Answer:
x=-2.8
Step-by-step explanation:

This is a parabola, meaning the equation is a quadratic, so it has 2 roots or x-intercepts, keeping in mind that vertex will lie half-way between those intercepts.
so what's the x-value halfway between -3 and 7? yeap, you guessed it, 2.
so the axis of symmetry for this vertical parabola will be at x = 2.
Answer: B
explanation:
anything equal to or above 212 is boiling
good luck!
Answer:
-34
Step-by-step explanation:
Since all the answer have the letter r in it, r would be the unknown number.
In math the "/" line represents division.
So 50 divided by an unknown number would become 50/r/
The answer is D.