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
zhenek [66]
3 years ago
6

A random sample of 30 seventh grade students shows that 12 of them own a dog. How many seventh grade students can you predict ow

n a dog if the entire population of seventh graders is 400?
Mathematics
2 answers:
ArbitrLikvidat [17]3 years ago
4 0

Answer:

160

Step-by-step explanation:

If out of 30 7th graders, 12 own a dog then when you have 400 of them, 160 will have a dog as well.

The way I did this was by 400/30: which was 13.3 repeating. I then mutliplied this number by 12, to find the final answer of 160.

otez555 [7]3 years ago
3 0

Answer:

160

Step-by-step explanation:

proportion: 12/30 = 0.4

0.4 × 400

160

You might be interested in
I need help! Help a 6th Grader out! Please Asap!
natali 33 [55]

There isn’t no question to answer

5 0
3 years ago
Please help me on this question
Tasya [4]
I think Its C because in the frequency table or table given if the heads are counted there are 6 of them and over all 10 which will make 6/10
7 0
3 years ago
Simplifying rational expressions
Sonbull [250]
1. \frac{(c + 8)(c - 8)}{(c - 8)(c + 3)}_,_
    \frac{c + 8}{c + 3}_,_

2. \frac{n^{2} + 4n - 12}{n^{2} + 2n - 8}_,_
    \frac{n^{2} + 6n - 2n - 12}{n^{2} + 4n - 2n - 8}_,_
    \frac{n(n) + n(6) - 2(n) - 2(6)}{n(n) + n(4) - 2(n) - 2(4)}_,_
    \frac{n(n + 6) - 2(n + 6)}{n(n + 4) - 2(n + 4)}_,_
    \frac{(n - 2)(n + 6)}{(n - 2)(n + 4)}_,_
    \frac{n + 6}{n + 4}_,_

3. \frac{42x^{2}y^{3}}{28x^{3}y}_,_
    \frac{3y^{2}}{2x}_,_

4. \frac{m^{2} - 3m - 10}{m - 5}_,_
    \frac{m^{2} - 5m + 2m - 10}{m - 5}_,_
    \frac{m(m) - m(5) + 2(m) - 2(5)}{m - 5}_,_
    \frac{m(m - 5) + 2(m - 5)}{m - 5}_,_
    \frac{(m + 2)(m - 5)}{m - 5}_,_
    m + 2_,_
3 0
3 years ago
Consider the expression 4 5/7 + 3 1/2 write an equivalent expression that has numbers with like denominators. Enter your express
marissa [1.9K]
You can do 4 10/14 + 3 7/14
3 0
2 years ago
a family has two cars. the first car has a fuel efficiency of 20 miles per gallon of gas and the second has a fuel efficiency of
nikklg [1K]

Car A consumes 25 gallon and car B consumes 15 gallon.

Step-by-step explanation:

Given,

The fuel efficiency of car A = 20 miles per gallon.

The fuel efficiency of car B = 15 miles per gallon.

In a week, two cars went 725 miles and consumed 40 gallons.

To find the consumption of each car in that week.

Let,

Car A consumed x gallon

Car B consumed y gallon.

According to the problem,

x+y = 40 ----- (1)

20x+15y = 725

or, 4x+3y = 145 -------- (2)

From (1) we get, x = 40-y

Putting the value of x in (2) we get,

4(40-y)+3y = 145

or, 160-4y+3y = 145

or, -y = 145-160

or, y = 15

From (1) we get, x = 40-15 = 25

Hence,

Car A consumes 25 gallon and car B consumes 15 gallon.

7 0
2 years ago
Other questions:
  • 144% of what number is 33​
    5·1 answer
  • A random sample is also called an unbiased sample. <br> True or False
    7·2 answers
  • If all the beads in a jar are either orange or purple and the ratio of orange to purple beads is 6 to 5, what is the ratio of th
    6·1 answer
  • translate this sentence into an algebraic equation. 117 is the product of Han's age and 9. Use the variable to represent Han's a
    5·2 answers
  • Melanie can run around the track 9 times in 28 minutes. At this rate, how many laps can she run in 1 hour and 15 minutes?
    11·1 answer
  • Please help !!!!!!!!!!!
    10·1 answer
  • Also round answers to three decimal places​
    8·1 answer
  • Question 5 of 8<br> In arithmetic, variables look like<br> Answer here<br> SUBMIT
    9·1 answer
  • Speed =________
    10·2 answers
  • What is the perimeter?<br> 8 m<br> 4 m<br> 4 m<br> 12 m<br> meters<br> Submit
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!