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
nexus9112 [7]
3 years ago
14

A test is worth 80 points. Multiple-choice questions are worth 2 points, and

Mathematics
1 answer:
gavmur [86]3 years ago
4 0

Answer:

<u>There are 10 multiple-choice questions and 15 short-answer questions in the test</u>

Step-by-step explanation:

1. Let's review the information given to us to answer the question correctly:

Test worth 80 points

Multiple-choice questions are worth 2 points

Short-answer questions are worth 4 points

Multiple-choice questions + Short-answer questions = 25

2. How  many multiple-choice questions are there?

Let's solve this problem, this way:

m = Multiple-choice questions

s = Short-answer questions

Our equations system is:

m + s = 25

2m + 4s = 80

Solving for m in the 1st equation:

m + s = 25

m = 25 - s

Substituting m in the 2nd equation and solving for s:

2m + 4s = 80

2 * ( 25 - s) + 4s = 80

50 - 2s + 4s = 80

2s = 80 - 50

2s = 30

<u>s = 30/2 = 15</u>

Substituting s in the 1st equation and solving for m:

m = 25 - 15

<u>m = 10 </u>

<u>There are 10 multiple-choice questions and 15 short-answer questions in the test</u>

You might be interested in
11.
g100num [7]

Answer:

You spend $55.78 more buying luxury items then store brand items.

Step-by-step explanation:

You have to add up all the items costs for the store branded items. And then you have to add up all the items costs for the luxury branded items. Then you subtract the luxury item costs, from the store brand items and you get, $55.78.

I HOPE THIS HELPED YOU!!!!

7 0
3 years ago
Samples of skin experiencing desquamation are analyzed for both moisture and melanin content. The results from 100 skin samples
zheka24 [161]

Answer: a. 0.40   b. 0.23  c . 0.435   d . 0.25

Step-by-step explanation:

                                   melanin      content    Total

                                            high   low

moisture   high                     13      10                23

content    low                       47      30                77

 Total                                   60      40              <u> </u><u>100</u>

Let A denote the event that a sample has low melanin content, and let B denote the event that a sample has high moisture content.

a) Total skin samples has low melanin content = 10+30=40

P(A)=\dfrac{40}{100}=0.40

b) Total skin samples has high moisture content = 13+10=23

P(B) =\dfrac{23}{100}=0.23

c) A ∩ B =  Total skin samples has both low melanin content and high moisture content =10

P(A ∩ B) =\dfrac{10}{100}=0.10

Using conditional probability formula , P (A|B)=\dfrac{P(A\cap B)}{P(B)}

P (A|B)=\dfrac{0.10}{0.23}=0.434782608696\approx0.435

d)  P (B|A)=\dfrac{P(A\cap B)}{P(A)}

P (B|A)=\dfrac{0.10}{0.40}=0.25

8 0
3 years ago
Farmer Jonson is putting together vegetable baskets. He has 270 carrots and 180 beets. What is the largest number of baskets he
Nostrana [21]
Factors of 180:

1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180.


Factors of 270:

1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 45, 54, 90, 135, 270.


What are the factors of both 270 and 180?

1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90.

Which one of these would give us the greatest amount of baskets possible?

Answer: 90 baskets.

I hope this helped you! c:
4 0
3 years ago
If a polygon has four right angles, then it is either a square or a rectangle.
morpeh [17]
B. A polygon is either a square or a rectangle
5 0
2 years ago
Which value equivalent to (f•g)(10)?
Anna35 [415]

Answer:wha

Step-by-step explanation:

5 0
2 years ago
Other questions:
  • What is the benchmark fraction of 7/10 x 16
    14·1 answer
  • Explain why all linear angle pairs must be supplementary, but all supplementary angles do not have to be linear pairs?
    13·1 answer
  • 3. Given: Circle Q<br>&lt;A = 35<br>Find: m AB​
    10·1 answer
  • given 65,72 and 96 as the three sides of a triangle, classify it as one of the following in the picture. please help!!!!​
    12·1 answer
  • How many commuters must be randomly selected to estimate the mean driving time of Chicago commuters? We want 90% confidence that
    14·2 answers
  • Please help asap!!!!
    6·1 answer
  • What is the area of this cross section of this rectangular prism?
    13·1 answer
  • Please help with this question thanksm
    15·1 answer
  • Is kilobyte bigger than megabyte.
    9·2 answers
  • Solve the formula 4x+7y=9 for y.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!