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
DiKsa [7]
2 years ago
5

A zoo has 15 emperor penguins The emperor penguins make up 30% of all the penguins at the zoo. How many penguins live at the zoo

Mathematics
1 answer:
r-ruslan [8.4K]2 years ago
3 0

Let x + 15 = total penguins

15/ (x +15) = .30

15 = .30x + 4.5

.30x  = 10.5

x = 35

Total penguins = 15 + 35 = 50

Double Check

15 / 50 * 100 = 30%  Correct!!!


You might be interested in
Space Shuttle has three computers. Computer A is a primary computer and Computer B and Computer C are auxiliary computers. There
sweet-ann [11.9K]

Answer:

Required probability equals 0.18%

Step-by-step explanation:

The probability that the primary and one auxiliary computer fails equals

1) Probability that A and B fails

2)Probability that A and C fails

Thus required probability equals

P(E)=P(1)(2)+P(1)P(3)\\\\P(E)=0.03\times 0.03+0.03\times 0.03P(E)=0.18%

3 0
2 years ago
HELPP PLEASE ! This mapping shos a functional reationship.
Elina [12.6K]
The answer is 3 // The ones in blue are the domain and the ones in red are the range
4 0
2 years ago
What is the diameter of a circle with a circumference of 176 feet use for 22 over for pie
Ipatiy [6.2K]
Formula for Diameter: <span>2 x radius
Formula for Radius:  R= C/2(pi)</span>
R= 176/2(22/7)
R=28.01
2(28.01)=56.02

Answer= 56.02


7 0
3 years ago
X+y=13 and 1/2x+y=10
photoshop1234 [79]
X=6
y=7

6+7
= 13

1/2(6) + 7
= 3 +7
=10
6 0
3 years ago
The selling price of a​ refrigerator, is ​$ 796.40 . If the markup is 10 % of the​ dealer's cost, what is the​ dealer's cost of
8_murik_8 [283]

The final price (what it is selling for) is $796.40

The markup is 10% of the original price (the dealer's cost) , meaning that it is 10% more.

We need to find the original price.

We write this as an equation

The original price *110% = final price

This is because the original price is itself (100%) added with 10%

Plug in the known final price

Original Price * 110% = 796.40

Convert 110% to a decimal because the other numbers- such as the final price are also decimal numbers.

Convert 110% to a decimal by moving the decimal point up 2 spaces ( basically dividing it by 100)

110% = 1.1

So it is now

Original price *1.1 = 796.40

Divide both sides by 1.1 to isolate our unknown, the original price

Original price = $724

5 0
3 years ago
Other questions:
  • John wants to make two frames for his artwork. One frame requires 3 1/2 feet of molding the other requires 4 2/3 feet of the sam
    8·1 answer
  • How do I solve this
    8·1 answer
  • I have no idea how to solve this. I have to teach myself this and I’m stuck. How do I find x?
    5·1 answer
  • I have a questions does any take the 3 chapter test about math if any one please say yes in the comments below
    9·1 answer
  • X plus the letter y equals the number 8
    9·2 answers
  • a lady left from Nakuru to Mombasa she drove for 1 hour 45 min she toke a 15 min break then she drives for another 1 hour 20 min
    5·1 answer
  • starting in 2000 what is estimated population and annual growth rate of 19,169,000 at 0.6% for 2025 not sure how to do this​
    5·1 answer
  • What is the population in orlando fl<br> also who live in bradenton
    7·2 answers
  • Which situation is an example of an observational study?
    10·2 answers
  • 9) Which solution is correct? Be sure to check for extraneous solutions.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!