Question

Evaluate the polynomial for x=7, when x=7, 3x^2-5x+6=

Answer 1

\[3(7)^2-5(7)+6\]

Answer 2

\[3(49)-35+6\]
\[147-35+6\]
\[118\]

Answer 3

thank you

Answer 4

no problem

Answer 5

im happy to help. do you need help on anything else?

Answer 6

yes, please, I not a math wiz. Here is the next problem. If the sides of a square are lengthened by 6cm, the area becomes 196cm^2. Find the length of a side of the original square. The length of a side of the original square is _cm.

Answer 7

alright so you are dealing with a square which have 4 sides and each side was lengthened by 6cm

Answer 8

which is and extra 24cm right?

Answer 9

right

Answer 10

each side is equal so from here you are going to subtract 24 from 196 and get 172\[196-24=172\]
\[172\div4\]
43cm for each side

Answer 11

so the original lenghth of the square is 43cm but after it is 49cm. was that helpful?

Answer 12

Yes, that was very helpful, thank you so much for helping me.

Answer 13

no problem if you ever need any help you are welcome to message me at any time

Answer 14

If you are not busy, I would very much like your help this afternoon. I have some other problems I am not sure of.

Answer 15

Jack usually mows his lawn in 6 hours. Mary can mow the same in 3 hours. How much time would it take for them to mow the lawn together? They can mow the lawn in _hrs if they work together..

Answer 16

it would take them about 4.5 hours, that is what i calculated by taking half of each of there time and adding it together