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

Which sentences in these excerpts reflect the idea that war affects not only the minds of the combatants but also their physical reactions? Ambush by Tim O'Bri

PLEASE HELP PLEASEEEEEEE!!!! 1. Public policy has little impact on the everyday lives of American citizens True or False? 2. There are a number of different ve

A person's average body mass index (bmi) is the lowest between the ages of:

In pea plants, the allele for purple flowers (p) is dominant to the allele for white flowers (p). in a cross between a purple-flowered plant and a white-flowere

You should give up your right-of-way when ______.

Read the excerpt below and answer the question. "Her husband ought to could make her behave. Don't it seem that way to you?" asked Mrs. Fletcher. "He ought to

Read the poem by Emily Dickinson. THE LOST JEWEL I held a jewel in my fingers And went to sleep. The day was warm, and winds were prosy; I said: "'Twill keep."

What percent of americans have tried caffeine?

Who developed a written Cherokee syllabary

Express the decimal 0.907 as a percent?