A battery was charged. When the changing began, it was 23 percent full. After 30 minutes of charging, the battery was 89 percent
full? How long did it take to fully charge in minutes?
1 answer:
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Step-by-step explanation:
f(x) = x² - 4
y = x²-4
x = y²-4
x + 4 = y²
Answer:
The value of x that makes the equation true is 3
Explanation:
From the attached image;
Let us write the mathematical equation of the model.
The long bar means x, while the small squares have a value of 1 each.
solving the equation we have;
Therefore, the value of x that makes the equation true is 3