The sum of a number and 19 is at least 8.2. What is the number?

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Answer 1 · 2016-01-24T08:19:25

$- 10.8$ $-10.8$

Let the number be x

Then $x + 19 = 8.2$ $x+19=8.2$

$\to x = 8.2 - 19$ $rarrx=8.2-19$

$x = - 10.8$ $x=-10.8$

Answer 2 · 2017-02-02T16:05:53

The term "at least" means that the number can be a range of values.

Define

Let $x$ $x$ be the number.

Write the equation

$x + 19 \geq 8.2$ $x+19 >= 8.2$

Subtract 19 from both sides of the inequality

$x \geq 8.2 - 19$ $x >= 8.2-19$

Simplify

$x \geq - 10.8$ $x >= -10.8$

So $x$ $x$ can be any number greater or equal to $- 10.8$ $-10.8$