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yuradex [85]
3 years ago
5

ILLLLLmark brainliest plssssssss heeeelpppp

Mathematics
2 answers:
exis [7]3 years ago
6 0

Answer:

a) (x+2)^2-2

Step-by-step explanation:

write in form of x^2+2ax+a^2

2a=4

a=2

so

x^2+4x+2^2

we will now convert into the form:

x^2+2ax+a^2=(x+a)^2

substitute the values:

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

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

(x+2)^2-2

Evgen [1.6K]3 years ago
6 0

Answer: (x + 2)2 − 2

Step-by-step explanation:

use the formula (\frac{b}{2})^{2} in order to create a new term and complete the square.

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A blazer cost $38 and you pay $39.90. how much is the sales tax rate
geniusboy [140]
To find the percentage, you divide the new price ($39.90) by the original price ($38), and the multiply it by 100 to change the answer from a decimal to a percentage:

39.90 / 38 x 100 = 105

So 39.90 is 105% of 38

To get our final answer, subtract this by 100%

105 - 100 = 5%

ANSWER: So the percentage increase of the price is 5%  ($1.90)

5 0
2 years ago
The local newspaper has letters to the editor from 70 people. If this number represents 5% of all of the​ newspaper's readers, h
Alex Ar [27]

Answer:

This shows us that there are 1400 readers.

Step-by-step explanation:

To work this out you would first need to find how many times 5% goes into 100%, You can do this by dividing 100 by 5, this gives you 20. This is because the whole amount  is equivalent to 100%.

To work out the total number of readers you would multiply 70 by 20, this gives you 1400. This is because we know that 70 is equivalent to 5% and that 5% goes into 100% 20. So by multiplying 70 by 20 we are working out the total (100%), and that this shows us there are 1400 readers.

1) Divide 100 by 5.

100/5=20

2) Multiply 70 by 20.

70*20=1400

8 0
2 years ago
What do u notice to this picture?
trasher [3.6K]

Answer:

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3 0
2 years ago
There were 442 students at Deerlake Middle School who voted on a theme for the spring carnival. Those who voted represent 76% of
never [62]

Answer:

Option C is correct.

Step-by-step explanation:

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\frac{76}{100}\times x=442

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3 years ago
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Answer:


Step-by-step explanation:

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