Question

A purse containing $3.20 in quarters and dimes has, in all 20 coins. Find the number of each kind of coin. help x.x

Answer 1

this looks mighty familiar

Answer 2

i know but i have trouble applying to algerbraic expressions. sorry if im a pain. :(

Answer 3

q + d = 20
.25q + .1d = 3.2

Answer 4

solve it like you did the last one exactly
start with \(25x+10(20-x)=320\) as you did before right?

Answer 5

Solve for d in the first equation as @satellite73 showed

Answer 6

then substitute that value into the second (bottom) equation for d.

Answer 7

then just as before, multiply out via the distributive law to get
\[25x+200-10x=320\] combine like terms to get
\[15x+200=320\] and two more steps

Answer 8

@xxjennxx123 you see that this is almost identical to the last one right?
only difference is the numbers, but the method and steps are the same

Answer 9

yeah i see it i just have trouble applying these skills :(

Answer 10

that is why you have homework
and you are not being a pain, lots of people will be happy to answer

Answer 11

awuh thank you :')

Answer 12

pretty much when solving a linear equation you have to follow the steps
remove parentheses using distributive law
combine like terms
add or subtract to get variable on one side, number on the other
multiply or divide to get the variable by itself

Answer 13

not always, but mostly

Answer 14

i try to take my time with these questions, but the teacher moves on so fast. =/

Answer 15

He or She have tutoring?

Answer 16

You've got to take advantage of it if they do. "Too fast" is something you can discuss with them during tutoring hours.

Answer 17

yeah, well it just gets worse, sorry to say
they get faster and faster the higher up you go
by the time you take calculus 12 they will go so fast it will break the sound barrier

Answer 18

ohhh..

Answer 19

Lol @satellite73 . It's not that bad @xxjennxx123. Trust me.

Answer 20

You mature as you move up in math. You'll be ok. Just go to tutoring. NOW.

Answer 21

trust me, it is worse than i said

Answer 22

It's not. Don't do that to her! LOL!!

Answer 23

ok kidding and anyway there is no such thing as calculus 12

Answer 24

FACT!

Answer 25

ohhh

Answer 26

I actually thought you meant calculus in 12th grade @satellite73! Madness...calculus 12!!
: )

Answer 27

Anyway @xxjennxx123 seriously, use tutoring. Don't be lazy. Take care...later

Answer 28

okk haha i will thanks for the encouragement. :)