Answer:
D. 20
General Formulas and Concepts:
<u>Pre-Algebra</u>
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
Equality Properties
<u>Geometry</u>
- All angles in a triangle add up to 180°
Step-by-step explanation:
<u>Step 1: Set Up Equation</u>
3x + 3x + 10 + 2x + 10 = 180
<u>Step 2: Solve for </u><em><u>x</u></em>
- Combine like terms: 8x + 20 = 180
- Isolate <em>x</em> term: 8x = 160
- Isolate <em>x</em>: x = 20
Let the two integers be x and y respectively
Hence;
From the first equation ;
Substitute into the third equation
Open up the bracket
Take everything to the right hand side of the equation and you'll have a quadratic equation
Solve the quadratic equation and you'll have two roots
Substitute for each value of y in the first equation
Therefore:
Therefore the answer is A
There are 288 ounces in 18 lbs
Answer:
the third 1
Step-by-step explanation:
Answer:
22.14
Step-by-step explanation:
Using the Pythagorean Theorem:
a^2 + b^2 = c^2
21^2 + 7^2 = c^2
441 + 49 = c^2
490 = c^2 (square root both sides so c^2 becomes c)
c = 22.13594363 (round to hundredths)
c = 22.14