Daca 24 de muncitori termina o lucrare in 4 zile, de cati muncitori este nevoie pentru a termina lucrarea in 3 zile?
2 answers:
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Answer:
10/18
Step-by-step explanation:
To convert 1.8 to a reciprocal, you first need to change it into a fraction.
1.8 basically expresses 1 which equals
.
Since a reciprocal is just switching the top and bottom of a fraction, your reciprocal of 1.8 will be .
You can simplify this if you want, to get . Either one is correct.
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Answer:
see explanation
Step-by-step explanation:
Given
2x² + x - 1 = 2 ( subtract 2 from both sides )
2x² + x - 3 = 0
Consider the factors of the product of the coefficient of the x² term and the constant term which sum to give the coefficient of the x- term
product = 2 × - 3 = - 6 and sum = + 1
The factors are - 2 and + 3
Use these factors to split the x- term
2x² - 2x + 3x - 3 = 0 ( factor the first/second and third/fourth terms )
2x(x - 1) + 3(x - 1) = 0 ← factor out (x - 1) from each term
(x - 1)(2x + 3) = 0
Equate each factor to zero and solve for x
x - 1 = 0 ⇒ x = 1
2x + 3 = 0 ⇒ 2x = - 3 ⇒ x = -