I put 34.7x5.2 into a calculator and it’s 180.440 but when I do it it’s 179.94 why am I getting that number?

Misplacement of digits while doing multiplication manually.

Step-by-step explanation:

When 34.7 is multiplied by 5.2, is done by using the calculator, we will get 180.440

The same calculation when done manually, we will get,the answer as 180.44

While doing the multiplication manually, there may be some chance of misplacing the digits, so that the answer will be different.

2nd Option is correct.

Step-by-step explanation:

Given:

Renata has $20 in gift card.

She bought 16 songs.

After purchase Balance in gift card = $0

⇒ Cost of 16 songs = $20

⇒ Cost of 1 song = 20/16 = $ 1.25

let x represent number of songs purchased and y represent balance on her gift card.

So, Cost of x songs = 1.25 × x = 1.25x

And Balance = 20 - 1.25 x

Thus, Required equation representing relationship between balance on gift card and number of song purchased.

y = 20 - 1.25x

1.25x + y = 20

If we multiply both sides of equation with 4, we get

5x + 4y = 80

Therefore, 2nd Option is correct.