1. Carlos has 4/5 of a tank of gas in his car. He uses 1/10 of a tank per day. How many days will the gas last him before he needs to refill his tank.

2. Sarah has 2/3 gallon of blue paint and 7/12 gallon of red paint. If she has a total of 2 1/8 gallons of paint, how many gallons are neither red nor blue paint.

How does number one go by total divided by part but number 2 doesn't.

the volume is the product of the area of the base, 3x(3x+4), and the height, 3x-1

step-by-step explanation:

no because mercury has a density of 13.6 grams per centimeter squared while gold has 19.32 grams centimeter squared

step-by-step explanation:

answer: cos [   arcsin (3/5) - arccos (1/2) ] =

step-by-step explanation: × = 3/5 = 0.6--> x = 36.87 and x = 180 - 36.87 = 143.13 deg

cos y = 1/2 --> y = +- 60 deg a. cos (x - y) = cos (143.13 - 60) = cos 83,13  

=

0.12

b. cos (36.87 - 60) = cos (-23.23) = 0.92