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3 years ago

Please help me best answer will get brainliest,

Mathematics

2 answers:

FinnZ [79.3K]3 years ago

5 0

Answer:

Perimeter of the Rectangle is 2×(length+breadth)

→2{(3x+6)+(2x-4)}=2{3x+6+2x-4}=2{5x+2}=(10x+4)

<h3>(10x+4) inches is the right answer.</h3>

aksik [14]3 years ago

3 0

Answer: 10x-6

Step-by-step explanation:

2(3x+6)+2(2x-4)

=> 6x+12+4x-8

=> 10x-6

Have a nice day! :)

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The access code for a garage door consists of three digits. Each digit can be any number from 1 through 5, and each digit can b

Papessa [141]

Answer:

(a) 125

$(b) \dfrac{1}{125}$

$(c) \dfrac{124}{125}$

Step-by-step explanation:

We are given that access code consists of 3 digits.

Each digit can be any digit through 1 to 5 and can be repeated.

Now, this problem is equivalent to the problem that we have to find:

The number of 3 digit numbers that can be formed using the digits 1 to 5 with repetition allowed.

(a) We have 3 places here, unit's, ten's and hundred's places respectively and each of the 3 places have 5 possibilities (any digit allowed with repetition).

So, total number of access codes possible:

$5\times 5 \times 5 = 125$

(b) Suppose, an access code is randomly selected, what is the probability that it will be correct.

Formula for probability of an event E can be observed as:

$P(E) = \dfrac{\text{Number of favorable cases}}{\text {Total number of cases}}$

Here, only 1 code is correct, so

Number of favorable cases = 1

Total number of cases = 125

So, required probability:

$P(E) = \dfrac{1}{125}$

$P(\overline E) = 1-P(E)\\\Rightarrow P(\overline E) = 1-\dfrac{1}{125}\\\Rightarrow P(\overline E) = \dfrac{125-1}{125}\\\Rightarrow P(\overline E) = \dfrac{124}{125}$

So, the answers are:

(a) 125

$(b) \dfrac{1}{125}$

$(c) \dfrac{124}{125}$

7 0

3 years ago

Find the other x-intercept for the parabola defined by this equation y=2x2+3-2

ASHA 777 [7]

Answer:

( $\frac{1}{2}$ , 0 )

Step-by-step explanation:

To find the x- intercepts let y = 0, that is

2x² + 3x - 2 = 0

Consider the factors of the product of the coefficient of the x² term and the constant term which sum to give the coefficient of the x- term.

product = 2 × - 2 = - 4 and sum = + 3

The factors are + 4 and - 1

Use these factors to split the x- term

2x² + 4x - x - 2 = 0 ( factor the first/second and third/fourth terms )

2x(x + 2) - 1 (x + 2) ← factor out (x + 2) from each term

(x + 2)(2x - 1) = 0

Equate each factor to zero and solve for x

x + 2 = 0 ⇒ x = - 2

2x - 1 = 0 ⇒ 2x = 1 ⇒ x = $\frac{1}{2}$

The x- intercepts are (- 2, 0 ), ( $\frac{1}{2}$ , 0 )

8 0

3 years ago

Erica wants to know how many books on average are in school libraries in her county. She randomly calls 50 school libraries in h

Rus_ich [418]

valid. She used a representative sample
because she correctly found the average and 18,000 is a reasonable number to get for a the problem

5 0

3 years ago

Read 2 more answers

2x^3 + x^2 – 7x – 6 divided by 2x +3

nevsk [136]

Answer:

x^2 -x -2

Step-by-step explanation:

Use polynomial long division.

0 + x^2 -x -2

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(2x+3) | 2x^3 +x^2 -7x -6

-2x^3 -3x^2

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-2x^2 -7x

+2x^2 +3x

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-4x -6

+2x +6

_______

6 0

3 years ago

Factor the polynomial. 30xy+36x^2+30x+25y

zavuch27 [327]

30xy + 36x^2 + 30x + 25y

= 6x(5y + 6x) + 5(6x + 5y)

= (6x + 5)(6x + 5y) Answer

7 0

3 years ago