Answer:
Step-by-step explanation:
Simplifying
3.4 + 2(9.7 + -4.8x) = 61.2
3.4 + (9.7 * 2 + -4.8x * 2) = 61.2
3.4 + (19.4 + -9.6x) = 61.2
Combine like terms: 3.4 + 19.4 = 22.8
22.8 + -9.6x = 61.2
Solving
22.8 + -9.6x = 61.2
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-22.8' to each side of the equation.
22.8 + -22.8 + -9.6x = 61.2 + -22.8
Combine like terms: 22.8 + -22.8 = 0.0
0.0 + -9.6x = 61.2 + -22.8
-9.6x = 61.2 + -22.8
Combine like terms: 61.2 + -22.8 = 38.4
-9.6x = 38.4
Divide each side by '-9.6'.
x = -4
Simplifying
x = -4
12x12 + 12x12 = 288 = root of 288= 16.97
Answer:
it will take 25 hours
Step-by-step explanation: add 10 and 15
Answer:
x = 3
Step-by-step explanation:
13x - 2 = x + 2
12x = 4
x = 3
Answer: she is incorrect
Step-by-step explanation:
If Emily had a coupon for 20 percent off her purchase, this means that whatever she bought, the total amount would be reduced by 20%. She will be paying 80%
She finds a backpack she likes on the discount rack. It's original price is $60, but everything on the rack comes with a 30 percent discount.
This means that ordinarily,the amount she is meant to pay on the total goods she is buying is 30% lesser than $60. She will be paying
60 - (30/100 ×60)
60 - 0.3×60 = 60-18 = $42
Since she has a 20% coupon on total cost of goods bought, she would be paying
42 - (20/100 ×42)
42 - 0.2×42
= 42 - 8.4 = $33.6
Therefore,
If Emily says, "thirty percent and twenty percent make fifty percent so that her cost will be $30. She is incorrect. Her cost is $33.6
