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Levart [38]
3 years ago
15

(8k2x2+8k+5)-(3k2x2+5k+1)

Mathematics
2 answers:
MArishka [77]3 years ago
7 0
If you simply if would be: 10k^2+3k+4
Natalka [10]3 years ago
4 0

Answer:

Step-by-step explanation:

=5k^2x^2+3k+4

Hope this helps mark me as brainiest pls

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If ac =x+3 and db=3x-19, find ac
AveGali [126]
We need some sort of diagram to see what they are. Is there any way to say that ac = db? Either equal angles or equal lines. 
x + 3 = 3x - 19 Add 19
x + 3 + 19 = 3x Subtract x
21 = 2x
x = 21 / 2
x = 10.5

ac = 10.5 + 3
x = 13.5
 
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3 years ago
Susan spent a total of 45$ at the grocery store I’d this amount she spent $18 on fruit what percentage of the total did she spen
Ivenika [448]

Answer:

40% of the total was spent on fruit

Step-by-step explanation:

100%=45    x=18

100/x = 45/18    Now take the inverse of both sides

x/100 = 18/45

This leads to 1800 = 45x

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The total percentage spent on fruit was 40%

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2 years ago
(Sorry for it being so long, I just need help with these questions.)
sattari [20]

Answer:

1. c 2. a 3. b

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
a student walks 8 steps east 6 steps northeast 9 steps north west what is her displacement? include magnitude and direction
kati45 [8]

The displacement is 18.03 steps, and the direction is 47.25°

<h3>How to get the displacement?</h3>

We know that displacement is the difference between the final position and the initial position.

We assume the initial position (0, 0). Let's define the positive x-axis as the east and the positive y-axis as the north.

First, the student moves 8 steps east, so she is at:

(0 + 8, 0)

Then she moves 6 steps northeast, so the new position is:

(6*cos(45°) + 8,  6*cos(45°))

Finally, she moves 9 steps due north, so we have:

(6*cos(45°) + 8,  6*cos(45°) + 9)

Then the final position is:

(12.24, 13.24)

So the displacement is:

D = (12.24, 13.24) - (0, 0) =  (12.24, 13.24)

The magnitude of the displacement is:

|D| = \sqrt{12.24^2 + 13.24^2} = 18.03

So the magnitude is 18.03 steps.

And the direction is given by the arctangent of the quotient between the y-component and the x-component:

\theta = Arctg(13.24/12.24) = 47.25 \°

If you want to learn more about displacements:

brainly.com/question/4931057

#SPJ1

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2 years ago
Mark draws a card 50 times from a standard deck of 52 cards and gets a Heart 8 times. What is the experimental probability that
marysya [2.9K]
Good for Mark he’s a good man
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3 years ago
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