3 years ago

Plz answer correctly. its for a test

Mathematics

1 answer:

4vir4ik [10]3 years ago

5 0

Answer:

the third one

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Also can anyone help with these problems too?

d1i1m1o1n [39]

Answer:

6. a

------

7. b

------

8. d

------

9. d

------

7 0

3 years ago

Find the value of k by<br>quardractic equation two real and equal roots<br>5x - 2kx +20=0

kotegsom [21]

Answer:

k = +10 or -10

Step-by-step explanation:

It's given in the question that the roots of the eqn. are real and equal. So , the discriminant of the eqn. should be equal to 0.

$= > {b}^{2} - 4ac = 0$

$= > {( - 2k)}^{2} - 4 \times 5 \times 20 = 0$

$= > 4 {k}^{2} - 400 = 0$

$= > 4( {k}^{2} - 100) = 0$

$= > {k}^{2} - 100 = 0$

$= > k = \sqrt{100} = + 10 \: or \: - 10$

3 0

2 years ago

Read 2 more answers

Solve Start Fraction one-third over 5 end Fraction = Start Fraction a over 20 End Fraction

Vadim26 [7]

Answer:

ITS C

Step-by-step explanation:

TRUST ME

3 0

3 years ago

2. What is the distance between the points M(-8,11) and N(3,7)?

ivolga24 [154]

Answer:

I'm not sure I feel like it's A

Step-by-step explanation:

-8 is 11 units away from 3 but I do not know where the 7 came from for answer A.

If I were you I would not trust my answer

6 0

3 years ago

6.5 kg to 3.9 kg, what was the percent decrease

igomit [66]

Answer: 40%

Step-by-step explanation:

Given,

Initial mass = 6.5kg

final mass = 3.9kg

So, Change in mass = initial mass - final mass

= 6.5 - 3.9

= 2.6 kg

and,

Change in percentage of mass = $\frac{change in mass}{original mass} * 100$

Change in percentage of mass = $\frac{2.6}{6.5} * 100$

= 40

6 0

3 years ago