Answer:
4
General Formulas and Concepts:
<u>Pre-Algebra</u>
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
Distributive Property
Equality Properties
- Multiplication Property of Equality
- Division Property of Equality
- Addition Property of Equality
- Subtraction Property of Equality
<u>Algebra I</u>
- Terms/Coefficients
- Solving systems of equations using substitution/elimination
Step-by-step explanation:
<u>Step 1: Define Systems</u>
2x - y = 11
x + 3y = -5
<u>Step 2: Rewrite Systems</u>
2x - y = 11
- [Subtraction Property of Equality] Subtract 2x on both sides: -y = 11 - 2x
- [Division Property of Equality] Divide -1 on both sides: y = 2x - 11
<u>Step 3: Redefine Systems</u>
y = 2x - 11
x + 3y = -5
<u>Step 2: Solve for </u><em><u>x</u></em>
<em>Substitution</em>
- Substitute in <em>y</em> [2nd Equation]: x + 3(2x - 11) = -5
- [Distributive Property] Distribute 3: x + 6x - 33 = -5
- Combine like terms: 7x - 33 = -5
- [Addition Property of Equality] Add 33 on both sides: 7x = 28
- [Division Property of Equality] Divide 7 on both sides: x = 4
Answer:
L= 126 degrees, U= 66 degrees, N= 48 degrees, A= 54 degrees
Step-by-step explanation:
The magic number is 180, that is when all angles form a strait line. So, in order to solve for each angle, you have to add and subtract a little. Some of the angles are the same degree as others because they are equivalent to their opposite angle. Hope that helps :)
P.S. I took geometry over two years ago so I know my stuff lol, I'm 100% sure. Cheers!
Answer:
11
Step-by-step explanation:
AB and BC are equal. I mid point divides a segment into 2 equal pieces.
5x - 9 = 3x - 1 Subtract 3x from both sides
5x - 3x - 9 = 3x - 3x - 1 Combine
2x - 9 = - 1 Add 9 to both sides
2x - 9 + 9 = - 1 + 9 Combine
2x = 8 Divide by 2
2x/2 = 8/2
x = 4
AB length
5x - 9 = 5*4 - 9 = 20 - 9 = 11
AB = 11
Answer:
z=6+2i maybe
Step-by-step explanation:
Answer:
3
Step-by-step explanation:
