Please bootiful people help this nonsmart person

9

Step-by-step explanation:

the triangle is right angle.

at right angle it makes 90°. therefore;

(3d+1)°+(6d+8)°=90°

3d+1°+6d+8°=90°

9d+9°=90°.

9d=90°-9°

9d=81°

d=81/9

d=9°

Demographics

With a population of more than 518,000, Mesa, Arizona is the 35th largest city in the United States and second largest in the Phoenix-Mesa metro area and is larger than Miami, Minneapolis, Atlanta and St. Louis.  Mesa encompasses 138 square miles (357 square kilometers) inside a 21-city region that has a population of 4.9 million people, and is projected to grow to 5.3 million by 2025.

Population

2019 Estimate*518,012

2025 Projection551,151

Growth 2010-202525.3%

Households

2020 Estimate191,162

2025 Projection204,173

Population by Age

14 and under20.5%

15 to 2412.7%

25 to 4427.3%

45 to 6422%

65+17.5%

Median Age36.3

Population by Race

White73%

Black or African American4.3%

American Indian2.6%

Asian2.6%

Pacific Islander0.4%

Other Race13%

Two or More Races4.1%

Population by Ethnicity

Non-Hispanic

70.2%

Hispanic

29.8%

Educational Attainment

(Highest Level Completed)

High School Graduate25.2%

Some College27%

Associates Degree or Higher36.7%

Household Income

Median$58,928

Average$80,539

Source: ESRI Community Analyst, 2020, and 2019 Census Estimate*

Step-by-step explanation:

that's your literal answer from that source