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2 years ago

19.explain The difference between (-12)^2 and -12^2

Mathematics

1 answer:

Westkost [7]2 years ago

3 0

Answer:

See below

Step-by-step explanation:

(-12)²=144 while -(12²)=-144

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Which point is located on the graph of the equation y = 2x - 5

Butoxors [25]

Answer: The point are (2, -5)

Step-by-step explanation:

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3 years ago

A special type of door lock has a panel with five buttons labeled with the digits 1 through 5. This lock is opened by a sequence

belka [17]

There are several ways the door can be locked, these ways illustrate combination.

There are 3375 possible combinations

From the question, we have:

$\mathbf{n = 5}$ --- the number of digits

$\mathbf{r = 3}$ ---- the number of actions

Each of the three actions can either be:

Pressing one button
Pressing a pair of buttons

The number of ways of pressing a button is:

$\mathbf{n_1 = ^5C_1}$

Apply combination formula

$\mathbf{n_1 = \frac{5!}{(5-1)!1!}}$

$\mathbf{n_1 = \frac{5!}{4!1!}}$

$\mathbf{n_1 = \frac{5 \times 4!}{4! \times 1}}$

$\mathbf{n_1 = 5}$

The number of ways of pressing a pair is:

$\mathbf{n_2 = ^5C_2}$

Apply combination formula

$\mathbf{n_2 = \frac{5!}{(5-2)!2!}}$

$\mathbf{n_2 = \frac{5!}{3!2!}}$

$\mathbf{n_2 = \frac{5 \times 4 \times 3!}{3! \times 2 \times 1}}$

$\mathbf{n_2 = 10}$

So, the number of ways of performing one action is:

$\mathbf{n =n_1 + n_2}$

$\mathbf{n =5 + 10}$

$\mathbf{n =15}$

For the three actions, the number of ways is:

$\mathbf{Action = n^3}$

$\mathbf{Action = 15^3}$

$\mathbf{Action = 3375}$

Hence, there are 3375 possible combinations

Read more about permutation and combination at:

brainly.com/question/4546043

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2 years ago

What is the factorization of the trinomial below?

valkas [14]

B is the correct answer. hope this helped:)

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2 years ago

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If the entire school had 720 students can use this data to estimate how many of them would say that it takes them more than 10 m

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Answer:

I don't know but this question feels incomplete

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3 years ago

(2y+1.6)/0.8=30/2.5 Please Help! Solve for Y

galina1969 [7]

y = 4

first note that the right side simplifies to 12, equation can be written

$\frac{2y+1.6}{0.8}$ = 12 ( multiply both sides by 0.8 )

2y + 1.6 = 9.6 ( subtract 1.6 from both sides )

2y = 8 ( divide both sides by 2 )

y = 4

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3 years ago

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