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
ElenaW [278]
3 years ago
7

Of the 645 speckled trout in a certain fishery that contains only speckled and rainbow trout, the number of males is 45 more tha

n twice the number of females. If the ratio of female speckled trout to male rainbow trout is 4:3 and the ratio of male rainbow trout to all trout is 3:20, how many female rainbow trout are there?A. 192B. 195C. 200D. 205E. 208
Mathematics
1 answer:
Kryger [21]3 years ago
7 0

Answer: D 205

Step-by-step explanation:

Let,

Number of all trouts = N

Number of speckled trouts = Ns = 645

Number of rainbow trouts = Nr

Number of male speckled trouts = Ms

Number of female speckled trouts = Fs

Number of male rainbow trouts = Mr

Number of female rainbow trouts = Fr

Since, Ms = 2Fs + 45

Also, Ms + Fs = 645

Therefore, 2Fs + 45 + Fs = 645

Fs = (645-45)/3 = 200

Female speckled trouts = 200

Since

Ms + Fs = 645

Ms = 645- 200 = 445

Since, Fs/Mr = 4/3

Mr = 3x200/4 = 150

Since,

Mr/N = 3/20

N = 20x 150/3 = 1000

Recall that,

N = Ms+Fs+Mr+Fr

Fr = N-Ms-Fs-Mr

Fr = 1000-445-200-150

Fr = 205

Therefore, the number of rainbow female trouts = 205

You might be interested in
For any approximately normal distribution, how can we find the relative frequency of the scores?
Juliette [100K]
<span>We can, transform the raw scores to z-scores and use the standard normal curve to find the relative frequency of the scores.

I hope this helped!</span>
7 0
3 years ago
Please help. Offering all the points I have.
Simora [160]

The most specific name of the quadrilateral that's is drawn in the picture is a rhombus.

<h3>What is a rhombus?</h3>

It should be noted that a rhombus simony means a quadrilateral that has four sides and the total angles are 360°.

Also, from the information given, it can be depicted that the lengths are congruent and that the opposite sides are parallel.

Learn more about rhombus on:

brainly.com/question/20627264

#SPJ1

8 0
2 years ago
I need help with these two problems
erastova [34]
Number 5 is 15.9 kilograms

And number 6 is 6 million cubic feet per minute

You just cross multiply
5 0
3 years ago
There are 80 skittles in a bag you pick a handful of 12 purple 6 orange 3 red 5 green 4 yellow. How many red skittles do you exp
frozen [14]

Answer

12

Step-by-step explanation

there is 15 of each color  3 take away 15 equals 12 red skittles left

7 0
3 years ago
Decide if the answer to 8/7 x 12 is less than, greater than, or equal to 12.
Genrish500 [490]

Answer:

Option C.

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
Other questions:
  • Write an equivalent fraction with the given denominator 6=?/5
    5·1 answer
  • Can someone help me plz
    7·1 answer
  • Just questions 4, 5 and 6
    5·1 answer
  • determine the decimal equivalent for 1/11 2/11 and 3/11. Use a pattern to mentally determine the decimal and equivalent for 7/11
    12·1 answer
  • Solve for x: −2x + 5 &lt; 7<br> a. x &gt; −1<br> b. x &lt; −1<br> c. x &gt; −6<br> d. x &lt; −6
    11·1 answer
  • Sonny works as a furniturw salesman and earns a base salary of 350 dollars per week plus 6% commission on sale.What was sonny's
    14·2 answers
  • Solve for x. 2/x =2/6
    12·1 answer
  • −
    11·1 answer
  • What is 6/7 divided by 4/7 as an improper fraction
    7·2 answers
  • Ginny divided the cake into 12 pieces. She gave 4 pieces to Sammy. What fraction of the cake did she have left?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!