 2×10 = 20


4 0
4 years ago
Read 2 more answers
Aisha measures the length of a sheet of paper and finds that it is 29 cm long. The label on the package indicates that the paper
Masteriza [31]

Answer:

just do the step by step and you'll probably get it because it's quite simple but hard for me to explain so just read this!

Step-by-step explanation:

In making any measurement, the chances are that our results will not be absolutely accurate.  We can often compare our results with some standard or accepted value to see how closely they agree.  But how much error can be allowed before the result becomes meaningless?

As you may guess, the amount of error that is acceptable varies with the situation.  Suppose you measure the distance on a map between your Scarsdale and Mamaroneck and you get a result of 5 miles.  If the actual distance is 5 1/2 miles, the chances are this error will have no effect on the trip between the two towns. But if the same degree of error existed in the calculations used to send astronauts to the moon, those people would be in big trouble!

Percentage Error =  <u>measured value - accepted value</u>  x 100%

                                             accepted value          

Suppose, you measured the length of a table and obtained a measurement of 202 cm.  A friend also measures the table and obtains a result of 198 cm. To calculate the percentage error in each of the measurements, you need to know the "correct' or “accepted value” of the length of the table. After consulting the manufacturer’s catalog, you find that the table's length is listed as 200 cm in length. This will be used as the accepted value in our calculation.

The calculations of percentage error for the two measurements are shown below. Both measurements show an error of 1%. Your friend has made a measurement which is on the low side of the accepted value and is therefore, negative. You, on the other hand, have made an error on the high side of the accepted value and it is positive.

I dont know the answer but I hope this helped!

(sorry for the inconvenience)

6 0
3 years ago
A diagnal is drawn on a square. How many triangles are formed ? What is the sum of the measures of the angles of a triangle? wha
Alik [6]
  • 2 triangles are formed.
  • The sum of the measures of the angles of a triangle is 180 degrees.
  • The sum of the measures of the angles of a square is 360 degrees.

8 0
2 years ago
Find the value of V31.36
Strike441 [17]
The value of v31.36 is v86.29 search it up
7 0
3 years ago
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