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Free_Kalibri [48]
2 years ago
15

Which of the following is an equation? x+y 2x – 7 = 13 3x + 5y > 9 3x + 5y - 9

Mathematics
1 answer:
Gelneren [198K]2 years ago
6 0
2x -7=13 is an equation because it has an equal sign.
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Tran is solving the quadratic equation 2x2 – 4x – 3 = 0 by completing the square. His first four steps are shown in the table.
natulia [17]

The solution to the quadratic equation 2x² - 4x - 3 = 0 is x = 1 ± √2.5

<h3>What is an equation?</h3>

An equation is an expression that shows the relationship between two or more numbers and variables.

Solving the polynomial using completing the square:

2x² - 4x - 3 = 0

First divide through by 2:

x² - 2x - 3/2 = 0

add 3/2 to both sides:

x² - 2x - 3/2 + 3/2 = 0 + 3/2

x² - 2x = 3/2

add the square of half the coefficient x to both sides:

x² - 2x + 1 = 3/2 + 1

(x - 1)² = 2.5

taking square root:

x - 1 = ±√2.5

x = 1 ± √2.5

The solution to the quadratic equation 2x² - 4x - 3 = 0 is x = 1 ± √2.5

Find out more on equation at: brainly.com/question/2972832

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7 0
1 year ago
How do I choose a method to find the product
Mrrafil [7]
What do you mean? 
It's ok.
here's an example of product..
3 X 5 = 15.
7 0
3 years ago
A person's resting heart rate is typically between 60 and 100 beats per minute. Noah looks at his watch, and counts 8 heartbeats
Pavlova-9 [17]

Answer:

No, his heartbeat is 48 beats per minute (12 beats below the minimum beats per minute of a typical person's heartbeat (60 beats)).

Step-by-step explanation:

Every 10 seconds, Noah's heart beats 8 times.

Therefore, every 1 minute, his heart beats 48 times.

Noah's heartbeat is below a typical person's resting heart rate.

4 0
3 years ago
Which phrase provides the best definition of sedimentary rocks?
Alexxandr [17]
Option 3 is the best choice
5 0
3 years ago
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Reggie starts his card collection with 195 trading cards in week 1. Each week after this, he purchases 16 more trading cards. Ho
Arturiano [62]
195 in week 1
each week after, he purchased 16 more each week
how much after week 12

195 + 16(11) = 195 + 176 = 371 <== ur answer is $ 371
4 0
3 years ago
Read 2 more answers
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