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
Anna11 [10]
3 years ago
12

The mean weight of females in a class is 60kg and that of the males is 72kg. If the mean

Mathematics
1 answer:
zimovet [89]3 years ago
5 0

Answer:

1:2

Step-by-step explanation:

Let's say there are x males and y females in the class.

The sum of all male weights will be 72x, and the sum of all female weights will be 60y.

If we get a class mean weight, we have:

(72x + 60y) / (x+y) = 68

72x + 60y = 68x + 68y

4x = 8y

y / x = 4/8 = 1/2

So the ratio of females to males is the class is 1:2

You might be interested in
I need help with these two problems. [9 and 10] FORMULAS GIVEN!!
zaharov [31]
<h2>Question 9:</h2>

1. Use Pythagorean Theorem (a²+b²=c²) to solve for missing side of triangle and rectangle. x²+16²=20², or x²+256=400. So, x²=144, and x=12

2. Use formula: 1/2(h)(b1+b2). 1/2 (12) (30+14).

3. Simplify: 1/2 (12) (44)=1/2(528)=264

Area of whole figure is 264 square mm.

<h2>Question 10:</h2>

Literally same thing but with trigonometry.

1. Use sine to find out length of dotted line: sin(60°)=x/12

2: Simplify: 12*sin(60°)=x. x≈10.4 (rounded to the nearest tenth)

3. Use Pythagorean Theorem to find out last leg of triangle: 10.4²+x²=12²

4: Simplify: 108.16 +x²=144. x²=35.84 ≈ 6

5: Use formula: 1/2(h)(b1+b2). 1/2 (10.4) (30+36)

6: Simplify: 1/2 (10.4) (66) =343.2

7: Area of figure is about 343.2

Remember, this is an approximate answer with rounding, so it might not be what your teacher wants. The best thing to do is do it yourself again.

4 0
3 years ago
The rule below shows how to find the position of an object thrown upward with initial velocity of 15 feet per second. Which answ
nekit [7.7K]

Here we're applying a basic physics rule for vertical motion where the only pull on the object is gravity.


This rule has the form


h(t) = h + v t + (1/2)a*t^2

o o


To adapt this rule to this particular question replace h with 0, as the

o

upward path of the object begins at 0 ft. Replace v with +15 ft/sec.

o


Replace "a" with (-32.2 ft/(sec^2); this is the acceleration due to gravity.


Then we have the following, with the label F(t):


F(t) = 0 + (15 ft/sec)t + (1/2)(-32.2 ft)/(sec^2), or


F(t) = 15t - 16.1t^2. Thus, Choice D is correct.


Please note: To avoid confusion, please use " ^ " to denote exponentiation:


F(t) = -16t^2 + 15t

5 0
3 years ago
Read 2 more answers
person is scheduled to get arise of dollar 50 every 6 month in her 6 year on the job if starting salary os 1600 per month what i
Kisachek [45]

Answer:

1900 dollars

Step-by-step explanation:

7 0
3 years ago
PLEASE ANSWER QUICK!!!
aivan3 [116]

Answer:

(0,5) and (1,0)

Step-by-step explanation:

6 0
2 years ago
can someone please help me?!
Setler [38]
Angle 2 = 46°

Angle 3 = 180-46=134°
6 0
2 years ago
Other questions:
  • Mike drove 475 miles on tuesday.on wednesday he drove 498 mikes.how many miles did he drive
    5·2 answers
  • A number is 2 hundreds more than 355, what is the number?
    10·1 answer
  • Difference between an integer and a real number
    6·2 answers
  • emmanuel wants to buy a ticket to see his favorite basketball team during the upcoming season. the season includes 14 games in o
    6·1 answer
  • Given the function f(x) = 4^x - 1, explain and show how to find the average rate of change between x = 1 and x = 4.
    13·1 answer
  • Solve for y. Then graph the equation.
    15·1 answer
  • You are standing outside of a circle at point A. You know that you are 12 ft from a tangent point of the circle. You also know t
    14·1 answer
  • Can someone double check my answer please !!
    12·2 answers
  • Evaluate the following for f(x) = 3(2)^x<br><br>1. f (2) =<br><br>2. f (-1) =<br><br>3. f (10) =​
    9·1 answer
  • 26. Use the diagram given below to answer the questions that follow. Diameter = 18cm (Use r = 3.14) a. Find the area of the circ
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!