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3 years ago

All functions have a domain and a range. True False

Mathematics

1 answer:

Elza [17]3 years ago

6 0

Answer:

True

Step-by-step explanation:

The definition of the function is a relation with exactly one x for each y. x is the domain, and y is the range, so all functions have a domain and a range.

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Solve (x - 3)^2 = 5 p please help

wel

Hello!

Let's solve !

⇒ (x - 3)² = 5

⇒ x² - 6x + 9 = 5

⇒ x² - 6x + 4 = 0

⇒ x = -(-6) ± √36 - 4(1)(4) / 2

⇒ x = 6 ± √20 / 2 = 6 ± 2√5 / 2

⇒ x = 3 ± √5

∴ The solutions are x = 3 + √5 and x = 3 - √5.

3 0

2 years ago

Read 2 more answers

Hi im maddie im only in 5th grade tgo but it says to express nine thousandsths as a decimal

monitta

Answer:

0.009

Step-by-step explanation:

Simply move the decimal point from nine- then move it to the right three times.

If you need any more help, do not hesitate to ask me. :)

8 0

3 years ago

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A group of friends count the coins they have in their pockets.

Len [333]

Answer:

The median stays the same, whilst the mean drops.

Step-by-step explanation:

4 0

3 years ago

What are the ratios for sin A and cos A? The triangle is not drawn to scale.

dalvyx [7]

Answer:

$SinA = \frac{84}{85}$ and $CosA=\frac{13}{85}$

Step-by-step explanation:

The ratios of sine and cos are defined as follows:

$Sin A = \frac{Opposite}{Hypotenuse}$ , and

$CosA = \frac{Adjacent}{Hypotenuse}$

The hypotenuse is always the side opposite of the 90 degree angle (for the given triangle, the hypotenuse is 85)

Since we are looking at the angle A, the opposite side with respect to A would be the side length of 84. That leaves the side 13 as the adjacent side.

Thus, we can now write:

$Sin A = \frac{Opposite}{Hypotenuse}\\SinA = \frac{84}{85}$