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2 years ago

IF YOUR GOOD AT MATH THEM PLEASE ANSWER THIS !

Mathematics

2 answers:

baherus [9]2 years ago

6 0

x+5+x+x+5=4x+10

Answer:

4x+10

Step-by-step explanation:

x+5+x+x+5=4x+10

GrogVix [38]2 years ago

5 0

Answer ;
D/4
4x+10
Hope this helps!! (:

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Solve x^2-8x+41=0 for X

andrezito [222]

You get imaginary roots for this equation.

x=4-5i
x=4+5i

7 0

3 years ago

-17, 2, 21, 40, … is an arithmetic sequence. True False

Wewaii [24]

False

A arithmetic sequence is a sequence that has a difference of 2. We see that we have -17 ... and then we have 2 ... and then 21. There is NOT a difference of 2, as we can see. Therefore, yiur answer would be (false).

3 0

3 years ago

Historically 80% of the monitors made by your company will pass your stringent quality control checks. 40 monitors have just com

madam [21]

Answer:

a) 10.75% probability that exactly 30 of them will pass the quality control checks.

b) Expected value is 32

Variance is 6.4

Step-by-step explanation:

For each monitor, there are only two possible outcomes. Either they will pass the quality checks, or they will not pass these checks. The probability of a monitor passing these checks is independent of other monitors. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And p is the probability of X happening.

The expected value of the binomial distribution is:

$E(X) = np$

The variance of the binomial distribution is:

$V(X) = np(1-p)$

80% of the monitors made by your company will pass your stringent quality control checks.

This means that $p = 0.8$

40 monitors have just come off the assembly line.

This means that $n = 40$

a) What is the probability that exactly 30 of them will pass the quality control checks?

This is P(X = 30). So

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 30) = C_{40,30}.(0.8)^{30}.(0.2)^{10} = 0.1075$

10.75% probability that exactly 30 of them will pass the quality control checks.

b) What are the expected value and variance of the number of these monitors that will pass the quality control checks?

$E(X) = np = 40*0.8 = 32$

Expected value is 32

$V(X) = np(1-p) = 40*0.8*0.2 = 6.4$

Variance is 6.4

4 0

3 years ago

Jenny is throwing a surprise birthday party for her best friend Katie. She has decided to make Katie’s favorite dish, meat loaf.

miskamm [114]

Answer:

The answer is below

Step-by-step explanation:

a) The recipe for the meat loaf used by Jenny can serve a total of 8 people. Since there are 40 people in total to serve, the number of each ingredient needed is:

Number of each ingredient = total number of people / number of people served by one recipe

Number of each ingredient = 40 / 8 = 5

b) Since each recipe contains 1 1/2 lb (1.5 lbs) of ground beef, the total amount of ground beef needed to feed everyone is:

Total amount of ground beef = 1.5 lbs * 5 = 7.5 lbs

c) Since one serving would require 8 oz of milk. To serve everyone, the amount of milk needed is:

Amount of milk = 40 people * 8 oz = 320 oz

128 oz = 1 gallon

Amount of milk = 320 oz * 1 gallon / 128 oz = 2.5 gallon

6 0

2 years ago

Consider the function represented by 9x+3y= 12 with x as the independent variable. How can this function be written

jarptica [38.1K]

Answer:

b) y = f(x) = -3x+4

Step-by-step explanation:

Explanation

Given that the equation 9x+3y =12

Let 'x' be an independent variable and 'y' be the dependent variable then the function is of the form

y = f(x)

3 y = 12 - 9x

$y = \frac{-9x+12}{3}$

y = -3x+4

The function represented by y = -3x+4

5 0

2 years ago