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 ( 17+ )
Otras preguntas
Danny charges $30 for 3 hours of swimming lessons, Martin charges $65 for 5 hours of swimming lessons. Who offers a better deal?
PLEASE HELP ITS TIMED Your teacher describes a population of fish that live in a coral reef. Some fish are dark orange (the same color as the coral); other fish
Which part of the respiratory system interacts with the blood to exchange gases?.
Why does society take care of its animals?
Which problem solving strategy would be best to solve this problem?Your friend's house is 12 miles from your home. Your school is one-third the way from your fr
How have you improved the technology function to provide the right services at the right price and right level of quality?
what’s an analogy for infraction please help will mark brainly
Suppose that John wants to calculate a 96% confidence interval for a population mean from a sample of size n = 15. What is the appropriate critical value t*? a.
2. What types of geographic features can you identify in Greece?
Could the following side lengths make a right triangle? 28, 53, 45
