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Annette [7]
3 years ago
15

X^2 -x-20=0 Solve the equation by completing the square

Mathematics
1 answer:
Igoryamba3 years ago
4 0
X=4
first you add 20 to both sides
then you try all numbers that square to get less than 20 and 4 is the correct one
You might be interested in
Which model shows 25%? ​
Stels [109]

Answer:

The  first one shows 25%

In the 1st modal, a whole is divided into 4 and 1 of the 4 is selected or highlighted

And as the whole rectangle is 100% and being divided into four its becomes 100/4% and when we solve we get 100/4=25

And thus its the first modal that shows 25%

In the second case its divide into 3 boxes so.. 100/3% and when we solve we get 33.3333333.......and this is not what we want

THEREFORE, THE CORRECT ANSWER IS 1ST MODAL

8 0
2 years ago
An air traffic controller is tracking two planes. To start, Plane A is at an altitude of 4385 feet and Plane B is at an altitude
Fantom [35]

Answer:

60 seconds, 7715 feet

Step-by-step explanation:

Plane A and B start out 615 feet apart, and we find this by subtracting the height of plane A from plane B, getting 5000-4385=615. Now we have to find how many more feet of altitude plane A is gaining per second over plane B.

To find this we subtract 45.25 from 55.5 and get 10.25 feet per second. Now to find out how many seconds until they'll be at the same altitude we simply divide 615 by 10.25, getting 60 seconds.

For the second part, to find the altitude at this point, we simply multiply the altitude gain of one of the planes per second by the time of 60 seconds to get how much altitude they gained over that time, and add it to the starting altitude. Doing this with plane B we get 45.25*60=2715, and we add that to 5000 to get the final answer of 7715.

4 0
3 years ago
Whats going on in this attachment help thanks xD
rodikova [14]

Ratio remains same

\\ \rm\Rrightarrow \dfrac{4}{6x-3}=\dfrac{3}{2}

\\ \rm\Rrightarrow 8=3(6x-3)

\\ \rm\Rrightarrow 8=18x-9

\\ \rm\Rrightarrow 18x=17

\\ \rm\Rrightarrow x=17/18

7 0
2 years ago
a triangular pyramid has a volume 150 cubic centimeters. which of the following represents the volume of a triangular prism with
soldi70 [24.7K]
Wouldn't it be 150 cubic centimeters? Since it has the same area of base and height, it would be the same prism.
5 0
3 years ago
1859 divided by 45 eeeee
kvv77 [185]

Answer:

41.3111111111

Step-by-step explanation:

1859/45 = 41.3111111111

3 0
3 years ago
Read 2 more answers
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