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Shtirlitz [24]
3 years ago
13

A zoo has 40 emperor penguins . if 30% of them are male , how many are male

Mathematics
1 answer:
drek231 [11]3 years ago
3 0

Answer:

12 of them are male.

Step-by-step explanation:

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21y+7x=56? what is the value of X
PSYCHO15rus [73]

Answer:

x = 8 - 3y

Step-by-step explanation:

21y+7x=56\\\\21y-21y+7x=56-21y\\\\7x=56-21y\\\\\frac{7x=56-21y}{7}\\\\\boxed{x=8-3y}

Hope this helps.

4 0
3 years ago
Using the rules for special cases, what is the result of?
Arlecino [84]

Answer:

C) 4x^2 -8x +4[/tex]

Step-by-step explanation:

(-2x+2)^2

we apply (a+b)^2 formula

(a+b)^2 = a^2 + 2ab +b^2

a= -2x  and b= 2

Replace 'a' with -2x  and 'b' with 2

(-2x+2)^2 = (-2x)^2 + 2(-2x)(2) +2^2

(-2x)^2 is 4x^2

(-2x+2)^2 = 4x^2 -8x +4

option C is the answer



8 0
3 years ago
Read 2 more answers
The population of city is 2500 if the number of males is 240 more than females how many males and females are there in the city?
Blizzard [7]
There are 1130 females. There are 1370 males. What I did was take 2500 and subtracted 240 from it. I got 2260 and then divided that number by 2 and got the number of females. Then I took that number and added 240 to it and got the number of males.
5 0
3 years ago
The ratio of a to b is 9:2, and the ratio of c to b is 5:3. What is the ratio of a to c?
xz_007 [3.2K]
The answer is that the ratio of a to c is 9/5
8 0
3 years ago
Fabian bought 223 feet of wood to build
PilotLPTM [1.2K]

Answer:

111 boxes

Step-by-step explanation:

He bought 223 feet of wood

Each box will take 2 feet

To determine the total number of box he'll make from 223,

1 box = 2 feet of wood

X box = 223 feet of wood

X = (223 × 1) / 2

X = 111.5 box approximately 112 boxes

But technically, since its 111.5, he'll be able to make 111 boxes completely with 0.5 feet of wood left

5 0
3 years ago
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