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WITCHER [35]
3 years ago
5

What is 7x^2-8x-9=-3x rounded to the nearest hundredth

Mathematics
1 answer:
jonny [76]3 years ago
5 0

Answer: 1.55, and -0.83

Step-by-step explanation:

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3 years ago
The quadratic function f (x) = - 45x2 + 350x + 1,590 models the population of a city where x represents the number of years sinc
kramer

Answer: 2,215,000

Step-by-step explanation:

Given: The quadratic function f (x) = - 45x^2 + 350x + 1,590 models the population of a city where x represents the number of years since 2005.

To Find:  population of the city in 2010

We need to put x= 2010-2005 = 5

f (5) = - 45(5)^2 + 350(5) + 1,590\\\\=-1125+1750+1590 =2215

Hence, the estimated population of the city in 201 = 2215 thousands or 2,215,000 .

3 0
3 years ago
The perimeter of a rectangle is 56 inches. The rectangle is 20 inches long. How wide is the rectangle?
Mamont248 [21]

Answer:

The answer is A 8 inches

Step-by-step explanation:

If the perimeter is 56 inches and it is 20 inches long, then you would multiply 20 by two and get 40, then you subtract 40 from 56 and get 16. Finally, you divide 16 by two and get 8. So, A 8 inches will be your answer.

5 0
3 years ago
Point J is on line segment IK. Given JK = 8 and IJ = 7, determine the length IK.​
masha68 [24]

Answer:

15

Step-by-step explanation:

If the line segment is IK, that means IJ+JK=IK. So, 7+8=15

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I need help ASAP. show work. So I can learn :)
damaskus [11]

it would be a because nothing else makes sense

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