liamhallowell28 liamhallowell28

03-02-2019
Mathematics

contestada

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

Respuesta :

mathecoach mathecoach

03-02-2019

Answer:

√(7·x + 14) + √(7 - x)

7·x + 14 ≥ 0 --> x ≥ -2

7 - x ≥ 0 --> x ≤ 7

x ∈ [-2 ; 7]

Answer Link

Otras preguntas

how is mass transit in cities a possible solution tk urban air pollution?

Scarcity is the condition of not having enough goods and services to satisfy everyone's?

Prove that (x^5)-(x^2)+2x +3=0 has at least one real root. Prove that x=cosx has at least one solution.

what is the answer for (20,8),(9,16) ?

find an equivalent expression without parentheses -(50x-15y+15)=

find an equivalent expression without parentheses -(50x-15y+15)=

Marika and Freddy sold 70 homes for Ron Realty. If Marika sold 2.5 times as many homes as Freddy, how many homes did each sell?

Can someone use the word delta in a sentence

Scarcity is the condition of not having enough goods and services to satisfy everyone's?

Data are drawn from a symmetric and bell shaped distribution with a mean of 120 and a standard deviation of 5. There are 900 observations in the data set. What