The price of veronica‘s meal before tax and tip was 1192 veronica pay a percent tax then added a 15% tip to the total to the nearest cent how much did veronica pay for her meal

If x + 10 = 70, what is x? a. 40 b. 50 c. 60 d. 70 e. 80

Ineed someone to me answer my question i have to have this done and knocked out

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.