So you need to do substitution. First solve the easier equation for 1 variable.
x+y=-1 now subtract x to get y=-x-1. Then plug this into the top equation to get 2x+7(-x-1)=2. Next distribute to get 2x+-7x-7=2. Now combine like terms to get -5x=9 so x=-5/9. Now you have to plug this back into the original equation to get y. 2(-5/9)+7y=2, so -10/9 +7y=2. No move terms around to get 7y=28/9 then divide by 7 to get y= 4/9
It would take you 26.1 minutes to clean all the showers. If it takes 5.22 minutes to clean the one and you have five to clean just multiply the time by five. Good luck!
General formula :
V = pi x radius squared x height
41.5 = pi x 4 x h
41.5 = 4pi x h
41.5/4pi = h
3.302465069 = h
Elena walked 15 miles because 1/4 of 12 is 3 and 12+3= 15
Answer:
C) y = 7 x minus 3
Step-by-step explanation:
Function A has a slope of -8
Function B has a slope of -2
Function C has a slope of 7
Function D has a slope of 6
The function with the steepest slope is function C.
