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laila [671]
3 years ago
13

What number should be added to the expression x2+2x to change it into a perfect square trinomial?

Mathematics
2 answers:
coldgirl [10]3 years ago
5 0

Answer:

Option A. 1

Step-by-step explanation:

we know that

A perfect square trinomial is equal to

(x+a)^{2}=x^{2}+2xa+a^{2}

In this problem we have

x^{2}+2x

equate the equations and solve for a

x^{2}+2x=x^{2}+2xa+a^{2}

so

2x=2xa

a=1

therefore

the perfect square trinomial is equal to (x+1)^{2}

marysya [2.9K]3 years ago
4 0
A is the correct answer. I just did gues and check so I don't know the correct method
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Six more than a number,<br> n, is less than fourteen. Which inequality represents this relationship?
Yakvenalex [24]

Answer:

6 + n < 14

<em>just in case...</em>

n < 8

6 0
3 years ago
Figure out what the percent is
DaniilM [7]

The percentage of data that is roughly greater than 66, as displayed in the box plot, is 100%.

<h3>How to Determine a Percentage of a Data Represented in a Box Plot?</h3>

In a box plot, we have the following displayed five-number summary which tells what percentage of the data distribution for each part of the data distribution:

Upper quartile (Q3): This is the value at where the box in the box plot ends at the edge of the box. From this point to the left, all data values that fall within the bracket make up 75% of the data.

Lower quartile (Q3): This is the value at where the box in the box plot starts at the edge of the box. From this point to the left, all data values that fall within the bracket make up 25% of the data.

Median: this is the middle value at the point where the line divides the box and data below this point make up 50% of the data.

The other five-number summary are the maximum and the minimum values that are represented by the whiskers.

On the box plot given, 66 is at the extreme whisker at the left. This means that the percentage of data that is roughly greater than 66 is 100%.

Learn more about the box plot on:

brainly.com/question/14277132

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7 0
2 years ago
Which of the following is a composite number? A.87 B.31 C.59 D.41
kicyunya [14]
87 is a composite number because it is divisible by 3, all of the rest of the numbers are prime
8 0
4 years ago
4.
Reptile [31]

Answer:

c.) 7.5

Step-by-step explanation:

There is a part-to-whole relationship here.

2 customers : 8 minutes= ? customers : 30 minutes

                                         <em>or...</em>

2/8=x/30

Cross multiply:

8x=60

Divided both sides by 8:

x=60/8=7.5

I hope this helps!

8 0
3 years ago
Your work or words should justify your answer (explain how you know). As a math teacher, Josie frequently makes photocopies of f
Doss [256]

Answer:

Yes, because by dividing x by his equivalent y, you find a constant of proportionality being 10.

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Step-by-step explanation:

20 / 2 = 10

50 / 5 =10

60 / 6 = 10

70 / 7 = 10

7 0
3 years ago
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