 , 25.12.2019 19:28 elaineeee

# give an equation for each sentence. use n to represent the unknown number.1.six increased by a number os twenty2.a number decreased by seven is four3.two more than a number is twelve4.one less than a number is eighteen 5.twice a number is a hundred6.twice a number os one-half7.rhe square of a number increased by four is twice by four is twice the number8.the cube of a number decreased by seven is four times the number9.the sum of twice a number and two is thirteen10.the product of a number and its half is eighteen   ### Another question on Math Math, 28.10.2019 16:29
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Scientific notation 1. physicist measuring the quantity of electric charge in coulombs (c) found that one coulomb is equal to 6.24x10^18 electrons. about how many electrons are there in 10^3 coulombs? 2. r.millikan, a physicist, found out in his oil drop experiment that 1 electron unit (eu) is equal to 1.602x10^-19. how many coulombs are there in 10^5 eu? 3. one mole of water has a mass of 18g and contains about 6.02x10^23 molecules of water. what is the molecule content of 10^2 moles of water? what is it's mass? 4. a light year, the distance light travels in one year is about 9.44,10^12 km. if polaris is about 64 000 000 000km from earth, about how long will it take light from this star to reach earth? (include solutions please) Math, 28.10.2019 19:28
The sum of twice the length of fence and 250 feet must be less than 2000 feet
give an equation for each sentence. use n to represent the unknown number.
1.six increased by a...
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