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ella [17]
3 years ago
9

On a multiple choice test with 17 questions, each question has four possible answer, one of which is correct. For students who g

uess at all answers, find the mean for the number of correct answers.
a. 12.8
b. 8.5
c. 4.3
d. 5.7
Mathematics
1 answer:
Virty [35]3 years ago
3 0

Answer:

C. 4.3

Step-by-step explanation:

Given that

n = 17

P = 1/4

Using binomial

Mean = np

Mean = 17 × (1/4)

= 17 × .25

= 4.25

Approximately = 4.3

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Solve 5(11x - 2) = 155
julia-pushkina [17]

Answer:

5(11x-2) = 155

55x - 10 = 155

55x = 165

x = 165/55

x = 3

Step-by-step explanation:

hope it helps

5 0
3 years ago
tim earns $150/week plus $15.00 for each desk he assembles. Write an inequality to represent how many desks he needs assemble to
Gennadij [26K]

x = number of desks needed to make

equation:  150 +15.50x >= 400


solution:

150 +15.50x >=400

15.50x = 250

x = 250/15.50 = 16.129

he needs to assemble 17 desks

15.50*17 = 263.50 +150 = $413.50


3 0
3 years ago
4/15ths of 49. I know the answer but I can’t seem to figure out how to do the work so if someone could tell me the steps on how
DedPeter [7]

Answer:

.65

Step-by-step explanation:

Have you ever given up working on a math problem because you couldn’t figure out the next step? Wolfram|Alpha can guide you step by step through the process of solving many mathematical problems, from solving a simple quadratic equation to taking the integral of a complex function.

When trying to find the roots of 3x2+x–7=4x, Wolfram|Alpha can break down the steps for you if you click the “Show steps” button in the Result pod.

6 0
3 years ago
Allan plays a video game in which he starts with 0 points. In round 1, he loses 3 1/2 points, in rounds 2, he wins 28 1/2 points
weqwewe [10]

Answer:

Step-by-step explanation:

start with 0

round 1 : lose 3 1/2

round 2: wins 28 1/2

round 3 : lose 3 1/2

0 - 3 1/2 + 28 1/2 - 3 1/2 =

28 1/2 - 7 =

21 1/2 <==== thats 21 and 1/2 points

5 0
3 years ago
Will give thank,brainly and 5 stars!
konstantin123 [22]

The second and last one.

The second one multiplies the cost of each type of ticket by two, therefore saying that you wanted to buy two of each type of ticket.

The last one multiplies the cost of a single ticket of all three types and multiplies it by 2.

6 0
2 years ago
Read 2 more answers
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