All categories

3 years ago

A zoo has 15 Emperor penguins. The Emperor penguins make up 30% of all the penguins at the zoo

Mathematics

1 answer:

Otrada [13]3 years ago

5 0

Answer:

Step-by-step explanation:

there is 15 emperor penguins...they make up 30% of all the penguins

so 30% of all the penguins is 15

let x represent all the penguins

turn ur percent to a decimal

0.30x = 15

x = 15 / 0.30

x = 50 <===== 50 total penguins

You might be interested in

Madeline works as a part time job at Parkland Hospital for $20 per hour. She worked for 10 hours last week and must pay 10% in t

ioda

Answer:

Step-by-step explanation:

20 x 10 = 200

10% = 0.10

200 x 0.10 = 20

7 0

3 years ago

Read 2 more answers

The roots of a quadratic equation ax2+bx+c=0 are 3+sqrt2 and 3−sqrt2. Find the values of b and c assuming that a=1.

slamgirl [31]

Answer:

$b=-6\\c=7$

Step-by-step explanation:

we know that

The general equation of a quadratic function in factored form is equal to

$y=a(x-x_1)(x-x_2)$

where

a is a coefficient of the leading term

x_1 and x_2 are the roots

we have

$a=1\\x_1=3+\sqrt{2}\\x_2=3-\sqrt{2}$

substitute

$y=(1)(x-(3+\sqrt{2}))(x-(3-\sqrt{2}))$

Applying the distributive property convert to expanded form

$y=x^2-x(3-\sqrt{2})-x(3+\sqrt{2})+(3+\sqrt{2})(3-\sqrt{2})$

$y=x^2-(3x-x\sqrt{2})-(3x+x\sqrt{2})+(9-2)$

$y=x^2-3x+x\sqrt{2}-3x-x\sqrt{2}+7$

$y=x^2-6x+7$

therefore

$b=-6\\c=7$

7 0

2 years ago

Express 3.3.3.5.5 using exponents

nadya68 [22]

I assume you mean 3*3*3*5*5 it would be 3^3 times 5^2. thats as simplified as i can make it. hope this helps! if anyone knows a better way to put these please post.

7 0

2 years ago

1. What does it mean that a <br> reflection maps AEFG onto AE'F'G?<br><br> HELPPP PLEASE❗️❗️❗️‼️‼️

attashe74 [19]

Answer:the answer is app u welcome text me back if i got it wrong armstrongtamarion

Step-by-step explanation:

8 0

2 years ago

What’s the correct answer?

AleksAgata [21]

Answer:

1/7

Step-by-step explanation:

1 - 0 1

------ = -------

0 - ( - 7) 7

3 0

2 years ago