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3 years ago

Help me solve this. Thank youx

Mathematics

1 answer:

liubo4ka [24]3 years ago

7 0

I guess it's b

${x}^{2} + 8x + 16 \\ \\ 1. \: {x}^{2} + 2(x)(4) + {4}^{2} \\ 2. \: (x + 4)^{2}$

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Find the product of (x + 9i)2.

blagie [28]

X + 18i is the final product

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3 years ago

Show how are 5 hundreds and 4 tens the same as 4 hundreds and 14 tens.

kykrilka [37]

Answer:

100+100+100+100+100+10+10+10+10 = 540

100 = 10+10+10+10+10+10+10+10+10+10

400 + 100 + 10 + 10 + 10 _ 10

Step-by-step explanation:

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3 years ago

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3 years ago

The variable x represents the number of angelfish Carlos bought and the variable y represents the number of parrotfish he bought

siniylev [52]

X + y = 405
y = 8x

To solve:
Plug the second equation into the first and solve for x.
x + 8x = 405
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y = 8(45)
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3 years ago

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The area of Europe is approximately 9.94 × 106 square kilometers. Its population is approximately 7.31 × 108 people. What is the

Kipish [7]

The population density is 73.54 people per square kilometer

Solution:

Given that,

Area of europe = $9.94 \times 10^6$ square kilometers

Population = $7.31 \times 10^8$

To find: population density

The formula for population density is given as:

$\text{ population density } = \frac{\text{ number of people }}{\text{ land area }}$

Substituting the values in formula, we get

$\text{Population density } = \frac{7.31 \times 10^8}{9.94 \times 10^6}\\\\\text{ use the law of exponent } \frac{a^m}{a^n} = a^{m-n}\\\\\text{Population density } = 0.7354 \times 10^{8-6}\\\\\text{Population density } = 0.7354 \times 10^2\\\\\text{Population density } = 73.541$

On rounding to nearest hundreth (two decimal places ), we get 73.54

Thus the population density is 73.54 people per square kilometer

3 0

3 years ago