Given:
420 tropical fishes
angel fish = x
parrot fish = 6x
x + y = 420
y = 6x Choice D.
x + y = 420
y = 6x
x + 6x = 420
7x = 420
x = 420 / 7
x = 60 number of angelfish
y = 6x
y = 6(60)
y = 360 number of parrot fish
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Answer:
<u><em>42 sq ft.</em></u>
Step-by-step explanation:
![A=w *l](https://tex.z-dn.net/?f=A%3Dw%20%2Al)
![A=14 *3=42](https://tex.z-dn.net/?f=A%3D14%20%2A3%3D42)
=42 sq ft
(note: i dont think it matters how you put the numbers, they still mulitply up to 42)
Hope this helped
~<u>rere</u>
Answer: 2.4
Step-by-step explanation:
Answer:
(3, -1)
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>
3x - y = 10
2x - y = 7
<u>Step 2: Rewrite Systems</u>
3x - y = 10
- Subtract 3x on both sides: -y = 10 - 3x
- Divide -1 on both sides: y = 3x - 10
<u>Step 3: Redefine Systems</u>
y = 3x - 10
2x - y = 7
<u>Step 4: Solve for </u><em><u>x</u></em>
<em>Substitution</em>
- Substitute in <em>y</em>: 2x - (3x - 10) = 7
- Distribute -1: 2x - 3x + 10 = 7
- Combine like terms: -x + 10 = 7
- Isolate <em>x</em> term: -x = -3
- Isolate <em>x</em>: x = 3
<u>Step 5: Solve for </u><em><u>y</u></em>
- Define equation: 3x - y = 10
- Substitute in <em>x</em>: 3(3) - y = 10
- Multiply: 9 - y = 10
- Isolate <em>y</em> term: -y = 1
- Isolate <em>y</em>: y = -1