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Colt1911 [192]
3 years ago
14

What two numbers add up to 9 and multiply to -90?

Mathematics
1 answer:
Alik [6]3 years ago
3 0
You solve the equation : t^2 - 9t - 90 = 0 ;
Δ = ( - 9 )^2 - 4 * 1 * ( - 90 ) = 81 + 360 = 441 ;
t1 = ( 9 + \sqrt{441}) / 2 = 30 / 2 = 15 ;
t2 = ( 9 - \sqrt{441}) / 2 = -12 / 2 = - 6 ;

The numbers are 15 and - 6 ;
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Answer:

rational

Step-by-step explanation:

both 8 and 12 are rational and we are adding rationals number

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3 years ago
What is 5 4/8 + 3 5/8 equal?
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8 0
2 years ago
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Answer:

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Refer attachment for graph.

Step-by-step explanation:

Given: when Zane was 20 meters below the edge of a volcano. He heard some rumbling, so he decided to climb up out of there as quickly as he could. He managed to climb up 4 meters each second and get out of the volcano safely.

We have to graph Zane's elevation relative to the edge of the volcano (in meters) as a function of time (in seconds).

Let he takes x seconds to get out of the volcano.

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Thus, The equation that represent Zane's elevation relative to the edge of the volcano (in meters) as a function of time (in seconds). is given by

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Plot this and obtained the graph for the given equation as attached below.

 

6 0
3 years ago
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80 x 25 = n<br> Expanded form <br> 80 x ( ) <br> Partial product <br> 80 x 20=<br> 80 x 5 =
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9514 1404 393

Answer:

  2000

Step-by-step explanation:

Expanded form:

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Partial products:

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Step-by-step explanation:

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