Question

simplify the expression
0.4y^2+0.3y^2-0.2y^2

Answer 1

i have 0.5^2

Answer 2

0.5y^2

Answer 3

Sounds like you know how to do it :)

I was going to explain it more, but that's correct :)

Answer 4

thank ya

Answer 5

since they're all y^2 terms, you just add and subtract

Answer 6

well could you help me with this one

Answer 7

eight times a number minus four times the same number
type an expression using x as variable
Than simplify expression is ?

Answer 8

ok, so instead of "a number", let's use x as the variable since that's what the problem suggests.

"eight times a number" means 8 times x, or 8x
four times the same number means 4 times x, or 4x

then, to subtract them, you write the expression 8x - 4x
Then simplify.

Does that make sense?

Answer 9

yeah it does so i get = -4x

Answer 10

or 4x

Answer 11

4x is better.

If you are confused, try a simple x value that makes the math easy... let x = 1.

8 times a number (1) minus 4 times the same number (1) = 8(1) - 4(1) = 4(1)

Answer 12

oh ok i will do

Answer 13

4x is the right solution though. if you wrote 4x-8x, you would have written the subtraction backward.

Answer 14

how long are you on here

Answer 15

Not sure... a bit, but not all day.

Do you have another question?

Answer 16

yeah

Answer 17

0.007x$1710 for the cost of a car

Answer 18

i got $119.7 calculated

Answer 19

just multiply, right?

Answer 20

the cost of the car is multiplied by 0.07 the result is 1710

Answer 21

yeah j multiply

Answer 22

and it says round to the nearest whole number

Answer 23

I think you multiplied by the wrong number:
1710 x 0.007 = 11.97

When you did it, you got 119.7... looks like you accidentally multiplied 1710 x 0.07

So, rounding $11.97 to the nearest whole number, what do you get?

Answer 24

well it has 0.07 and $1710

Answer 25

i did do that

Answer 26

oh, my fault then, you are right :)

Answer 27

you just mistyped it when you asked me up above... you had 0.007

No worries... so it's 119.7, rounded to 120, right?

Answer 28

yeah

Answer 29

so the answer is $120 for a car lol

Answer 30

Your math is right :) but that doesn't mean the question is very smart :)

Answer 31

well i looked at another example and they divide by like 0.07 by 1710 after multiplying

Answer 32

do u think its 120,000

Answer 33

hm. is there more to the problem than multiply 1710 by 0.07? Is it a word problem?

Answer 34

well i was looking at how someone did it on weegy

Answer 35

guessing is risky, but if you took 1710 divided by 0.07 instead of multiplying, you would get 16,714... that's a more reasonable price for a car.

Answer 36

oh ok well thats how they did it but the problem is asking multiply but oh well we did great

Answer 37

but without knowing the full question, I'm unsure.

If your problem is just: 1710 x 0.07, then the answer is 119.70 or 120. But if there is a word problem about the car purchase price, we can work through the whole thing.

Answer 38

When the costs of the car multiplied by 0.07 the result is $1710. find the cost of the car

Answer 39

thats what it exactly says

Answer 40

Oh!! Good... we didn't do that earlier... let's fix it.

Answer 41

lol ok

Answer 42

(cost of car) x 0.07 = 1710 Does that make sense as a starting point?

Answer 43

so its 24428.57

Answer 44

yes :) Nice job. Don't forget to round.

Answer 45

24,430

Answer 46

i think

Answer 47

hello

Answer 48

jake is that right

Answer 49

no, nearest whole number be would 24,429 (sorry for delay... browser messed up)

Answer 50

oh thanks

Answer 51

you're welcome, glad to help