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
Natalija [7]
2 years ago
12

In a class test of 15 questions, (+4) marks are given for every correct answer, (– 2) marks are

Mathematics
1 answer:
romanna [79]2 years ago
3 0

If he answered 3 questions correctly, then the number of questions is got wrong is 7 and the number of questions that he did not attempt is 5.

<h3>What is the linear system?</h3>

A linear system is one in which the parameter in the equation has a degree of one. It might have one, two, or even more variables.

In a class test of 15 questions, (+4) marks are given for every correct answer, (– 2) marks are given for every incorrect answer, and 0 marks are given for questions that are not attempted. Punit scored (– 2) marks.

If he answered 3 questions correctly, then the number of the question are got wrong and the number of the question that he did not attempt.

Let x be the correct question and y be the incorrect question, z be the number of questions that he did not attempt, and A be the number of the total score. Then we have

4x – 2z = A

x + y + z = 15

If A = -2 and x = 3, then we have

4 × 3 – 2z = -2

      12 + 2 = 2z

              z = 7

Then the value of y will be

3 + y + 7 = 15

           y = 5

More about the linear system link is given below.

brainly.com/question/20379472

#SPJ1

You might be interested in
The population of Metsville is 1,274 people less than the population of Eden. If the population of Eden is 9,021 people, what is
yawa3891 [41]

Answer:

7,747

Step-by-step explanation:

9,021-1,274=7,747

4 0
3 years ago
Read 2 more answers
Please help! ( ;v;)/
OleMash [197]

Answer:

C:40

Step-by-step explanatio:

c²=h²-c²

c²=58²-42²

√c²= √3364- 1764

C=√1600

c=40

3 0
2 years ago
ANSWER SUPER QUICK
faltersainse [42]

Answer: The required equation is x=(7\times12-34.5)\div8\frac{1}{4}

Maria can cut 6 sections from the remaining rope.


Step-by-step explanation:

The total length of rope = 7 feet

since 1 feet = 12 inches

Therefore, 7 feet=7\times 12=84\ inches

Let x be the number of sections.

Since the instructions are to use 34.5 inches of rope to tie a tarp on top the the tent. Then, the remaining rope should be cut 8 1/4 inch sections to tie tent to stakes in the ground.

then the required equation will be

x=(7\times12-34.5)\div8\frac{1}{4}\\\Rightarrow\ x=(84-34.5)\div \frac{33}{4}\\\Rightarrow\ x=49.5\div8.25\\\Rightarrow\ x=6

So, maria can cut 6 sections.

3 0
2 years ago
Write this rate in its simplest form: $1200 in 50 days.
timama [110]

Answer:

$24:1

Step-by-step explanation:

1200:50

1200/50

$24:1

7 0
2 years ago
An arithmetic
Sunny_sXe [5.5K]

Answer:

an = 7.5 - 5.5(n - 1).

Step-by-step explanation:

The common difference d = -5.5.

The first term is given as 7.5.

Explicit formula is

an = a1 + (n - 1)d

= 7.5 + (n - 1)-5.5

= 7.5 - 5.5(n - 1)

8 0
2 years ago
Other questions:
  • How many relay teams of 4 members can be chosen from a 6 member team to run in a relay race?
    6·1 answer
  • Solve for x -9&lt;4x+3&lt;27 enter your answer as one inequality in the box
    12·1 answer
  • Work out plz I’ll give you brainliest
    12·1 answer
  • Solve the equation:<br><br>3x - x-2/3 = 4 - x-1/4​
    11·1 answer
  • Write a quadratic function to model the graph to the right
    14·1 answer
  • Which ratio does not represent the slope of a line​
    13·1 answer
  • Please help due in 10 minutes
    11·2 answers
  • Find 33⅓% of ⅘ of $4.50.​
    5·1 answer
  • What property is being used in 2a+5a=(2+5)a
    10·1 answer
  • Can someone help me will mark brainlist
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!