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Akimi4 [234]
3 years ago
14

Select all of the following that are quadratic equations. 7x2 + 14x = 0 x3 - 3x2 + 1 = 0 5x - 7 = 0 x2 + 3x -5 = 0 x - 5 = 9x +

7 x2 - x = 3x + 7
Mathematics
1 answer:
Tpy6a [65]3 years ago
4 0

Answer:

7x2 + 14x = 0

x2 + 3x -5 = 0

x2 - x = 3x + 7  

Step-by-step explanation:

A quadratic equation has the highest power of x to the second power.  It must have x to the second power

7x2 + 14x = 0  quadratic

x3 - 3x2 + 1 = 0   not quadratic  but cubic

5x - 7 = 0  not quadratic  but linear

x2 + 3x -5 = 0   quadratic

x - 5 = 9x + 7  not quadratic but linear

x2 - x = 3x + 7  quadratic

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Answer:

$43.95

Step-by-step explanation:

A <em>percent</em> means ¹/₁₀₀ of something.

So, 15 % means ¹⁵/₁₀₀ of something.

15 % of $293.00 means ¹⁵/₁₀₀ × $293.00

Commission = ¹⁵/₁₀₀ × 293.00

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4 years ago
(f-g)(x) <br> f(x)= 1/x+2 <br> g(x)= 3x
prohojiy [21]

Answer:

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Step-by-step explanation:

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can be summarized on line line as:

f(x) - g(x) = (1/x) + 2 - 3x      or (f - g)(x)

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3 years ago
How is the area of a rectangle related to the operation of multiplication
Trava [24]

Answer:

READ VERY CAREFULLY

Step-by-step explanation:

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snow_tiger [21]

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3 years ago
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