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
prisoha [69]
3 years ago
14

The perimeter of triangle ABC is 36 cm. Its sides are proportional to the numbers 3, 4 and 5. Find the sides of the triangle.

Mathematics
1 answer:
DiKsa [7]3 years ago
5 0

Answer:

3x+4x+5x=36

12x=36

x=36/12

x=3

3x=3 into 3=9

4x=4 into 3=12

5x=5 into 3=15

You might be interested in
how do you write y - 2 = -(x - 3) in slope-intercept form? A) y = x + 3 B) y = x - 1 C) y = -x + 5 D) y = -3x - 1
SashulF [63]
C) y= -x+5
explain:
y-2=-x+3
y= -x+3+2
so y= -x+5
5 0
2 years ago
A clinical trial tests a method designed to increase the probability of conceiving a girl. In the study 340 babies were​ born, a
Bas_tet [7]

Answer:

The 99% confidence interval estimate of the percentage of girls born is (0.8, 0.9).

b)Yes, the proportion of girls is significantly different from 0.5.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence interval 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

Z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

For this problem, we have that:

In the study 340 babies were​ born, and 289 of them were girls. This means that n = 340, \pi = \frac{289}{340} = 0.85

Use the sample data to construct a 99​% confidence interval estimate of the percentage of girls born.

So \alpha = 0.01, z is the value of Z that has a pvalue of 1 - \frac{0.01}{2} = 0.995, so z = 2.575.

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{340}} = 0.85 - 2.575\sqrt{\frac{0.85*0.15}{400}} = 0.80

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{340}} = 0.85 + 2.575\sqrt{\frac{0.85*0.15}{400}} = 0.90

The 99% confidence interval estimate of the percentage of girls born is (0.8, 0.9).

Does the method appear to be ​effective?

b)Yes, the proportion of girls is significantly different from 0.5.

4 0
3 years ago
Ashley and her sister decide to split the cost of dinner , which is $14 . How much will each sister pay?
Mazyrski [523]

Answer:

14÷2=7

7 is your answer. hope this helps

5 0
2 years ago
Read 2 more answers
In August, 85% of the middle school students voted in a school election. The number of students who voted was 544. How many stud
Maksim231197 [3]

Answer:

640 students

Step-by-step explanation:

544 divided by 85%= 640

5 0
3 years ago
Find the height of a triangle with a base of 4 1/4 cm and an area of 5 5/16 cm squared
Paha777 [63]

Answer:

hb=2.5

Step-by-step explanation:

base = 4

area  =  5

6 0
3 years ago
Other questions:
  • Which lines are parallel? Justify your answer.
    5·2 answers
  • Regina purchased a new VCR for $215. The sales tax is $11.83! What is the sales tax rate ?
    13·1 answer
  • PLEASE HELP!!! The question is in the picture!
    8·1 answer
  • How many solutions are possible for the equation 5(x-3)=7x-2(x+)1
    7·1 answer
  • The points(0,2) and (4,-10) lie on the same line and the points (-5,-3) and (2,11) lie on another line. Determine by graphing wh
    13·1 answer
  • If I put $300 in an account that earns 5.5% compounded yearly, how much will there be in the account at the end of 21 years
    7·1 answer
  • Add.
    6·2 answers
  • Henry and 28 classmates go on a
    13·1 answer
  • Kyle earned 4 times as much as Ken last summer. If they earned a total of $750, how much did they each earn?
    5·1 answer
  • If f(x) = 3x - 1 and g(x) = x + 2, find (f - g)(x).
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!