Mathematics, 12.11.2019 08:31, xaviuzc

# Zach and roger spent a total of 69 hours building a treehouse. roger worked 9 hours less than twice the number of hours zach worked. which system of equations can be used to determine the number of hours zach worked, x, and the number of hours roger worked, y?

a.

x + y = 69

2x + y = 9

b.

x - y = 69

y = 2x + 9

c.

x + y = 69

y = 9x - 2

d.

x + y = 69

y = 2x - 9

Answers: 3

Mathematics, 21.06.2019 15:40, asiaosterling

Solve 6^(x+2)=10 for x using the change of base formula logby=logy/logb

Answers: 3

Mathematics, 21.06.2019 16:40, idioticeinstein9021

How do i get my dad to stop making me gargle his pickle i want my mom to gargle my pickle not my dads

Answers: 3

Mathematics, 21.06.2019 19:10, dylancasebere

What is the quotient of m^6/5 รท 5/m^2? assume m does not equal plsโ

Answers: 1

Zach and roger spent a total of 69 hours building a treehouse. roger worked 9 hours less than twice...

History, 10.03.2020 12:14

Mathematics, 10.03.2020 12:17

Chemistry, 10.03.2020 12:18

History, 10.03.2020 13:21

Mathematics, 10.03.2020 13:21