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3 years ago

Please help need answer fast

Mathematics

2 answers:

KIM [24]3 years ago

8 0

The correct answer is y= 5x.

When y is equal to one, x is equal to 5.

I hope this helps!

Zina [86]3 years ago

8 0

C. y=5x
You can prove this by picking any x value and multiplying it by 5 to get the y value on the line shown.

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Pre-Algebra Due urgently Tysm

Vesna [10]

Answer:

1. x = 5 2. y = 4 3. x = -2

Step-by-step explanation:

2x - y = 9 -5x + 2y = 13 3x + 4y = -6

4x + y = 21 5x + y = -1 7x(-1) + 4y(-1) = -14(-1) <(multiply all by -1)

6x = 30 3y = 12 -4x = 8

6 6 3 3 4 4

x = 5 y = 4 x = -2

7 0

2 years ago

Read 2 more answers

It cost $1.25 for half a pound of birdseed . What is the unit rate and what does it represent

natima [27]

Answer:

Unit rate is $ 2.50. It represents the cost of one pound of birdseed.

Step-by-step explanation:

Given:

Cost of half a pound of birdseed = $ 1.25.

Unit rate is the rate of one pound of birdseed.

∵ Cost of half a pound of birdseed = $ 1.25.

∴ Cost of 1 pound of birdseed = $\frac{1.25}{\frac{1}{2} }=1.25\times 2= \$\textrm{ } 2.50$

Therefore, the unit rate is $ 2.50 and it represents the cost of one pound of birdseed.

8 0

3 years ago

Need answers, fast!!!

aksik [14]

I’ll help on some a) is 500 calories burned in a hour . B)walking 2 per hour

4 0

3 years ago

Help,..............................

azamat

The correct answer is 10,1 Have a great day! :)

7 0

3 years ago

Assume the random variable X has a binomial distribution with the given probability of obtaining a success. Find the following p

drek231 [11]

Answer:

$P(X=14)=(18C14)(0.8)^{14} (1-0.8)^{18-14}=0.2153$

$P(X=15)=(18C15)(0.8)^{15} (1-0.8)^{18-15}=0.2297$

$P(X=16)=(18C16)(0.8)^{16} (1-0.8)^{18-16}=0.1722$

$P(X=17)=(18C17)(0.8)^{17} (1-0.8)^{18-17}=0.0811$

$P(X=18)=(18C18)(0.8)^{18} (1-0.8)^{18-18}=0.0180$

And adding the values we got:

$P(X \geq 14)= 0.2153 +0.2297+0.1722+0.0811+0.0180=0.7164$

Step-by-step explanation:

Assuming this question: P(X≥14), n=18, p=0.8

Previous concepts

The binomial distribution is a "DISCRETE probability distribution that summarizes the probability that a value will take one of two independent values under a given set of parameters. The assumptions for the binomial distribution are that there is only one outcome for each trial, each trial has the same probability of success, and each trial is mutually exclusive, or independent of each other".

Solution to the problem

Let X the random variable of interest, on this case we now that:

$X \sim Binom(n=18, p=0.8)$

The probability mass function for the Binomial distribution is given as:

$P(X)=(nCx)(p)^x (1-p)^{n-x}$

Where (nCx) means combinatory and it's given by this formula:

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

And we want this probability:

$P(X \geq 14) = P(X=14) +P(X=15) +P(X=16)+P(X=17)+P(X=18)$

And we can find the individual proabilities using the probability mass function:

$P(X=14)=(18C14)(0.8)^{14} (1-0.8)^{18-14}=0.2153$

$P(X=15)=(18C15)(0.8)^{15} (1-0.8)^{18-15}=0.2297$

$P(X=16)=(18C16)(0.8)^{16} (1-0.8)^{18-16}=0.1722$

$P(X=17)=(18C17)(0.8)^{17} (1-0.8)^{18-17}=0.0811$

$P(X=18)=(18C18)(0.8)^{18} (1-0.8)^{18-18}=0.0180$

And adding the values we got:

$P(X \geq 14)= 0.2153 +0.2297+0.1722+0.0811+0.0180=0.7164$

5 0

3 years ago