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
marishachu [46]
3 years ago
8

La un concurs de matematica se dau 40 de probleme. Pentr fiecare raspuns corect se acorda 7 puncte, iar pentru fiecare raspuns g

resit se scad 5 puncte.La sfarsit,un elev a obtinut 232 de puncte.Cate raspunsuri corecte si cate raspunsuri gresite a dat elevul?
Mathematics
1 answer:
Ratling [72]3 years ago
6 0

Answer:

a primit 36 ​​corect ane 4 în mod greșit

Step-by-step explanation:

În această întrebare, ne preocupăm să calculăm numărul de răspunsuri corecte și de răspunsuri greșite pe care elevul le-a dat.

În primul rând, începem prin atribuirea de variabile.

Numărul de răspunsuri corecte să fie x în timp ce numărul de răspunsuri greșite să fie y

Deoarece există 40 de probleme în total, aceasta înseamnă că adăugarea ambelor este egală cu 40 matematic,

x + y = 40. ••• (i)

Acum să trecem la partea complicată. Fiecare răspuns corect = +7. Răspunsul corect total este astfel + 7x Fiecare răspuns greșit este = -5. Răspunsul total greșit este astfel -5y Punct total marcat = 232 Aceasta

înseamnă că; 7x -5y = 232 ••••••••• (ii)

De la i, putem spune y = 40 -x să punem acest lucru în ecuație

ii 7x -5 (40-x) = 232

7x - 200 + 5x = 232

12x = 232 + 200 12x = 432 x = 432/12 x = 36 Deoarece y = 40 - x y = 40 - 36 y = 4

You might be interested in
Please answer the question
worty [1.4K]

Hmmm...I don't know what to tell you I can't type out your answer For you.

sorry

4 0
3 years ago
Read 2 more answers
Callan is buying a square shaped platter with an area of 169 square inches what is the correct step he should take if he wants t
bagirrra123 [75]

a = length of one side.

Area of a square = a^2

in our problem,

Area = 169 square inches

a = ?

Plug our numbers into the area formula mentioned above.

169 in^2 = a^2.

Take the square root of each side to find the side length of the square shaped platter.

13 = a

4 0
3 years ago
Kate, Alexia, and Trina just completed the 400-meter dash at the track meet. Kate finished the race 6 seconds faster than Alexia
Digiron [165]

Answer:

Kate = 52 seconds, Alexia = 58 seconds, Trina = 49 seconds

Step-by-step explanation:

A = K + 6

T = K - 3

K + A + T = 2 min 39 sec or 159 sec

K + (K + 6) + (K - 3) = 159sec

3K + 3 = 159sec

3K = 156sec

K = 52 sec

A = 52 + 6 = 58 sec

T = 52 - 3 = 49 sec

8 0
3 years ago
"bob places an 18-foot ladder 6 feet from the base of his house and leans it up against the side of his house. find, to the near
erik [133]
I WOULD LIKE TO HELP YOU. I WILL SEND YOU AN ATACHMENT. I THINK THAT I HELP YOU. 

8 0
3 years ago
What is one term or multiple terms connected by an addition or subtraction sign
Blizzard [7]

The answer is Like terms.

7 0
3 years ago
Other questions:
  • Volutie or Cyuniuers, cores, dhu SbrerCS - TULUrla - LEVEin
    10·1 answer
  • Solve the inequality of n _ 8 > 5​
    12·1 answer
  • A wheel with a radius of 19 meters is moving forward at 164.95 meters per second. How fast is the wheel rotating in radians per
    14·1 answer
  • I need help on this question if someone can help me that would be great
    6·2 answers
  • A population of bacterica is growing exponentially. It takes the population 15 minutes to double. How long will it take for the
    10·2 answers
  • A plane set off to Paris at a speed of 300mph. On the return flight of 12 hours, the plane cruised at 242mph. How many hours lon
    9·1 answer
  • Mario invested $475 in $45 and $25 stock shares. The number of $25 shares was 5 less than 3 times the number of $45 shares. How
    12·2 answers
  • If a fair coin is tossed 9 times, what is the probability, to the nearest thousandth, of
    13·1 answer
  • A telephone company charges $4.95 per month for long distance calls plus $0.05 per minute. The monthly cost c of long distance c
    15·1 answer
  • Help me with this someone.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!