Did I get this right? And please explain why or why not please

Mathematics

1 answer:

schepotkina [342]2 years ago

3 0

$\bf 7x^2-10\implies 7(\stackrel{x}{6})^2-10\implies 7(36)-10\implies 252-10\implies 242
\\\\\\
43\ \textless \ y-30\implies 43+30\ \textless \ y\implies 73\ \textless \ y\qquad y=
\begin{cases}
74\\
75\\
76\\
77\\
...+\infty
\end{cases}$

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Find the difference. (3x3−2x2+4x−8)−(5x3+12x2−3x−4)=

Lunna [17]

Answer:

-2x³ - 14x² + 7x - 4

General Formulas and Concepts:

Pre-Algebra

Distributive Property

Algebra I

Terms/Coefficients

Step-by-step explanation:

Step 1: Define

Identify

(3x³ - 2x² + 4x - 8) - (5x³ + 12x² - 3x - 4)

Step 2: Simplify

[Distributive Property] Distribute negative: 3x³ - 2x² + 4x - 8 - 5x³ - 12x² + 3x + 4
Combine like terms (x³): -2x³ - 2x² + 4x - 8 - 12x² + 3x + 4
Combine like terms (x²): -2x³ - 14x² + 4x - 8 + 3x + 4
Combine like terms (x): -2x³ - 14x² + 7x - 8 + 4
Combine like terms: -2x³ - 14x² + 7x - 4

7 0

3 years ago

the surface area of a sphere is 1,017.36 square inches.what is the volume of the sphere? use 3.14 for pi

emmasim [6.3K]

Answer:

Area = 254.34 inches ³

Step-by-step explanation:

The formula to find the surface area of a sphere is:

$SA = 4\pi r^{2}$

To find the volume of the sphere, we first need to figure out the radius ( $r$ ) of the sphere. We can accomplish this by reversing the formula that was used to find the surface area. $(1017.36 in^{2})$