Basic trig concepts you have to keep in mind:
SOH CAH TOA
Sine: Opposite of the angle over the hypotenuse
Cosine: Adjacent over hypotenuse
Tangent: Opposite over adjacent
I'll do one of the problems, you should be able to do the rest (It's good practice ;))
Answer:
a) 7
b) 2 2/7
Step-by-step explanation:
A) 2/7=2/x
x=7
B) 2/7=x/8
cross multiply
16=7x
x=16/7, or 2 2/7, or 2.2857
Answer:
undefined
Step-by-step explanation:
i think its undefined
Answer:
(-3, -15)
General Formulas and Concepts:
<u>Pre-Algebra</u>
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
Equality Properties
<u>Algebra I</u>
- Solving systems of equations using substitution/elimination
Step-by-step explanation:
<u>Step 1: Define Systems</u>
n = 5m
n = 2/3m - 13
<u>Step 2: Solve for </u><em><u>m</u></em>
<em>Substitution</em>
- Substitute in <em>n</em>: 5m = 2/3m - 13
- Subtract 2/3m on both sides: 13/3m = -13
- Divide 11/3 on both sides: m = -3
<u>Step 3: Solve for </u><em><u>n</u></em>
- Define equation: n = 5m
- Substitute in <em>m</em>: n = 5(-3)
- Multiply: n = -15
The answer is A, (2x+3)(x-7)