P0tential
P0tential
03-05-2018
Mathematics
contestada
After how many hours does he break even?
Respuesta :
mkryukova19
mkryukova19
03-05-2018
25+30x=5x²-10
5x²-30x-35=0
x²-6x-7=0 -7=-7*1, -6=-7+1
(x-7)(x+1)=0
x-7=0,
x=7 hours.
x+1=0, x=-1 (we cannot take negative for hours)
So, answer is 7
Check
y=25+30*7=235
y=5x²-10= 5*7²-10=245-10 =235
Answer Link
VER TODAS LAS RESPUESTAS ( 77+ )
Otras preguntas
factoring-16w²+50wz-21z² please help me solve
Which statement accurately describes the Battle of Marathon? A. Athens fought alone against Darius's army and decisively defeated the Pers
what are facts on Loyalists?
Solve for x/4-x+2/6=x/3
What effects did the battle of bunker hill have?
The width of a computer monitor is 30 cm. If the perimeter is 144 cm, what is the area of the computer monitor?
if the proper dosage of a drug is 2.0mg/kg of body weight, how many milligrams (mg) of the drug would a 110 lb individual need? (5%)
Is There Still Slavery in the World? Please help me :)
what is the fraction ten twelfths in it's simplest form ?
Subtract: 6lb 4oz - 2lb 10oz
