You are buying batteries, a stereo, and some CDs from the I. B. Electronics store. You can buy from this store online or in a physical store.

Step-by-step explanation:

Just add them all up.

Physical first.

With the given number of things getting bought this amounts to 2*5.99 + 100 + 3*7.95.  Adding these up gets to 135.83.

Now, the discount multiplies it by .9 and the tax multiplies it by 1.05. It doesn't matter which oder we do it in.  so the calculation is 135.83 * 1.05 * .90 = 128.36

So that's the physical store.  Next is online.

Here the prices are 2*4.99+90+3*8.95=126.83.  Online there is an additional fee of 6.99, so just add that 110.93.  Then there is 5 dllars off, so just subtract that to get  128.82

So the physical store is cheaper by less than a dollar.

Let me know if you didn't understand anything.

22 and 22

step-by-step explanation:

10 plus 12 equals 22.

12 plus 10 also equals 22 because regardless of what order they're in, they're gonna equal the same thing.

3/4 ÷ 3/4

step-by-step explanation:

basically divide any proper fraction with itself to fit the criteria.

so if we are using 3/4, then:

3/4 ÷ 3/4 = 1

so 1 is the quotient.

and the numerators for both these fractions is 3.   and if we divide the numerators:

3 ÷ 3 = 1

we see that quotient is equal to our original quotient as well.