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4 years ago

How many real solutions does the equation 0.2x^5-2x^3+1.8x+k=0 have when k = 0?

1 answer:

5 0

When k = we have:-

0.2x^5 - 2x^3 + 1.8x = 0

so x = 0 is one solution

taking 0.2x out we have:-
0.2x( x^4 - 10x^2 + 9x) = 0

factoring::-

(x^2 - 9)(x^2 - 1) = 0

this gives x = +/= 3 and x = +/- 1

so there are 5 real solutions

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Without using a calculator, determine the number of real zeros of the function

natta225 [31]

There should be a total of 3 zeros because the largest exponent is 3.

8 0

3 years ago

GET 15 POINTS NOWWWWWWWWW!!!!

anzhelika [568]

Slope = 2/5 ; Passes through (-4, -7) ; Point-slope form

point-slope form : y-y₁=m(x-x₁)

Simply plug everything in :)

Remember !! m=slope

y - (-7) = 2/3(x - (-4))

Simplify.

y + 7 = 2/3(x + 4)

*Some teachers want this simplified more so here's the simplest answer :

y + 7 = 2/3x + 8/3 *

~Hope I helped!~

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4 years ago

Match the vocabulary word with the correct definition.

Zolol [24]

Answer:

1. edge

2. cone

3. decompose

4. cubic units

5. cylinder

6. cube

7. composite figure

8. base

9. area

10. dimensions

8 0

2 years ago

3600 dollars is placed in an account with an annual interest rate of 5.5%. To the nearest year, how long will it take for the ac

Lynna [10]

Answer:

14.44

Step-by-step explanation:

The formula says

A=p(1+r)^t

A 7800

P 3600

R 0.055

T ?

7800=3600(1+0.055)^t

7800/3600=(1.055)^t

Log(7800/3600)= t × log(1.055)

T=log(7800/3600)/log(1.055)

T= 14.44 years

7 0

3 years ago

A small airplane flies 750 miles with an average speed of 250 miles per hour. 1.75 hours after the plane leaves, a Boeing 747 le

sleet_krkn [62]

Answer:

The average speed of the 747 was of 600 miles per hour.

Step-by-step explanation:

A small airplane flies 750 miles with an average speed of 250 miles per hour.

Velocity is distance divided by time, and here, we find the time of the small airplane. So

$v = \frac{d}{t}$

$250 = \frac{750}{t}$

$250t = 750$

$t = \frac{750}{250}$

$t = 3$

1.75 hours after the plane leaves, a Boeing 747 leaves from the same point. Both planes arrive at the same time;

This means that it traveled 750 miles in 3 - 1.75 = 1.25 hours.

What was the average speed of the 747?

$v = \frac{d}{t} = \frac{750}{1.25} = 600$

The average speed of the 747 was of 600 miles per hour.

4 0

3 years ago