Answer:
see below
Step-by-step explanation:
A left-arrow on a number line represents subtraction of a positive number or addition of a negative number. The two left arrows, one of length 0.2, the other of length 0.1, indicate the numbers -0.2 and -0.1 are being added. The end result is the dot at the end of the combined arrows, at -0.3.
The only expression that is true and corresponds to this description is the one shown below.
Hello!
<span>Simplifying:
5x^2 + -90 = 0
</span><span>Reorder the terms:
-90 + 5x^2 = 0
</span><span>Solving:
-90 + 5x^2 = 0
</span><span>Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
</span><span>Add '90' to each side of the equation.
</span><span>-90 + 90 + 5x^2 = 0 + 90
</span><span>Combine like terms: -90 + 90 = 0
</span><span>0 + 5x^2 = 0 + 90
</span><span>5x^2 = 0 + 90
</span>Combine like terms: 0 + 90 = 90
<span>5x^2 = 90
</span><span>Divide each side by '5'.
</span><span>x^2 = 18
</span><span>Simplifying:
</span><span>x^2 = 18
</span><span>Take the square root of each side:
</span>x = {-4.242640687, 4.242640687}
Hope this Helps! Have A WONDERFUL Day! :)