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NARA [144]
3 years ago
13

Use the quadratic formula to solve x² + 7x + 8 = 0. What are the solutions to the equation? Round irrational solutions to the ne

arest tenth.  
x=−6.9 and x=−0.15
x=−7 and x=−1
x=−5.6 and x=−1.4
x=−8 and x = 1

Mathematics
2 answers:
Arisa [49]3 years ago
7 0
X=-5.56 and x=-1.4
I got it from doing the quadratic equation
nirvana33 [79]3 years ago
3 0
Option 3 is correct


check the image for explain

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IceJOKER [234]
It’s 2 because it starts at 6 and the next time the line meets a point is at (4,-1) you go down one and over two and you put x/y so it’s 2/1 which is 2. I think that’s right
5 0
3 years ago
Mark incorrectly solved the inequality -4(5/2+3/2x) > 8. His work is shown. Which step shows an error based on the inequality
aliya0001 [1]

Answer : The incorrect step is, (A) step 1: -10 + 6x > 8

Step-by-step explanation :

The given expression is:

-4(\frac{5}{2}+\frac{3}{2}x)>8

Now solving this expression step by step.

First -4 distributed over parentheses.

(-4\times \frac{5}{2})+(-4\times \frac{3}{2}x)>8

Now solving bracket term, we get:

-10-6x>8

Now taking like terms together, we get:

-6x>8+10

-6x>18

-x>3

Now multiplying this expression by (-1), we get:

x>-3

Thus, the incorrect step is, (A) step 1: -10 + 6x > 8

5 0
3 years ago
rebecca is buying a couch for her house. she gets to pick it out, but her roommate has to approve it. the probability of rebecca
Elena L [17]

Answer:

The answer is 42.5%

Step-by-step explanation:


5 0
3 years ago
what key feature(s) can be easily identified from factored form? explain how each key feature is related to the roller coaster.
Ulleksa [173]

Answer:

Step-by-step explanation:

With a factor of (t - 1) we know that zero (ground level) is reached at 1 second from an initial height of (0 - 1)(0 - 1)(0 - 11)(0 - 13)/3 = -1•-1•-11•-13 / 3 = 47⅔ meters at t = 0

As we have <em>two </em>factors of (t - 1) we know the track does not go underground at t = 1, but rises again.

At t = 11 seconds, the car has again returned to ground level, but as we only have a single factor of (t - 11) the car plunges below ground level and returns to above ground level at t = 13 seconds due to the single factor of (t - 13)

we can estimate that the car is the deepest below ground level halfway between 11 and 13 s, so at t = 12. At that time, the depth will be about (12 - 1)(12 - 1)(12 - 11)(12 - 13) / 3 = -(11²/3) = - 40⅓ m.

we can estimate that the car is the highest above ground level halfway between 1 and 11 s, so at t = 6s. At that time, the height will be about (6 - 1)(6 - 1)(6 - 11)(6 - 13) / 3 = 5²•-5•-7 / 3 = 291⅔  m.

It's obvious that the roller coaster car had significant initial velocity at t = 0 to achieve that altitude from an initial height of 47⅔ m

6 0
3 years ago
David ran for president of the chess club, and he received 76 votes. there were 80 members in the club. what percentage of the c
TEA [102]
76 out of 80 people for David.

Therefore, 76/80 people for David.

Further simplifying, every 19 out of 20 people voted for David.

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5 0
4 years ago
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