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2 years ago

7

2/3x+15=4 With explaination

1 answer:

mezya [45]2 years ago

6 0

2/3x=4-15
2/3x=-11
2=3x*-11
2=-33x
2/-33=-33x/-33
x=-2/33

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Describe the steps you used to solve the equation and find the amount of Carrie’s allowance. Linear equation: 1/4 a + 1/3 a + 8

zzz [600]

Answer:24

Step-by-step explanation:

Subtract 8 from 22 = 1/4a+1/3a=14

Add the fractions together =7/12a=14

Divide 14 by 7/12 and a=24

4 0

2 years ago

Read 2 more answers

Suppose that the probability of a baseball player getting a hit in an at-bat is 0.3089. If the player has 25 at-bats during a we

klio [65]

Answer:

$P(X>9) = 0.3593$

Step-by-step explanation:

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:

$X \sim Binom(n=25, p=0.3089)$

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

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

For this case we want this probability:

$P(X >9)$

And we can use the complement rule like this:

$P(X>9) = 1-P(X \leq 8)= 1-[P(X=0) + P(X=1) +....+P(X=8)]$ And we can find the individual probabilities like this:

$P(X=0) =(25C0)(0.3089)^0 (1-0.3089)^{25-0} =0.0000974$

$P(X=1) =(25C1)(0.3089)^1 (1-0.3089)^{25-1} =0.0011$

$P(X=2) =(25C2)(0.3089)^2 (1-0.3089)^{25-2}=0.00584$

$P(X=3) =(25C3)(0.3089)^3 (1-0.3089)^{25-3}= 0.02$

$P(X=4) =(25C4)(0.3089)^4 (1-0.3089)^{25-4}=0.049$

$P(X=5) =(25C5)(0.3089)^5 (1-0.3089)^{25-5}=0.092$

$P(X=6)=(25C6) (0.3089)^6 (1-0.3089)^{25-6} = 0.138$

$P(X=7) =(25C7)(0.3089)^7 (1-0.3089)^{25-7}=0.167$

$P(X=8) =(25C8)(0.3089)^8 (1-0.3089)^{25-8}=0.168$

And in order to do the operations we can use the following excel code:

"=1-BINOM.DIST(8,25,0.3089,TRUE)"

And we got:

$P(X>9) = 0.3593$

4 0

2 years ago

Six students earned a perfect score on a history quiz. Only 5% of the entire grade earned a perfect score. How many students are

stiks02 [169]

Answer:

120

Step-by-step explanation:

If 6 = 5%, then 6 = 1/20 of the total grade. 6×20= 120

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2 years ago

A restaurant sells sandwiches and will deliver for an additional cost. To have three sandwiches delivered, it costs $20. To have

zimovet [89]

Answer:

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Step-by-step explanation:

If 3 sandwiches cost $20

Then x sandwiches cost $80

3----20

x----80

20x=3 x 80

20x=240

x=240/20

x=12 sandwiches

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2 years ago

I added the question and the example for reference. Please help! whoever is correct i will give brainliest!

Musya8 [376]

Answer:

It would be 828 inches cubed

Step-by-step explanation:

Because the boxes on top and bottom are both 6x8x6 and the middle portion is 6x7x6

6x8x6=288

6x7x6=252

288+288+252=828

3 0

2 years ago