Savanna is playing a game with her friends. She tells them to each pick a number, and then she directs them to: 1. Multiply their number by 4 2. Subtract 6 from that number 3. Divide that number by 2. Once they do that, they each tell Savanna their number a. Arturo says his "new" number is -15. What number did Arturo start with? b. Summer says her "new" number is 18. What number did Summer start with?c. Ryan says his "new" number is 199. What number did Ryan start with?

a) -6

b) 10.5

c) 101

Step-by-step explanation:

Let x represent the number that they picked.

1. Multiply their number by 4

x × 4 = 4x

2. Subtract 6 from that number

4x - 6

3. Divide that number by 2.

(4x -6)/2

a) Arturo says his "new" number is -15.

(4x -6)/2 = -15

Solving for x.

4x -6 = 2 × -15

4x = -30 + 6 = -24

x = -24/4 = -6

b) Summer says her "new" number is 18

(4x -6)/2 = 18

Solving for x

(4x-6) = 18 × 2 = 36

4x = 36 + 6 = 42

x = 42/4 = 10.5

c) Ryan says his "new" number is 199

(4x -6)/2 = 199

Solving for x

4x -6 = 199×2 = 398

4x = 398+6= 404

x = 404/4 = 101

answer: it is d

step-by-step explanation:

the final amount you will pay is $68.04.

the tip is determined by the pre-tax amount, so we calculate the tip based on the original bill, not after we've added sales tax.

to find the tip:

we can divide 54.00 by 100 to get 1% of 54. then we multiply that by 18.

54 / 100 = .54

.54 x 18 = 9.72

tip = 9.72$

to find the tax:

we can divide 54.00 by 100 to get 1% of 54. then we can multiply that by 8 to get 8%.

54 / 100 = .54

.54 x 8 = 4.32

tax= 4.32

now we can add the tip and tax to the bill to get our total.

54 + 9.72 + 4.32 = 68.04

total: $68.04

step-by-step explanation: