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

Select the correct sentence: Je fais du patin à glace en hiver. Elle fait au ping-pong. Je fais de le judo. Il fait le basket.

Each of the castles had _____ own army of knights. Which pronoun agrees with the antecedent in the sentence? her its their his

You went to the moon, how would your mass change relative to your mass on Earth? It would be the same on the moon as on Earth It would increase because of less

Which of the following would be a good reason for a species to undergo cyclic population changes? A.) The keystone species in its ecosystem is removed. B.) the

Which modifier can be used to make a comparison? total infinite large equal

whats 9/12 equelivant to

A person who brings things into the country illegally

What's the difference between 1 fifth of 10 and 5 times 10

One is most likely to feel repugnance for that which he or she finds a. puzzling. c. desirable. b. disgusting.

Which piece of federal legislation during World War II authorized the United States to provide war supplies to other countries?