Question

Add.
0.15x^4 + 0.10x^3 - 0.9x^2
- 0.01x^3 + 0.01^2 + x
1.25x^4 + 0.11x^2 + 0.01
0.27x^3 + 0.99
-0.35x^4 + 15x^2 -0.03

Answer 1

I cannot follow what we are to add.

Answer 2

this is how the problem was set up and it just says to add

Answer 3

Okay, the like terms have already been grouped. I should have noticed. Sorry.

Answer 4

thats ok, can you help me out please?

Answer 5

Yes, add the three terms with x^4 in them. They are like terms. Post what you get here. We'll do this in parts.

Answer 6

0.15x^4+1.25x^4+-0.35x^4=1.75x^4

Answer 7

0.15x^4 + 1.25x^4 - .35x^4 = 1.05 x^4, I think. Did you subtract the -.35?

Answer 8

no i added it

Answer 9

0.10x^3+0.01x^3+0.27x^3=0.38x^3

Answer 10

Let's look at the coefficients: .15 +1.25 -.35 = 1.40 - .35 = 1.05. 1.05 x^4.
We need to agree on the x^4 terms before we move to the x^3.
Please check your work with the x^4 terms. Thanks.

Answer 11

so you add those together and then subtract the .35?

Answer 12

Yes

Answer 13

ok got it

Answer 14

0.10x^3 - 0.01x^3 + 0.27x^3 = .36 x^3 . I will check my answer for the cubes. Please check yours.

Answer 15

ok i added the 0.01x^3 instead of subtracting thats why my answer was 0.38^3 instead of 0.36^3

Answer 16

im following you now

Answer 17

Hey, I'm counting on you to check my work, too. These decimals are always tedious.
Okay, next up: the squares.
Here's what I got:

- 0.9x^2 + 0.01x^2 + + 0.11x^2 = -.78 x^2

And, you?

Answer 18

you left out the 0.15x^2

Answer 19

i got -1.17x^2

Answer 20

Good eye. I missed it.

- 0.9x^2 + 0.01x^2 + + 0.11x^2 + 15x^2 = 14.22x^2.
Hey, that is a 15x^2 and not .15x^2, right?

Answer 21

its suppose to be 0.15x^2

Answer 22

sorry

Answer 23

- 0.9x^2 + 0.01x^2 + + 0.11x^2 + .15x^2 = -.63x^2

Answer 24

i dont know what i did wrong on this one but i didnt get that

Answer 25

i think i added a extra 0 to 0.9x^2

Answer 26

yes thats where i messed up

Answer 27

-.9 + .01 = -.89
.11 + .15= .26
-------
-.89 +.26 = -.63 for the x^3 coefficient

Answer 28

yea i added a 0 and i shouldnt have

Answer 29

0.01+0.99-0.03=.97

Answer 30

Okay, is there only one x term? If so, then, 1x for that and we need to do the constants term sum.

Answer 31

yea it is just x

Answer 32

0.01 + 0.99 -0.03= -.63

Answer 33

how do we do the constants term sum?

Answer 34

These are the constants. Constants don't have an x in them.
0.01+0.99-0.03=.97

Answer 35

ok gotcha

Answer 36

My constant sum is not right. Let me check.

Answer 37

ok

Answer 38

0.01 + 0.99 -0.03 = .97

Okay, let's put it all together.

Answer 39

1.05x^4+0.36x^3+-0.63x^2+.97=

Answer 40

0.15x^4 + 1.25x^4 - .35x^4 +0.10x^3 - 0.01x^3 + 0.27x^3 - 0.9x^2 + 0.01x^2 + + 0.11x^2 + .15x^2 + x + + 0.01 + 0.99 -0.03=

1.05 x^4 +.36x^3 - .63x^2 +x + .97. That's all we can do because these are not like terms and can't be further simplified.

Answer 41

Did you forget the x?

Answer 42

oh ok i thought i had to add them all together to get my final answer

Answer 43

yes i did

Answer 44

The x is part of the sum.
We can't add all of this string together because the terms all have different "last names." By that I mean, x^4, x^3, and so forth. Note that the ones we added to simplify were all of the same last name.

Answer 45

This is it for the answer:

1.05 x^4 +.36x^3 - .63x^2 + x + .97.

Answer 46

ok im following you and you are a great tutor. Are you on here all the time because I am terrible at math and you have helped me understand this.

Answer 47

I try to be on here often. If we "fan" each other, we can tell when we are on by the green dot.

Answer 48

ok because I could really use your help

Answer 49

See the attached file. Five of my fans are online now.
But you have to fan me if you want to see if I am online.

Answer 50

Click on the green Directrix and then you'll see a tab to click for "Become a Fan."

Answer 51

ok thanks