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3 years ago

What is (x+3)(x-3) in standard form ?

Mathematics

1 answer:

Scilla [17]3 years ago

6 0

Answer:

x² - 9

Step-by-step explanation:

(x + 3)(x - 3)

= x(x - 3) + 3(x - 3) Distributive property

= x² - 3x + 3x - 9

= x² +( -3x + 3x) - 9 Associative

= x² + 0x - 9 Addition

= x² - 9

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Connie made 60 throws and Sarah made 72.

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4 years ago

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I don’t understand any of this

AysviL [449]

Answer:

Step-by-step explanation:

From the given triangles in the picture attached,

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ΔABC ~ ΔXZY

Similarity statement:

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3 years ago

Help solve this problem please?

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Step-by-step explanation:

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2 years ago

Which function has an inverse function?

daser333 [38]

Answer: Option B

Step-by-step explanation:

By definition, only those functions that are one to one have an inverse function.

A function is one by one if there are not two different input values, $x_1$ and $x_2$ , that have the same output value y

Note that the function $f(x)= \frac{|x+3|}{5}$ is not a one-to-one function

When x=2 $f(x)= \frac{|2+3|}{5}=1\ ,\ \ y=1$

When x=8 $f(x)= \frac{|-8+3|}{5}=1\ \ ,\ y=1$

Note that the function $f(x)= \frac{x^4}{7}+ 27$ is not a one-to-one function

When x=1 $f(x)= \frac{(1)^4}{7}+27\ ,\ \ y=\frac{190}{7}$

When x=-1 $f(x)= \frac{(-1)^4}{7}+27\ ,\ \ y=\frac{190}{7}$

Note that the function $f(x)= \frac{1}{x^2}$ is not a one-to-one function

When x=1 $f(x)= \frac{1}{(1)^2}\ ,\ \ y=1$

When x=-1 $f(x)= \frac{1}{(-1)^2}\ ,\ \ y=1$

Then the answer is the option B.

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3 years ago

Ashley can ride her bicycle 15 miles in 2 hours. There are 60 minutes in 1 hour, and there are 1,760 yards in 1 mile. How many y

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Answer:

About 30 if you want it really specific 29.3

Take 1,760 and divide by 60 which is 29.3

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