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4 years ago

Plz help, will give brainllest to the one correct

Mathematics

1 answer:

galina1969 [7]4 years ago

8 0

Answer:

1. (3 * 6) + (3 * x) = 24

2. 18 + 3 * x = 24

3. 6 + x = 8

Step-by-step explanation:

We have the equation which is:

3 * (6 + x) = 24

The order of the solution would be as follows:

First step:

(3 * 6) + (3 * x) = 24

Second step:

18 + 3 * x = 24

Third step:

6 + x = 8

The rest of the steps are wrong, and have nothing to do with solving the equation.

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Assume that when adults with smartphones are randomly selected, 57% use them in meetings or classes. If 8 adult smartphone use

maxonik [38]

Answer: 0.0575

Step-by-step explanation:

Binomial probability distribution :-

$P(x)=^nC_xp^x(1-p)^{n-x}$ , where P(X) is the probability of getting success in x trials, n is the total number of trials and p is the probability of success in each trial ( in decimal ).

Given : The probability that adults use smartphones in meetings or classes = 0.57

Sample size : n= 8

Now, the probability that exactly 2 of them use their smartphones in meetings or classes :-

$P(x)=^8C_2(0.57)^2(0.43)^{6}\\\\=\dfrac{8!}{(8-2)!2!}(0.57)^2(0.43)^{6}\\\\=0.0575067039294\approx0.0575$

Hence, the required probability = 0.0575

6 0

3 years ago

What number is 30% of 100

Taya2010 [7]

Answer:

Step-by-step explanation:

8 0

4 years ago

Read 2 more answers

Find the slope intercept equation of the line

sergeinik [125]

Answer:

Step-by-step explanation:

2/3 by inspection.. just looking at the graph

3 0

3 years ago

Help me please with math

fomenos

Let's make a table of differences

0 3 8 15 24

3 5 7 9

2 2 2

Constant second difference means a quadratic polynomial,

f(n)=an² + bn +c

f(1)=0, f(2)=3, f(3)=8

0 = a+b+c

3 = 4a + 2b + c

8 = 9a + 3b + c

Subtracting pairs

3 = 3a+b

5 = 5a + b

Subtracting,

2 = 2a

a = 1

b = 5 - 5a = 0

c = -a-b = -1

f(n)=n² -1

Duh, shoulda noticed that at the beginning.

f(17)=17²-1 = 288

a₁ =5

aₙ = aₙ₋₁ - 7

aₙ = a₁ + d(n-1)

aₙ = 5 - 7(n-1)

a₇ = 5 - 7(6) = -37

Answer: -37

4 0

4 years ago

Find the area of the rectangle below by multiplying its length and width.

wariber [46]

Hello!

When multiply binomials together, we should use the FOIL method.

The FOIL method is an acronym for First, Outer, Inner, and Last.

First, let's set up the expression.

(7x - 1)(3x - 2)

Now, we can multiply in accordance with the FOIL method.

First: 7x · 3x = 21x²

Outer: 7x · -2 = -14x

Inner: -1 · 3x = -3x

Last: -1 · -2 = 2

Now, we simplify the inner terms.

21x² - 14x - 3x + 2

21x² - 17x + 2

Therefore, the area of the rectangle is 21x² - 17x + 2.

8 0

3 years ago