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alukav5142 [94]
3 years ago
12

Christian randomly select students from his grade to read a masters as easy moderate or difficult of the students he surveyed 13

said the test was easy 11 read it as moderate three found it difficult assuming that all students took the same test how many of the 162 total students and Christians grade would probably read the test something other than easy
A. 27
B.78
C.84
D.126
Mathematics
2 answers:
kakasveta [241]3 years ago
5 0
C-84
that help so much thank yo
Kryger [21]3 years ago
4 0

Answer:

C. 84.

Step-by-step explanation:

27 students in his grade took the test. 14 did not find it easy. 14/27 is 0.52. 0.52 times the 162 total students is 84.

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Solve by elimination:<br> x + 9y = 8<br> -6X - 9y = -3
WITCHER [35]

Answer:

(-1,1)

Step-by-step explanation:

x + 9y = 8

-6x - 9y = -3

Add the two equations together to eliminate y

x + 9y = 8

-6x - 9y = -3

---------------------

-5x   = 5

Divide by -5

-5x/-5 = 5/-5

x = -1

Now solve for y by substituting into the first equation

x+9y = 8

-1 + 9y =8

Add 1 to each side

-1+1 + 9y = 8+1

9y=9

Divide each side by 9

9y/9 = 9/9

y = 1

5 0
3 years ago
A coin is tossed 15 times. Find the probability of tossing seven or eight heads.
Mamont248 [21]
We will use Binomial Distribution in this case.

Since the coin is tossed 15 times. N which is the number of trails will be 15.

P = Probability of heads

Q = Probability of tails

X = No. heads occurring in each toss.

So, now we have to find the probability for exactly 10 heads.

P(x = 10) = C(15, 10) P^x Q^N-x

C(15, 10) (1/2)^10 (1/2)^5 = 0.0916
10.7K viewsView upvotes

3




Related Questions (More Answers Below)
3 0
3 years ago
Solve for a<br> (log(a-1))^2 =log10
Elza [17]

A function assigns the values. The value a is 11.

<h3>What is a Function?</h3>

A function assigns the value of each element of one set to the other specific element of another set.

The given logarithmic function can be solved as shown below.

(\log(a-1))^2 =\log10\\\\(\log(a-1))^2 =1\\\\(\log(a-1)) =\sqrt1\\\\\log(a-1) = 1\\\\10^1 = a-1\\\\a = 11

Hence, the value a is 11.

Learn more about Function:

brainly.com/question/5245372

#SPJ1

5 0
2 years ago
This is a word problem where you have to create an equation and a solution to.
IrinaVladis [17]
You are asked to find the team score, so it is convenient to let a variable represent that value. Let's call it "s", for "score". The problem statement tells you
.. Michaela scored s/5 . . . . . one fifth of the team's points
.. Aleah scored s/10 . . . . . . . one tenth o the team's points
These scores together are (s/5 +s/10) and that amount is 42 points.
.. s/5 +s/10 = 42
.. s(2/10 +1/10) = 42 . . . . . factor out s
.. s(3/10) = 42 . . . . . . . . . . form the sum of the numbers in parentheses
.. s = 42*10/3 = 140 . . . . . multiply by the inverse of the coefficient of s

The team scored 140 points.

______
Michaela scored 140/5 = 28 points; Aleah scored 140/10 = 14 points.
3 0
4 years ago
Plz plz help me look at the image
Dominik [7]

Answer:

10

Step-by-step explanation:

2(x + 4) = 28

(x + 4) =  \frac{28}{2}

x + 4 = 14

x = 14 - 4

x = 10

3 0
3 years ago
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