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LekaFEV [45]
3 years ago
13

50 PTS AND 25 MORE IF U GET BRAIN PLSSSSSSSSSSSSSSS

Mathematics
2 answers:
Zolol [24]3 years ago
7 0

#1

\\ \sf{:}\!\implies -2(x+4)+10

\\ \sf{:}\!\implies -2x-8+10

\\ \sf{:}\!\implies x+2x>2+7

\\ \sf{:}\!\implies 3x>9

\\ \sf{:}\!\implies x>\dfrac{9}{3}

\\ \sf{:}\!\implies x>3

#2

\\ \sf{:}\!\implies -2x+9>3(x+8)

\\ \sf{:}\!\implies -2x+9>3x+24

\\ \sf{:}\!\implies -2x-3x>24-9

\\ \sf{:}\!\implies -5x>15

\\ \sf{:}\!\implies x

\\ \sf{:}\!\implies x

Option B

Misha Larkins [42]3 years ago
4 0

-2(x+4)+103(x+8)\\\\-2\cdot x+(-2)\cdot4+103\cdot x+3\cdot8\\\\-2x-8+103x+24\\\\-2x-x24-9\\\\-3x15\quad|\div(-5)\\\\\boxed{x>3\qquad\vee\qquad x

Answer B

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Pls confirm if right. Thx!
Sloan [31]

Answer:

If I am thinking right ya

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
A candy company claims that 20% of the candies in its bags are colored green. Steve buys 30 bags of 30 candies, randomly selects
Allisa [31]

Answer:

The probability of Steve agreeing with the company’s claim is 0.50502.

Step-by-step explanation:

Let <em>X</em> denote the number of green candies.

The probability of green candies is, <em>p</em> = 0.20.

Steve buys 30 bags of 30 candies, randomly selects one candy from each, and counts the number of green candies.

So, <em>n</em> = 30 candies are randomly selected.

All the candies are independent of each other.

The random variable <em>X</em> follows a binomial distribution with parameter <em>n</em> = 30 and <em>p</em> = 0.20.

It is provided that if there are 5, 6, or 7 green candies, Steve will conclude that the company’s claim is correct.

Compute the probability of 5, 6 and 7 green candies as follows:

P(X=5)={30\choose 5}(0.20)^{5}(1-0.20)^{30-5}=0.17228\\\\P(X=6)={30\choose 6}(0.20)^{6}(1-0.20)^{30-6}=0.17946\\\\P(X=7)={30\choose 7}(0.20)^{7}(1-0.20)^{30-7}=0.15328

Then the probability of Steve agreeing with the company’s claim is:

P (Accepting the claim) = P (X = 5) + P (X = 6) + P (X = 7)

                                       = 0.17228 + 0.17946 + 0.15328

                                       = 0.50502

Thus, the probability of Steve agreeing with the company’s claim is 0.50502.

7 0
4 years ago
Three brothers have ages that are consecutive even integers. the product of the first and third boys' ages is 20 more than wice
vladimir1956 [14]
Let the first brother = x 
second brother = x + 2
third brother = x + 4

<span>The product of the first and third boys' ages is 20 more than twice the second boy's age:

x(x+4) = 2(x+2) + 20
x</span>² + 4x = 2x + 4 + 20
x² + 4x - 2x - 24 = 0
x² + 2x - 24 = 0
(x - 4)(x + 6) = 0
x = 4 or -6 (rejected, age cannot be negative)

First brother = 4
Second brother = 4 + 2 = 6
Third brother = 4 + 4 = 8

The three boys are 4, 6, and 8 years old. 

6 0
3 years ago
Read 2 more answers
Can someone divide this using long division please :) <br> (4x^3– 2x^2 – 3) divide by (2x^2 - 1)
krek1111 [17]

Answer:

The quotient is 2x+1. The remainder is 2x-2

Step-by-step explanation:

5 0
3 years ago
The starting salary for a computer programmer major has a mean of $39,269 and a standard deviation of $2550. The probability tha
Nimfa-mama [501]

Answer:

The probability that a randomly selected programmer major received a salary less than 38000 is 0,3085

Step-by-step explanation:

We will assume that the salaries are Normally distributed. Lets call X the salary of a random major programmer in dollars. We want the pprobability of X being less than 38000. For it, we will standarize X. Lets call W the standarization, given by the formula

W = \frac{X-\mu}{\sigma}=\frac{X-39269}{2550}

Lets denote \phi the cumulative distribution function of the standard normal variable W. The values of \phi are well known and they can be found in the attached file. Now, lets calcualte the probability of X being less than 38000 using \phi

P(X

Since the density function of a standard normal random variable is symmetric, then \phi(-0.50) = 1-\phi(0.50) = 1-0.6915 = 0.3085

The probability that a randomly selected programmer major received a salary less than 38000 is 0,3085.

Download pdf
7 0
3 years ago
Read 2 more answers
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