Question

Simplify 4a-5b-6a+7b ?

Answer 1

Check answers below.

Explanation:

1) `4a-5b-6a+7b`
First, place together all like terms (those with same variables, exponents, etc.)
= `4a-6a-5b+7b`
Simplify by doing the operations.
`4a-6a` = `-2a` and `-5b+7b` =`2b`
And when you put them together, you get:
`-2a+2b`.

*Realized that when I posted this you shortened the question to only answer one problem (above) so don't mind the rest down below unless you need answers for your other (deleted) problems.

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2) `15n+3n^4-4n+12n^4+n`
Do the same thing we did in 1)
= `3n^4+12n^4+15n-4n+n`
= `15n^4+12n`

3) `12n-2n^4-10n-2n^4+n`
Same process.
= `-2n^4-2n^4+12n-10n+n`
= `-4n^4+3n`

4) `5n+6n^4-7n+15n^4+13n`
Same process.
= `6n^4+15n^4+5n-7n+13n`
= `21n^4+11n`

5) 40 quarters, 30 dimes, 20 nickels, 10 pennies
`40*25` cents = `1000` cents
`30*10` cents = `300` cents
`20*5` cents = `100` cents
`10*1` cent = `10` cents

`1000+300+100+10` cents
= `1410` cents
or `$14.10`.

**take note for number 5 that I do not use the US currency so you might need to double check this answer

Hope this helped!