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 ( 56+ )
Otras preguntas
Which of these are NOT units for speed? i. miles/hour ii. meters/second iii. minutes/kilometer iv. inches/year
Choose the best explanation for the following statement. "Communication is symbolic." Communication uses gestures, signs, and body language. Communication is on
Match the pronoun with the sentence it belongs to. Match Term Definition Tú A) ________ necesito el libro y una regla en la clase de matemáticas. Él B) ______
A microwave oven emits radiation at a wavelength of 0.500 cm. What is the frequency of this radiation?
Question 10. An objective person is quick to be judgmental. A. True B. False
HEELLLPPPPPPPPPPPPPPPPPPPPPPPPPPP
Students in a class were asked how many hours a week they studied. Their answers are given below: 0, 5, 1, 2, 4, 0, 1, 3, 2, 2, 0, 1, 5, 3, 4, 4, 2, 1, 6 What i
Use the following checklist to help you evaluate your partner’s writing. Remember to offer 2 constructive suggestions and point out 2 parts you especially like.
points 50 Hellllppppp me Solve for x in the equation –2x + 4.4 = 23.8. A. 19.4 B. 11.9 C. –9.7 D. –14.1
Which of these are endocrine glands? Choose 2 correct answers. Pharynx Pituitary Alveoli Thyroid
