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 ( 83+ )
Otras preguntas
Element m has an ellectronegativity of less than 1.2 and reacts with bromine to form the compound MBr2. Element M could be?
How do you do this math problem
What evidence is there to suggest that tectonic plates move?
Please help me out on this question
read the following statements. if the statement applies to the north write North in the space if it applies to the South myself into space if it applies to both
When magma undergoes crystallization above ground, what type of rock results?
What does this mean
The revolution was almost two years old, and already there was talk of an impending crisis. What is the meaning of impending as it is used in the sentence? A.
How many amps of current are there in a system with 12 volts and 6 ohms? A. 0.5 amps B. 2 amps C. 18 amps D. 72 amps
According to this astronomer's depiction of Venus' orbit, Venus is an average of ______ million miles from the Sun. (Enter only the number.)
