Hello so as you can see i got a ton of hw :) Helpp :')

Step-by-step explanation:

A. 1.13 and B is 1.37

A. $1.13

B. $1.37

Step-by-step explanation:

So the item costs $2.50 baseline but there is a 45% off sale.

Let P = the percentage off, x = the original cost, and y = the amount saved

Let's use the formula P% * x = y.

First we replace the variables with their values we know: 45% * 2.5 = y

(we remove the 0 on the end from 2.50 as it is redundant outside of money and this makes calculation a bit easier to read)

Next we need to convert 45% into a decimal, so we divide 45 by 100: 0.45 * 2.5 = y

Then multiply these values: 1.125 = y

We then round 1.125 to the nearest cent, and that finishes part A: We save $1.13

Now, we need to calculate the price we pay for the item, which is much simpler. Let p = the price we end up paying: 2.50 - 1.13 = p

Lastly, we need to subtract those two values: 1.37 = p

Therefore, we pay $1.37 for the item.

problem:

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

f(5/2) = 10/3

i hope this !