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 ( 62+ )
Otras preguntas
what is 1/x∧-3/6 and how do you get to that answer?
What symptoms do you think a peptic ulcer would cause? Why do you think these symptoms would occur?
8/m-9=6/m-8What does m equal?Please show clear steps!
Which of the following could have the electron configuration 2.8? I. Sodium (Na) atom II. Lithium (Li) ion III. Oxygen (O) ion IV. Neon (Ne) atom V. Sulfur
NEED HELP NOW! Explain why the two figures below are similar. Use complete sentences and provide evidence to support your explanation. WILL GIVE BRAINLIEST!
Question10................
Read the text that Marcia sent to a friend. I had to come up with a service project as part of my grade in social studies, so I did a food drive in the spring.
Solve the proportion. x-8/5 = 2/4 A) 5/2 B) 9/2 C) 21/2 D) 18
why are the sunrise and sunset red?
Solve the double inequality: −3>7x−8>−0.2
