Answer:
General Formulas and Concepts:
<u>Pre-Algebra</u>
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
Equality Properties
- Multiplication Property of Equality
- Division Property of Equality
- Addition Property of Equality
- Subtraction Property of Equality
<u>Trigonometry</u>
- [Right Triangles Only] SOHCAHTOA
- [Right Triangles Only] cosθ = adjacent over hypotenuse
Step-by-step explanation:
<u>Step 1: Define</u>
Angle θ = 28°
Adjacent Leg = EF = <em>x</em>
Hypotenuse = DF = 18
<u>Step 2: Solve for </u><em><u>x</u></em>
- Substitute in variables [Cosine]:
- [Multiplication Property of Equality] Multiply 18 on both sides:
- Evaluate trig:
- Multiply:
- Rewrite:
- Round:
The vertex of the angle must stay the same so F must always be in the middle.
Therefore you have EFG
And GFE
Answer:
One solution
Step-by-step explanation:
y = 2x – 5. –8x – 4y = –20. one solution: (–2.5, 0)
Answer:
2x(5x +1)=3
Step-by-step explanation:
2x(5x + 1) = 3
3 is the answer because 2x-5x=3 and 3*1=3
Answer: 109 km/h
Step-by-step explanation:
Hi to answer this question we have to divide the distance traveled by the truck loaded with fruit (689-144) by the time that it took. (5)
Kilometers within the same time
Mathematically speaking:
(689-144)kilometers /5 hours = 109 km/h
Feel free to ask for more if needed or if you did not understand something.