1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
rewona [7]
3 years ago
11

A five-question quiz is taken in which the first and second questions have four answer choices, the third and fourth questions h

ave three answer choices, and the last question has five answer choices. If a student randomly marks an answer for each question, what is the expected number of questions he will answer correctly?
Mathematics
2 answers:
Andrej [43]3 years ago
5 0

Answer:

1.37

Step-by-step explanation:

pychu [463]3 years ago
3 0

Answer: choice a 1.37 is the awnser

Step-by-step explanation:

You might be interested in
The variables y and x^2 are directly
choli [55]

Answer:

y = \frac{20}{21} x²

Step-by-step explanation:

Given that y and x² are directly proportional then the equation relating them is

y = kx² ← k is the constant of proportion

When x = 2

y = k × 2² = 4k

When x = 5

y = k × 5² = 25k

Then

25k - 4k = 20 ( difference between values is 20 )

21k = 20 ( divide both sides by 21 )

k = \frac{20}{21}

y = \frac{20}{21} x² ← equation of proportion

6 0
2 years ago
Use an equation to find the value of k
Delvig [45]

\boxed{k=4}

<h2>Explanation:</h2>

We know that the slope of a line is given by:

m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}} \\ \\ Where: \\ \\ (x_{1},y_{1}) \ and \ (x_{2},y_{2}) \ are \ points \ that \ lie \ on \ the \ line \\ \\ \\ Here: \\ \\ (x_{1},y_{1})=(-2,k) \\ \\ (x_{2},y_{2})=(2,0) \\ \\ m=-1 \\ \\ \\ -1=\frac{0-k}{2-(-2)} \\ \\ -1=\frac{-k}{4} \\ \\ -k=4(-1) \\ \\ \boxed{k=4}

<h2>Learn more:</h2>

Proportional relationships lines, rates of change, and slope:

brainly.com/question/674693

#LearnWithBrainly

4 0
2 years ago
What is the value of x to the nearest tenth
marishachu [46]

You will have to use trig to solve this:

The side you have is adjacent to the known angle

The side you are looking for is opposite the known angle

^^^This means you need to use tan:

tan(24) = \frac{x}{12}

.445222 = \frac{x}{12}

^^^input tan(24) into calculator, then multiply 12 to both sides to isolate and solve for x

5.3 ≈ x

Hope this helped!

4 0
3 years ago
Will give brainliest to anyone that answers please don’t scam!!! I really need help:(
DochEvi [55]
The slope represents the the number of hours after the sunrise, and the y intercept represents the temperature
The linear function would y=4x+4
6.) y=4+ 10/5x
7.) y= -5 -3x
6 0
3 years ago
What is the sale price 45% of 69.50
Zolol [24]
   x         55
-------- = ---------
69.50     100

69.50*55= 3822.5
3822.5/100= 38.225
x=$38.22
5 0
3 years ago
Other questions:
  • Describe the transformation given? Please
    8·1 answer
  • Could Anyone please take a look at this Math problem; I am not good at explaining my work, Thank you.
    8·1 answer
  • Which has the lowest unit price ?
    5·2 answers
  • Complete the flow map using the words product
    12·1 answer
  • On a map, two inches equal 40 miles. If two cities are 115 miles apart, what is the distance between them on the map?​
    11·1 answer
  • Eduardo thinks of a number 1 and 20 that has exactly 5 factors. What number is he thinking of?
    10·1 answer
  • Solve for x in the equation x + 10 = 15. A. x = −5 B. x = 25 C. x = 10 D. x = 5
    9·2 answers
  • If two angles are complementary and one angle is 89º what is the measure of the other angle?
    7·1 answer
  • HELP ME 50 POINTS RN
    12·1 answer
  • Help in these two! See these questions below.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!