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Scorpion4ik [409]
3 years ago
15

2k^2-5k-18=0 what is both of the values of k? plz help!!! 15 pts!!!

Mathematics
1 answer:
ddd [48]3 years ago
5 0
To factor quadratic equations of the form ax^2+bx+c=y, you must find two values, j and k, which satisfy two conditions.

jk=ac and j+k=b

The you replace the single linear term bx with jx and kx. Finally then you factor the first pair of terms and the second pair of terms. In this problem...

2k^2-5k-18=0

2k^2+4k-9k-18=0

2k(k+2)-9(k+2)=0

(2k-9)(k+2)=0

so k=-2 and 9/2

k=(-2, 4.5)
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Answer:

3j/3—5/3

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on the same bus, 1/3 of the French speakers can also speak German. how many people can speak both German and French
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1/3 OF the 4/9 French OF people on the bus (27) also speak German.

Of= Multiply

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3 0
3 years ago
Square is 19 yd.² what is the length of each side
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6 0
3 years ago
Mark and Trisha are traveling in the same direction and Mark is going 16 miles per hour. Trisha is going 12 miles per hour but s
Lorico [155]

Answer:

32 miles

Step-by-step explanation:

Given data

Let the total distance be x miles

Marks speed= 16miles per hour

Trisha's speed= 12 miles per hour

Trisha has covered 8 miles and has  (x-8) miles to finish line

We know that

Speed= distance/time

time= distance/speed

Hence the time taken for Mark to finish is

time= x/16---------------1

The time taken for Trisha to finish is

time= (x-8)/12-----------2

equate 1 and 2 above

x/16= (x-8)/12

cross multiply

16(x-8)= 12*x

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collect like terms

16x-12x= 128

4x=128

x= 128/4

x= 32 miles

Hence they will meet at exactly 32 miles along the way

5 0
3 years ago
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