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likoan [24]
3 years ago
10

Solve x2 + 6x + 7 = 0.

Mathematics
2 answers:
shtirl [24]3 years ago
3 0
The answer to the question

Anna007 [38]3 years ago
3 0

Answer:

Option b) negative 3 plus or minus square root of 2

Step-by-step explanation:

We are given a quadratic equation:

x^2 + 6x + 7 = 0

We use the quadratic formula to find the factors.

x = \displaystyle\frac{-b \pm \sqrt{b^2-4ac}}{2a},\\\\\text{a, b and c are coeficients of }x^2, x^1, x^0 \text{ respectively.}

Hence, comparing with the given equation, a = 1, b = 6 and c = 7

x = \displaystyle\frac{-6 \pm \sqrt{36-28}}{2}\\\\x = \displaystyle\frac{-6 \pm \sqrt{8}}{2}\\\\x = \displaystyle\frac{-6 + 2\sqrt{2}}{2}, \displaystyle\frac{-6 - 2\sqrt{2}}{2}\\\\x = -3 + \sqrt2, x = -3-\sqrt2

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Jada is training for a marathon. She wants to run a total of 25 miles this week. She will run the same distance each day for 6 d
8090 [49]

Answer:

4 1/6

Step-by-step explanation:

4 x 6 = 24

1/6 x 6 = 6/6 = 1

24 + 1 = 25 :)

8 0
3 years ago
How much confetti is dropped at the super bowl?
slamgirl [31]
About 3,000 pounds of confetti is dropped.
6 0
3 years ago
Pam started watching a movie at 2:53 P.M. The movie was 1 hour and 52 minutes long. After the movie, Pam rode her bike for 46 mi
Karo-lina-s [1.5K]

The time Pam got home is 5:25 pm.

<h3>How to calculate time </h3>

Remember that 60 minutes is equivalent to 1 hour. When adding minutes together, when the minutes exceeds 60, convert to an hour.

<h3>How to determine the time Pam got home</h3>

In order to determine the time she got home, add the time she used to watch the movie , to the time she used to ride her bike home to the time the movie started.

2:53 + 1:52 + 46 = 5:25 pm

To learn more about addition, please check: brainly.com/question/19628082

7 0
2 years ago
How do you do this?????
o-na [289]

y = 2x - 9

Step-by-step explanation:

Let's rewrite the given equation such that only y is on the left side and everything else on the right side:

3x + 6y = -30 \Rightarrow 6y = -3x - 30

Simplifying this by dividing by 6, we get

y = -\frac{1}{2}x - 5

This line has a slope of -1/2, which means that a line perpendicular to this has a slope of 2 (i.e., negative reciprocal). So we can write its equation as

y = 2x + b

This is the slope-intercept form of the equation of the line perpendicular to our given line. To complete this form, we need to find the value of b. Since this line passes through (1, -7), put these numbers into our equation to get

-7 = 2(1) + b \Rightarrow b = -9

Therefore, the slope-intercept form of the equation can be written as

y = 2x - 9

3 0
3 years ago
Witch is greater 15/4 or 17/5
Nady [450]
15/4 simplifies to 3 1/2 and 17/5 simplifies to 3 2/5 so 15/4 is greater
6 0
3 years ago
Read 2 more answers
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