80 POINTSSolve for x. Use the completeing the square method. x^2+8x=7
Answers
Answer:
x = -4 ±√23.
Step-by-step explanation:
x^2 + 8x = 7
(x + 4)^2 - 16 = 7
(x + 4)^2 = 23
x + 4 = ±√23
x = -4 ±√23.
Answer: The correct answer is C.
Step-by-step explanation:
⇒
⇒ which is also,
⇒ So, is a square root of 23.
⇒ Then, it could be positive or negative one:
So that's why the answer would be C.
* Mark me the Brainliest:)) Hope this helps:)
Related Questions
PLEASE HELP ME AGAIN, I REALLY NEED IT.
Mikaela friends brought a big box of crackers to the movies. 53 crackers are whole wheat and 29 are cheese flavored. The remaining 1/3 of the box contains sesame seeds crackers. how many crackers are in the box altogether?
What is the product of 4 and 2/3
Without using 10, show directly that (17.6-1)8 = 17.6-8
Answers
8.4 / 0.03 would be 280.
Hope this helps! :)
1. Describe a situation that models a linear pattern and then describe a situation that models a nonlinear pattern. Do not state which situation is linear and which is nonlinear.
Your classmates will need to determine which is which and then write a function that models the linear situation.
Your classmates will also need to write 1 ordered pair that is a solution to the linear function and explain its meaning in the context of the situation.
Answers
Linear Pattern: A person is paid $10 for every hour they work. Before they start working, they are given an additional $5. They receive no raises in their pay.
This is linear because the pay is constant, and they aren't receiving any additional money. The equation for this would be y = 10x+5, x is the amount of hours they work.
Non-Linear Pattern: A person is paid $10 for every hour they work. Before they start working, they get are given an additional $5. For every 30 minutes they work after hour 4, they receive a $1 raise.
This is non-linear because the pay, after a certain amount of time, would go up, and the graph would soon start going higher after hour 4.
An ordered pair for the linear would be: (5, 55)
After working 5 hours, they would have $55.
An ordered pair for the non-linear would be (5, 56)
After working for 5 hours, they would have $56.
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Answers
2×(6 m - 1.5 m) = 9 m
_____
A diagram can help you see the similar triangles.
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How many quarts are in a pint?
Answer: 0.499999 or 0.49
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smallest side of 1 right triangle to smalles side of other right trigle shoudl be same as largest side of 1 right trignale to largest side of other right triangle and also middle side
6:10 should equal 10:26 should equal 8:24
treat as fraction
6/10=10/26=8/24?
3/5=5/13=1/3
we know that 3/5 is not equal to 1/3 so they are NOT SIMILAR
ratios are
3:5
1:3
5:13
the perimiter of the smaller is 6+8+10=24
perimiter of larger is 10+24+26=60
ratio of perimiters larger to smaller is 60:24=5:2
area is 1/2 base times height
longest side=hypotonuse
therefor other 2 sides must be base and height
area of smaller=8 times 6 times 1/2=24
area lf larger=10 times 24 times 1/2=120
ratio of larger ot smaller is 120:24=5:1
not similar
ratio of perimiter larger to smaler=5:2
ratio oif area larger to smaller=5:1