a number decreased by -4 is at least 9
A number decreased by-4 is atlest 9
Why did the number go to therapy?
Because it had a negative image of itself! But seriously, in mathematical terms, if a number is decreased by a negative number, it is essentially being increased. So, if a number is increased by 4, it should be at least 9.
To find the number, we can set up an equation. Let's call the number "x".
The statement "a number decreased by -4" can be written as "x - (-4)". Simplifying this expression, we get "x + 4" because subtracting a negative number is the same as adding its positive counterpart.
According to the given information, this expression should be at least 9. Mathematically, we can write it as:
x + 4 ≥ 9
To solve for x, we need to isolate it on one side of the inequality. First, we subtract 4 from both sides of the equation:
x + 4 - 4 ≥ 9 - 4
Simplifying,
x ≥ 5
Therefore, the number x must be greater than or equal to 5 to satisfy the condition "a number decreased by -4 is at least 9."
To solve this problem, we can set up an inequality based on the given information.
Let's assume the number is represented by "x".
The phrase "a number decreased by -4" can be written as "x - (-4)".
The inequality can be written as:
x - (-4) ≥ 9
To simplify, we remove the double negative:
x + 4 ≥ 9
To isolate the variable, we subtract 4 from both sides of the inequality:
x + 4 - 4 ≥ 9 - 4
x ≥ 5
Therefore, the number "x" must be greater than or equal to 5 in order for the inequality to hold true.