For this item, I assume that Svetlana's hair is 4 cm long and she wanted it to be at least 7 cm long.
We let x be the number of months it will take for her hair to be 7 cm long. The sum of the product of x and the rate and the initial length should be at least 7. Mathematically,
1.51x + 4 ≤ 7
Answer:
<em>Approximation = 3 < x < 4 or -4 < x < -3</em>
<em>Exact Solution = 3.162 or -3.162</em>
Step-by-step explanation:
5x^2 - 24 = 26
<em>First add 24 to both sides....</em>
5x^2 = 50
Divide by 5...
x^2 = 10
Square root of 10 is exactly 3.162 or -3.162
Since 10 is not a perfect square, we can approximate it's square root by analyzing the perfect squares it is in between.
These perfect squares are 9 and 16
It looks like this:
We know that the square roots of these numbers are 3 and 4 so that leaves us with this...
Since we are dealing with square roots and perfect squares, we can also consider this as an option...
Yes, (2,0) is a solution to y<2x+4
Thank you so much dude!! i needed it!!