Answer:
none of the above
Step-by-step explanation:
Step-by-step explanation:
sum of four angles=360°
a=128
b=126
c=54
d=?,let d=x
128+126+54+x=360°
308+x=360
find like terms
x=360-308
x=52°
Answer:
4/5
Step-by-step explanation:
you cancel out the 7 to get 4/5
Answer:
144°
General Formulas and Concepts:
<u>Pre-Algebra</u>
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
<u>Geometry</u>
- Sum of Angles: 180(n - 2)
Step-by-step explanation:
<u>Step 1: Define</u>
Number of sides <em>n</em> = 10
<u>Step 2: Find</u>
- Substitute: 180(10 - 2)
- Subtract: 180(8)
- Multiply: 1440°
<u>Step 3: Find 1 angle</u>
<em>We have 10 sides.</em>
- Divide: 1440/10 = 144
9/20
A percentage is the same as showing a number over 100 and if we multiply 20 by 5 we get 100. So if we multiply 9 by 5 we get 45, giving us 45/100 which can be shown as 45%.
As a decimal, well if we say 100% equals 1.0, then 45% equals 0.45
