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Sergio039 [100]
3 years ago
9

Quadratic equation please help

Mathematics
1 answer:
Andre45 [30]3 years ago
7 0

Answer:

x= -3+√2 or x= -3-√2   ( answer : A  and B )

Step-by-step explanation:

hello :

x²+6x+9 = (x+3)².....identity

x²+6x+9 =2  means : (x+3)²=2

so : (x+3 = √2) or  (x+3 = - √2)

so two solutions :

x= -3+√2 or x= -3-√2

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4X + 8 < 1 + ( 2X - 5) PLEASE EXPLAIN
Simora [160]

Answer:

x < - 6

Step-by-step explanation:

Given

4x + 8 < 1 +(2x - 5) ← remove parenthesis

4x + 8 < 1 + 2x - 5, that is

4x + 8 < 2x - 4 ( subtract 2x from both sides )

2x + 8 < - 4 ( subtract 8 from both sides )

2x < - 12 ( divide both sides by 2 )

x < - 6

5 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
A battery is charged. The percentage of the battery’s capacity that is charged as a function of time (in minutes) is graphed.
igor_vitrenko [27]

Answer:

  A- 12 percent

Step-by-step explanation:

You can see on the graph that the charged percentage of capacity changes from 40 to 50 in 5 minutes. Then the increase in 6 minutes will be slightly more than 10 percent.

The linear rate is (10%)/(5 min) = 2%/min, so in 6 minutes it will be

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This calculation is consistent with our observation from the graph.

Every 6 minutes, 12 percent is added to the capacity.

3 0
3 years ago
Which of the following shows the correct evaluation for the exponential expression 6 over 7 to the power of 2?
yaroslaw [1]
For this case we have the following expression:
 6 over 7 to the power of 2
 (6/7) ^ 2
 By power properties we can rewrite the expression as:
 (6/7) * (6/7)
 Calculating we have:
 (6/7) * (6/7) = 36/49
 Answer:
 
6 over 7 times 6 over 7 equals 36 over 49
5 0
3 years ago
Give me the ans of this plss​
svet-max [94.6K]

Step-by-step explanation:

1. 9

2. 105

3. 8

4.0

Mark me branliest

7 0
3 years ago
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