10 + 8 + 0.6 + 0.04 = 18.64
Using the vertex of a quadratic function, it is found that Phoenix received the highest amount of precipitation on the month of May.
<h3>What is the vertex of a quadratic equation?</h3>
A quadratic equation is modeled by:

The vertex is given by:

In which:


Considering the coefficient a, we have that:
- If a < 0, the vertex is a maximum point.
- If a > 0, the vertex is a minimum point.
In this problem, the precipitation each month x in Phoenix is given by:

Hence the coefficients are a = -0.04088, b = 0.4485, c = 1.862, and the month for which the precipitation will be highest is given by:

Hence during the month of May.
More can be learned about the vertex of a quadratic function at brainly.com/question/24737967
Answer:
150
Step-by-step explanation:
angles in a triangle add up to 180 degrees
angles on a straight line add up to 180 degrees
Divide both sides by the number in front of x
so
4x=-16
x=-4
12=-3x
x=-4
-21=7x
x=-3
6x=-30
x=-5
Answer:
4.5
Step-by-step explanation:
3*3=9
9/2=4.5