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2 years ago

100 POINTS PLEASE HELP ASAP!!!! BTW I'm adding an attachment so dont answer until u see the question :)

Mathematics

1 answer:

nordsb [41]2 years ago

4 0

$\bf \cfrac{2}{5}\cdot \cfrac{3}{8}\implies \cfrac{\stackrel{1}{~~\begin{matrix} 2 \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}~~}}{5}\cdot \cfrac{3}{\underset{4}{~~\begin{matrix} 8 \\[-0.7em]\cline{1-1}\\[-5pt]\end{matrix}~~}}\implies \cfrac{3}{20}$

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Nine more than seven times a number, n, gives the same value as one more than the square of the number. Write an equation and so

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Answer:

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General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Equality Properties

Algebra I

Factoring
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Step-by-step explanation:

Step 1: Set up Equation

"Nine more" is + 9

"Seven times a number" is 7n

"One more" is + 1

"Square of the [same] number" is n²

7n + 9 = n² + 1

Step 2: Solve for n

Subtract 7n on both sides: 9 = n² - 7n + 1
Subtract 9 on both sides: 0 = n² - 7n - 8
Factor quadratic: 0 = (n - 8)(n + 1)
Solve roots: n = -1, 8

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Step-by-step explanation:

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