All categories

3 years ago

The ratio of girls to boys in Liza’s classroom is 5 to 4. How many girls are in her classroom if there is a total of 27 students

Mathematics

2 answers:

tigry1 [53]3 years ago

4 0

27/5 and 27/4 so the ratio is 13 boys 14 girls

andrezito [222]3 years ago

3 0

Answer:

$15\ girls$

Step-by-step explanation:

Let

x-----> the number of girls

y-----> the number of boys

we know that

$x+y=27$ -----> equation A

$\frac{x}{y}=\frac{5}{4}$

isolate the variable y

$y=\frac{4}{5}x$ -----> equation B

Substitute equation B in equation A

$x+\frac{4}{5}x=27$

$\frac{9}{5}x=27$

$x=5*27/9=15\ girls$

You might be interested in

a car traveling at 30 m/s starts to decelerate steadily. it comes to a complete stop in 12 seconds. what is its acceleration?

creativ13 [48]

Just divide -30 m/s (the change in velocity) by 12 seconds (the time required for the car to come to a stop):

-30 m/s
----------- = - 2,5 m / (sec)^2 (answer)
12 sec

5 0

2 years ago

Which of the following is true regarding ANOVA?

Nikitich [7]

Answer:

Option d) Both (a) and (c)

Step-by-step explanation:

ANOVA

It stands for analysis of variance
It is used to check difference in mean of three or more groups.
It can also be used to check the difference between mean of groups.
It can also be used to check the difference between medians of groups.
There are many types of ANOVA test: one way, two way, etc

Thus, the correct answer is

Option d) Both (a) and (c)

6 0

2 years ago

Using the inequity -16k-32>-48

3241004551 [841]

Answer:

k<1

Step-by-step explanation:

1. Add 32 to both sides

-16k-32+32>-48+32

2. Simplify

-16k>-16

3. Reverse the sign (You only reverse the sign if you are DIVIDING BY a negative.)

-16k/-16 = k

-16/-16 = 1

You're left with k < 1

Your number line graph should be an open circle at 1 going to the left.

8 0

3 years ago

A sheriff is interested in the average speed that people drive on Highway 50. Match the vocabulary word with its corresponding e

aleksandr82 [10.1K]

Answer:

1. Statistics

2. Sample

3. Population

4. Variable

5. Data

6. Parameter

Step-by-step explanation:

1. Statistics is the mean of the sample taken - The average speed that the 250 randomly selected drivers drove on Highway 50

2. Sample is the representative part of the population - The 250 randomly selected drivers who were on Highway 50

3. Population is the group of people from which the sample was taken - All people who drive on Highway 50

4. Variable is a quantity that has values which differ - The speed that a driver drives on Highway

5. Data is information obtained used for a specific purpose - The list of the 250 speeds that the drivers studied drove

6. Parameter is the mean of a population - The average speed that all drivers go on Highway 50

4 0

3 years ago

7 1/2 divided by 3/4

vagabundo [1.1K]

Answer:

7 1/2 divided by 3/4= 10

5 0

3 years ago